diff --git a/tests/lib/collection/queue_test.dart b/tests/lib/collection/queue_test.dart
index 0abfa511da3..f25fa15a7eb 100644
--- a/tests/lib/collection/queue_test.dart
+++ b/tests/lib/collection/queue_test.dart
@@ -225,9 +225,31 @@ abstract class QueueTest {
     queue.retainWhere((x) => x != 3);
     testLength(23, queue);
 
-    Expect.listEquals(
-        [6, 8, 9, 1, 2, 4, 5, 6, 8, 9, 10, 1, 2, 4, 5, 6, 8, 9, 10, 1, 2, 4, 5],
-        queue.toList());
+    Expect.listEquals([
+      6,
+      8,
+      9,
+      1,
+      2,
+      4,
+      5,
+      6,
+      8,
+      9,
+      10,
+      1,
+      2,
+      4,
+      5,
+      6,
+      8,
+      9,
+      10,
+      1,
+      2,
+      4,
+      5,
+    ], queue.toList());
 
     // Regression test: http://dartbug.com/16270
     // These should all do nothing, and should not throw.
diff --git a/tests/lib/collection/regress_47852_test.dart b/tests/lib/collection/regress_47852_test.dart
index 4345878f269..4b2bc7fbc68 100644
--- a/tests/lib/collection/regress_47852_test.dart
+++ b/tests/lib/collection/regress_47852_test.dart
@@ -14,7 +14,9 @@ void originalError() {
   map.putIfAbsent(key, () {
     wasAbsent = true;
     Expect.isFalse(
-        map.containsKey(key), 'containsKey should be false in putIfAbsent');
+      map.containsKey(key),
+      'containsKey should be false in putIfAbsent',
+    );
     return key;
   });
   Expect.isTrue(wasAbsent);
@@ -39,7 +41,7 @@ class Dumb {
 final keys = [
   123,
   3.14,
-  10.0,  // int or double depending on platform.
+  10.0, // int or double depending on platform.
   'aString',
   #someSymbol,
   true,
@@ -66,8 +68,10 @@ void testMap(Map<Object?, Object?> map) {
     bool wasAbsent = false;
     map.putIfAbsent(key, () {
       wasAbsent = true;
-      Expect.isFalse(map.containsKey(key),
-          'containsKey should be false in putIfAbsent. key = $key');
+      Expect.isFalse(
+        map.containsKey(key),
+        'containsKey should be false in putIfAbsent. key = $key',
+      );
       return key;
     });
     Expect.isTrue(wasAbsent);
@@ -88,12 +92,18 @@ void main() {
   testMap(LinkedHashMap.identity()); // Should be same as `Map.identity()`.
 
   // Custom maps:
-  testMap(HashMap(
+  testMap(
+    HashMap(
       equals: (k1, k2) => k2 == k1,
       hashCode: (key) => key.hashCode + 1,
-      isValidKey: (_) => true));
-  testMap(LinkedHashMap(
+      isValidKey: (_) => true,
+    ),
+  );
+  testMap(
+    LinkedHashMap(
       equals: (k1, k2) => k2 == k1,
       hashCode: (key) => key.hashCode + 1,
-      isValidKey: (_) => true));
+      isValidKey: (_) => true,
+    ),
+  );
 }
diff --git a/tests/lib/convert/ascii_test.dart b/tests/lib/convert/ascii_test.dart
index 06aa7efd506..6d50001420a 100644
--- a/tests/lib/convert/ascii_test.dart
+++ b/tests/lib/convert/ascii_test.dart
@@ -8,14 +8,14 @@ import 'dart:convert';
 var asciiStrings = [
   "pure ascii",
   "\x00 with control characters \n",
-  "\x01 edge cases \x7f"
+  "\x01 edge cases \x7f",
 ];
 
 var nonAsciiStrings = [
   "\x80 edge case first",
   "Edge case ASCII \u{80}",
   "Edge case byte \u{ff}",
-  "Edge case super-BMP \u{10000}"
+  "Edge case super-BMP \u{10000}",
 ];
 
 void main() {
@@ -50,9 +50,13 @@ void testDirectConversions() {
     }
 
     for (var nonAsciiString in nonAsciiStrings) {
-      Expect.throws(() {
-        print(codec.encoder.convert(nonAsciiString));
-      }, (_) => true, nonAsciiString);
+      Expect.throws(
+        () {
+          print(codec.encoder.convert(nonAsciiString));
+        },
+        (_) => true,
+        nonAsciiString,
+      );
     }
 
     var encode = codec.encoder.convert;
@@ -113,7 +117,10 @@ void testDirectConversions() {
 }
 
 List<int> encode(
-    String str, int chunkSize, Converter<String, List<int>> converter) {
+  String str,
+  int chunkSize,
+  Converter<String, List<int>> converter,
+) {
   List<int> bytes = <int>[];
   var byteSink = new ByteConversionSink.withCallback(bytes.addAll);
   var stringConversionSink = converter.startChunkedConversion(byteSink);
@@ -129,7 +136,10 @@ List<int> encode(
 }
 
 String decode(
-    List<int> bytes, int chunkSize, Converter<List<int>, String> converter) {
+  List<int> bytes,
+  int chunkSize,
+  Converter<List<int>, String> converter,
+) {
   StringBuffer buf = new StringBuffer();
   var stringSink = new StringConversionSink.fromStringSink(buf);
   var byteConversionSink = converter.startChunkedConversion(stringSink);
@@ -149,7 +159,7 @@ void testChunkedConversions() {
   for (var converter in [
     ascii.encoder,
     new AsciiCodec().encoder,
-    new AsciiEncoder()
+    new AsciiEncoder(),
   ]) {
     for (int chunkSize in [1, 2, 5, 50]) {
       for (var asciiString in asciiStrings) {
@@ -168,7 +178,7 @@ void testChunkedConversions() {
   for (var converter in [
     ascii.decoder,
     new AsciiCodec().decoder,
-    new AsciiDecoder()
+    new AsciiDecoder(),
   ]) {
     for (int chunkSize in [1, 2, 5, 50]) {
       for (var asciiString in asciiStrings) {
diff --git a/tests/lib/convert/chunked_conversion1_test.dart b/tests/lib/convert/chunked_conversion1_test.dart
index edf788217bc..dc985599d2e 100644
--- a/tests/lib/convert/chunked_conversion1_test.dart
+++ b/tests/lib/convert/chunked_conversion1_test.dart
@@ -127,8 +127,11 @@ main() {
 
   // Test int->bool converter individually.
   Converter<int, bool> int2boolConverter = new IntBoolConverter1();
-  Expect.listEquals(
-      [true, false, true], [2, -2, 2].map(int2boolConverter.convert).toList());
+  Expect.listEquals([
+    true,
+    false,
+    true,
+  ], [2, -2, 2].map(int2boolConverter.convert).toList());
   var hasExecuted = false;
   boolSink = new MyChunkedBoolSink.withCallback((value) {
     hasExecuted = true;
@@ -146,8 +149,11 @@ main() {
 
   // Test bool->int converter individually.
   Converter<bool, int> bool2intConverter = new BoolIntConverter1();
-  Expect.listEquals(
-      [1, 0, 1], [true, false, true].map(bool2intConverter.convert).toList());
+  Expect.listEquals([
+    1,
+    0,
+    1,
+  ], [true, false, true].map(bool2intConverter.convert).toList());
   hasExecuted = false;
   intSink = new MyChunkedIntSink.withCallback((value) {
     hasExecuted = true;
@@ -237,8 +243,9 @@ main() {
   hasExecuted = false;
 
   // With identity between the two converters.
-  fused =
-      int2boolConverter.fuse(new IdentityConverter()).fuse(bool2intConverter);
+  fused = int2boolConverter
+      .fuse(new IdentityConverter())
+      .fuse(bool2intConverter);
   Expect.listEquals([1, 0, 1], [2, -2, 2].map(fused.convert).toList());
   hasExecuted = false;
   intSink2 = new MyChunkedIntSink.withCallback((value) {
diff --git a/tests/lib/convert/chunked_conversion_json_decode1_test.dart b/tests/lib/convert/chunked_conversion_json_decode1_test.dart
index 01227219a1a..e6ec82f01fa 100644
--- a/tests/lib/convert/chunked_conversion_json_decode1_test.dart
+++ b/tests/lib/convert/chunked_conversion_json_decode1_test.dart
@@ -17,42 +17,42 @@ final TESTS = [
   [[], "[]"],
   [
     [3, -4.5, true, "hi", false],
-    '[3,-4.5,true,"hi",false]'
+    '[3,-4.5,true,"hi",false]',
   ],
   [
     [null],
-    "[null]"
+    "[null]",
   ],
   [
     [
-      [null]
+      [null],
     ],
-    "[[null]]"
+    "[[null]]",
   ],
   [
     [
-      [3]
+      [3],
     ],
-    "[[3]]"
+    "[[3]]",
   ],
   [{}, "{}"],
   [
     {"x": 3, "y": 4.5, "z": "hi", "u": true, "v": false},
-    '{"x":3,"y":4.5,"z":"hi","u":true,"v":false}'
+    '{"x":3,"y":4.5,"z":"hi","u":true,"v":false}',
   ],
   [
     {"x": null},
-    '{"x":null}'
+    '{"x":null}',
   ],
   [
     {"x": {}},
-    '{"x":{}}'
+    '{"x":{}}',
   ],
   // Note that -0.0 won't be treated the same in JS. The Json spec seems to
   // allow it, though.
   [
     {"hi there": 499, "'": -0.0},
-    '{"hi there":499,"\'":-0.0}'
+    '{"hi there":499,"\'":-0.0}',
   ],
   [r'\foo', r'"\\foo"'],
 ];
@@ -81,8 +81,9 @@ bool isJsonEqual(o1, o2) {
 Object? decode(String str) {
   Object? result;
   var decoder = new JsonDecoder(null);
-  ChunkedConversionSink objectSink =
-      new ChunkedConversionSink.withCallback((x) => result = x.single);
+  ChunkedConversionSink objectSink = new ChunkedConversionSink.withCallback(
+    (x) => result = x.single,
+  );
   var stringConversionSink = decoder.startChunkedConversion(objectSink);
   stringConversionSink.add(str);
   stringConversionSink.close();
@@ -92,8 +93,9 @@ Object? decode(String str) {
 Object? decode2(String str) {
   Object? result;
   var decoder = new JsonDecoder(null);
-  ChunkedConversionSink objectSink =
-      new ChunkedConversionSink.withCallback((x) => result = x.single);
+  ChunkedConversionSink objectSink = new ChunkedConversionSink.withCallback(
+    (x) => result = x.single,
+  );
   var stringConversionSink = decoder.startChunkedConversion(objectSink);
   ClosableStringSink stringSink = stringConversionSink.asStringSink();
   stringSink.write(str);
@@ -104,8 +106,9 @@ Object? decode2(String str) {
 Object? decode3(String str) {
   Object? result;
   var decoder = new JsonDecoder(null);
-  ChunkedConversionSink objectSink =
-      new ChunkedConversionSink.withCallback((x) => result = x.single);
+  ChunkedConversionSink objectSink = new ChunkedConversionSink.withCallback(
+    (x) => result = x.single,
+  );
   var stringConversionSink = decoder.startChunkedConversion(objectSink);
   ClosableStringSink stringSink = stringConversionSink.asStringSink();
   str.codeUnits.forEach(stringSink.writeCharCode);
@@ -116,8 +119,9 @@ Object? decode3(String str) {
 Object? decode4(String str) {
   Object? result;
   var decoder = new JsonDecoder(null);
-  ChunkedConversionSink objectSink =
-      new ChunkedConversionSink.withCallback((x) => result = x.single);
+  ChunkedConversionSink objectSink = new ChunkedConversionSink.withCallback(
+    (x) => result = x.single,
+  );
   var stringConversionSink = decoder.startChunkedConversion(objectSink);
   ClosableStringSink stringSink = stringConversionSink.asStringSink();
   str.runes.forEach(stringSink.writeCharCode);
@@ -128,8 +132,9 @@ Object? decode4(String str) {
 Object? decode5(String str) {
   Object? result;
   var decoder = new JsonDecoder(null);
-  ChunkedConversionSink objectSink =
-      new ChunkedConversionSink.withCallback((x) => result = x.single);
+  ChunkedConversionSink objectSink = new ChunkedConversionSink.withCallback(
+    (x) => result = x.single,
+  );
   var stringConversionSink = decoder.startChunkedConversion(objectSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false);
   var tmpBytes = utf8.encode(str);
@@ -141,8 +146,9 @@ Object? decode5(String str) {
 Object? decode6(String str) {
   Object? result;
   var decoder = new JsonDecoder(null);
-  ChunkedConversionSink objectSink =
-      new ChunkedConversionSink.withCallback((x) => result = x.single);
+  ChunkedConversionSink objectSink = new ChunkedConversionSink.withCallback(
+    (x) => result = x.single,
+  );
   var stringConversionSink = decoder.startChunkedConversion(objectSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false);
   var tmpBytes = utf8.encode(str);
@@ -154,8 +160,9 @@ Object? decode6(String str) {
 Object? decode7(String str) {
   Object? result;
   var decoder = new JsonDecoder(null);
-  ChunkedConversionSink objectSink =
-      new ChunkedConversionSink.withCallback((x) => result = x.single);
+  ChunkedConversionSink objectSink = new ChunkedConversionSink.withCallback(
+    (x) => result = x.single,
+  );
   var stringConversionSink = decoder.startChunkedConversion(objectSink);
   stringConversionSink.addSlice("1" + str + "2", 1, str.length + 1, false);
   stringConversionSink.close();
@@ -166,14 +173,15 @@ main() {
   var tests = TESTS.expand((test) {
     var object = test[0];
     var string = test[1];
-    var longString = "                                                        "
+    var longString =
+        "                                                        "
         "                                                        "
         "$string"
         "                                                        "
         "                                                        ";
     return [
       test,
-      [object, longString]
+      [object, longString],
     ];
   });
   for (var test in tests) {
diff --git a/tests/lib/convert/chunked_conversion_json_encode1_test.dart b/tests/lib/convert/chunked_conversion_json_encode1_test.dart
index 5ffad23c3ab..ac69ce45a34 100644
--- a/tests/lib/convert/chunked_conversion_json_encode1_test.dart
+++ b/tests/lib/convert/chunked_conversion_json_encode1_test.dart
@@ -17,42 +17,42 @@ final TESTS = [
   [[], "[]"],
   [
     [3, -4.5, true, "hi", false],
-    '[3,-4.5,true,"hi",false]'
+    '[3,-4.5,true,"hi",false]',
   ],
   [
     [null],
-    "[null]"
+    "[null]",
   ],
   [
     [
-      [null]
+      [null],
     ],
-    "[[null]]"
+    "[[null]]",
   ],
   [
     [
-      [3]
+      [3],
     ],
-    "[[3]]"
+    "[[3]]",
   ],
   [{}, "{}"],
   [
     {"x": 3, "y": 4.5, "z": "hi", "u": true, "v": false},
-    '{"x":3,"y":4.5,"z":"hi","u":true,"v":false}'
+    '{"x":3,"y":4.5,"z":"hi","u":true,"v":false}',
   ],
   [
     {"x": null},
-    '{"x":null}'
+    '{"x":null}',
   ],
   [
     {"x": {}},
-    '{"x":{}}'
+    '{"x":{}}',
   ],
   // Note that -0.0 won't be treated the same in JS. The Json spec seems to
   // allow it, though.
   [
     {"hi there": 499, "'": -0.0},
-    '{"hi there":499,"\'":-0.0}'
+    '{"hi there":499,"\'":-0.0}',
   ],
   [r'\foo', r'"\\foo"'],
 ];
@@ -75,8 +75,9 @@ class MyStringConversionSink extends StringConversionSink {
 
 String encode(Object? o) {
   var result;
-  ChunkedConversionSink<String> stringSink =
-      new MyStringConversionSink((x) => result = x);
+  ChunkedConversionSink<String> stringSink = new MyStringConversionSink(
+    (x) => result = x,
+  );
   var objectSink = new JsonEncoder().startChunkedConversion(stringSink);
   objectSink.add(o);
   objectSink.close();
diff --git a/tests/lib/convert/chunked_conversion_utf82_test.dart b/tests/lib/convert/chunked_conversion_utf82_test.dart
index 2e07f87f447..bcc25ec47b5 100644
--- a/tests/lib/convert/chunked_conversion_utf82_test.dart
+++ b/tests/lib/convert/chunked_conversion_utf82_test.dart
@@ -50,7 +50,7 @@ final TESTS0 = [
   // Unfinished UTF-8 sequences.
   [0xc3],
   [0xE2, 0x82],
-  [0xF0, 0xA4, 0xAD]
+  [0xF0, 0xA4, 0xAD],
 ];
 
 final TESTS1 = [
@@ -73,153 +73,153 @@ final TESTS1 = [
   [0xC0, 0x80],
   [0xC1, 0x80],
   // Outside valid range.
-  [0xF4, 0xBF, 0xBF, 0xBF]
+  [0xF4, 0xBF, 0xBF, 0xBF],
 ];
 
 final TESTS2 = [
   // Test that 0xC0|1, 0x80 does not eat the next character.
   [
     [0xC0, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xC1, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   // 0xF5 .. 0xFF never appear in valid UTF-8 sequences.
   [
     [0xF5, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF6, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF7, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF8, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF9, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFA, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFB, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFC, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFD, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFE, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFF, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF5, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF6, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF7, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF8, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF9, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFA, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFB, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFC, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFD, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFE, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFF, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   // Characters outside the valid range.
   [
     [0xF5, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF6, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF7, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF8, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF9, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFA, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFB, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFC, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFD, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFE, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFF, 0x80, 0x80, 0x61],
-    "XXXa"
-  ]
+    "XXXa",
+  ],
 ];
 
 main() {
@@ -227,46 +227,47 @@ main() {
     // Pairs of test and expected string output when malformed strings are
     // allowed. Replacement character: U+FFFD, one per unfinished sequence or
     // undecodable byte.
-    String replacement =
-        TESTS0.contains(test) ? "\u{FFFD}" : "\u{FFFD}" * test.length;
+    String replacement = TESTS0.contains(test)
+        ? "\u{FFFD}"
+        : "\u{FFFD}" * test.length;
     return [
       [test, "${replacement}"],
       [
         [0x61, ...test],
-        "a${replacement}"
+        "a${replacement}",
       ],
       [
         [0x61, ...test, 0x61],
-        "a${replacement}a"
+        "a${replacement}a",
       ],
       [
         [...test, 0x61],
-        "${replacement}a"
+        "${replacement}a",
       ],
       [
         [...test, ...test],
-        "${replacement}${replacement}"
+        "${replacement}${replacement}",
       ],
       [
         [...test, 0x61, ...test],
-        "${replacement}a${replacement}"
+        "${replacement}a${replacement}",
       ],
       [
         [0xc3, 0xa5, ...test],
-        "å${replacement}"
+        "å${replacement}",
       ],
       [
         [0xc3, 0xa5, ...test, 0xc3, 0xa5],
-        "å${replacement}å"
+        "å${replacement}å",
       ],
       [
         [...test, 0xc3, 0xa5],
-        "${replacement}å"
+        "${replacement}å",
       ],
       [
         [...test, 0xc3, 0xa5, ...test],
-        "${replacement}å${replacement}"
-      ]
+        "${replacement}å${replacement}",
+      ],
     ];
   });
 
@@ -277,7 +278,10 @@ main() {
     return [test[0], expected];
   });
 
-  for (var test in []..addAll(allTests)..addAll(allTests2)) {
+  for (var test
+      in []
+        ..addAll(allTests)
+        ..addAll(allTests2)) {
     List<int> bytes = test[0];
     Expect.throwsFormatException(() => decode(bytes, 1));
     Expect.throwsFormatException(() => decode(bytes, 2));
diff --git a/tests/lib/convert/chunked_conversion_utf84_test.dart b/tests/lib/convert/chunked_conversion_utf84_test.dart
index 206a8a9ca34..2fea38aaf18 100644
--- a/tests/lib/convert/chunked_conversion_utf84_test.dart
+++ b/tests/lib/convert/chunked_conversion_utf84_test.dart
@@ -9,8 +9,9 @@ import 'unicode_tests.dart';
 String decode(List<int> bytes, int chunkSize) {
   // Use a non-chunked interface.
   late String result;
-  var chunkedSink =
-      new StringConversionSink.withCallback((decoded) => result = decoded);
+  var chunkedSink = new StringConversionSink.withCallback(
+    (decoded) => result = decoded,
+  );
   var byteSink = new Utf8Decoder().startChunkedConversion(chunkedSink);
   int i = 0;
   while (i < bytes.length) {
diff --git a/tests/lib/convert/chunked_conversion_utf85_test.dart b/tests/lib/convert/chunked_conversion_utf85_test.dart
index 648781825b7..27b8e967938 100644
--- a/tests/lib/convert/chunked_conversion_utf85_test.dart
+++ b/tests/lib/convert/chunked_conversion_utf85_test.dart
@@ -8,8 +8,9 @@ import 'unicode_tests.dart';
 
 List<int> encode(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   stringConversionSink.add(str);
   stringConversionSink.close();
@@ -18,8 +19,9 @@ List<int> encode(String str) {
 
 List<int> encode2(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ClosableStringSink stringSink = stringConversionSink.asStringSink();
   stringSink.write(str);
@@ -29,8 +31,9 @@ List<int> encode2(String str) {
 
 List<int> encode3(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ClosableStringSink stringSink = stringConversionSink.asStringSink();
   str.codeUnits.forEach(stringSink.writeCharCode);
@@ -40,8 +43,9 @@ List<int> encode3(String str) {
 
 List<int> encode4(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ClosableStringSink stringSink = stringConversionSink.asStringSink();
   str.runes.forEach(stringSink.writeCharCode);
@@ -51,8 +55,9 @@ List<int> encode4(String str) {
 
 List<int> encode5(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false);
   List<int> tmpBytes = utf8.encode(str);
@@ -63,8 +68,9 @@ List<int> encode5(String str) {
 
 List<int> encode6(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false);
   List<int> tmpBytes = utf8.encode(str);
@@ -75,8 +81,9 @@ List<int> encode6(String str) {
 
 List<int> encode7(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   stringConversionSink.addSlice("1" + str + "2", 1, str.length + 1, false);
   stringConversionSink.close();
diff --git a/tests/lib/convert/chunked_conversion_utf86_test.dart b/tests/lib/convert/chunked_conversion_utf86_test.dart
index 8c9a08c39fd..064d3de260e 100644
--- a/tests/lib/convert/chunked_conversion_utf86_test.dart
+++ b/tests/lib/convert/chunked_conversion_utf86_test.dart
@@ -32,7 +32,7 @@ final TESTS0 = [
   // Unfinished UTF-8 sequences.
   [0xc3],
   [0xE2, 0x82],
-  [0xF0, 0xA4, 0xAD]
+  [0xF0, 0xA4, 0xAD],
 ];
 
 final TESTS1 = [
@@ -55,153 +55,153 @@ final TESTS1 = [
   [0xC0, 0x80],
   [0xC1, 0x80],
   // Outside valid range.
-  [0xF4, 0xBF, 0xBF, 0xBF]
+  [0xF4, 0xBF, 0xBF, 0xBF],
 ];
 
 final TESTS2 = [
   // Test that 0xC0|1, 0x80 does not eat the next character.
   [
     [0xC0, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xC1, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   // 0xF5 .. 0xFF never appear in valid UTF-8 sequences.
   [
     [0xF5, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF6, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF7, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF8, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF9, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFA, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFB, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFC, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFD, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFE, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFF, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF5, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF6, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF7, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF8, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF9, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFA, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFB, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFC, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFD, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFE, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFF, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   // Characters outside the valid range.
   [
     [0xF5, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF6, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF7, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF8, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF9, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFA, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFB, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFC, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFD, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFE, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFF, 0x80, 0x80, 0x61],
-    "XXXa"
-  ]
+    "XXXa",
+  ],
 ];
 
 main() {
@@ -209,46 +209,47 @@ main() {
     // Pairs of test and expected string output when malformed strings are
     // allowed. Replacement character: U+FFFD, one per unfinished sequence or
     // undecodable byte.
-    String replacement =
-        TESTS0.contains(test) ? "\u{FFFD}" : "\u{FFFD}" * test.length;
+    String replacement = TESTS0.contains(test)
+        ? "\u{FFFD}"
+        : "\u{FFFD}" * test.length;
     return [
       [test, "${replacement}"],
       [
         [0x61, ...test],
-        "a${replacement}"
+        "a${replacement}",
       ],
       [
         [0x61, ...test, 0x61],
-        "a${replacement}a"
+        "a${replacement}a",
       ],
       [
         [...test, 0x61],
-        "${replacement}a"
+        "${replacement}a",
       ],
       [
         [...test, ...test],
-        "${replacement}${replacement}"
+        "${replacement}${replacement}",
       ],
       [
         [...test, 0x61, ...test],
-        "${replacement}a${replacement}"
+        "${replacement}a${replacement}",
       ],
       [
         [0xc3, 0xa5, ...test],
-        "å${replacement}"
+        "å${replacement}",
       ],
       [
         [0xc3, 0xa5, ...test, 0xc3, 0xa5],
-        "å${replacement}å"
+        "å${replacement}å",
       ],
       [
         [...test, 0xc3, 0xa5],
-        "${replacement}å"
+        "${replacement}å",
       ],
       [
         [...test, 0xc3, 0xa5, ...test],
-        "${replacement}å${replacement}"
-      ]
+        "${replacement}å${replacement}",
+      ],
     ];
   });
 
@@ -259,7 +260,10 @@ main() {
     return [test[0], expected];
   });
 
-  for (var test in []..addAll(allTests)..addAll(allTests2)) {
+  for (var test
+      in []
+        ..addAll(allTests)
+        ..addAll(allTests2)) {
     List<int> bytes = test[0];
     Expect.throwsFormatException(() => decode(bytes));
 
diff --git a/tests/lib/convert/chunked_conversion_utf87_test.dart b/tests/lib/convert/chunked_conversion_utf87_test.dart
index 5434f1f1f43..a79275c7165 100644
--- a/tests/lib/convert/chunked_conversion_utf87_test.dart
+++ b/tests/lib/convert/chunked_conversion_utf87_test.dart
@@ -7,8 +7,9 @@ import 'dart:convert';
 
 String decode(List<int> inputBytes) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false);
   inputByteSink.add(inputBytes);
@@ -18,8 +19,9 @@ String decode(List<int> inputBytes) {
 
 String decode2(List<int> inputBytes) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false);
   inputBytes.forEach((b) => inputByteSink.addSlice([0, b, 1], 1, 2, false));
@@ -29,8 +31,9 @@ String decode2(List<int> inputBytes) {
 
 String decodeAllowMalformed(List<int> inputBytes) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(true);
   inputByteSink.add(inputBytes);
@@ -40,8 +43,9 @@ String decodeAllowMalformed(List<int> inputBytes) {
 
 String decodeAllowMalformed2(List<int> inputBytes) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(true);
   inputBytes.forEach((b) => inputByteSink.addSlice([0, b, 1], 1, 2, false));
@@ -53,7 +57,7 @@ final TESTS0 = [
   // Unfinished UTF-8 sequences.
   [0xc3],
   [0xE2, 0x82],
-  [0xF0, 0xA4, 0xAD]
+  [0xF0, 0xA4, 0xAD],
 ];
 
 final TESTS1 = [
@@ -76,153 +80,153 @@ final TESTS1 = [
   [0xC0, 0x80],
   [0xC1, 0x80],
   // Outside valid range.
-  [0xF4, 0xBF, 0xBF, 0xBF]
+  [0xF4, 0xBF, 0xBF, 0xBF],
 ];
 
 final TESTS2 = [
   // Test that 0xC0|1, 0x80 does not eat the next character.
   [
     [0xC0, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xC1, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   // 0xF5 .. 0xFF never appear in valid UTF-8 sequences.
   [
     [0xF5, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF6, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF7, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF8, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF9, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFA, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFB, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFC, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFD, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFE, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFF, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF5, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF6, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF7, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF8, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF9, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFA, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFB, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFC, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFD, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFE, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFF, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   // Characters outside the valid range.
   [
     [0xF5, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF6, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF7, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF8, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF9, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFA, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFB, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFC, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFD, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFE, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFF, 0x80, 0x80, 0x61],
-    "XXXa"
-  ]
+    "XXXa",
+  ],
 ];
 
 main() {
@@ -230,46 +234,47 @@ main() {
     // Pairs of test and expected string output when malformed strings are
     // allowed. Replacement character: U+FFFD, one per unfinished sequence or
     // undecodable byte.
-    String replacement =
-        TESTS0.contains(test) ? "\u{FFFD}" : "\u{FFFD}" * test.length;
+    String replacement = TESTS0.contains(test)
+        ? "\u{FFFD}"
+        : "\u{FFFD}" * test.length;
     return [
       [test, "${replacement}"],
       [
         [0x61, ...test],
-        "a${replacement}"
+        "a${replacement}",
       ],
       [
         [0x61, ...test, 0x61],
-        "a${replacement}a"
+        "a${replacement}a",
       ],
       [
         [...test, 0x61],
-        "${replacement}a"
+        "${replacement}a",
       ],
       [
         [...test, ...test],
-        "${replacement}${replacement}"
+        "${replacement}${replacement}",
       ],
       [
         [...test, 0x61, ...test],
-        "${replacement}a${replacement}"
+        "${replacement}a${replacement}",
       ],
       [
         [0xc3, 0xa5, ...test],
-        "å${replacement}"
+        "å${replacement}",
       ],
       [
         [0xc3, 0xa5, ...test, 0xc3, 0xa5],
-        "å${replacement}å"
+        "å${replacement}å",
       ],
       [
         [...test, 0xc3, 0xa5],
-        "${replacement}å"
+        "${replacement}å",
       ],
       [
         [...test, 0xc3, 0xa5, ...test],
-        "${replacement}å${replacement}"
-      ]
+        "${replacement}å${replacement}",
+      ],
     ];
   });
 
@@ -280,7 +285,10 @@ main() {
     return [test[0], expected];
   });
 
-  for (var test in []..addAll(allTests)..addAll(allTests2)) {
+  for (var test
+      in []
+        ..addAll(allTests)
+        ..addAll(allTests2)) {
     List<int> bytes = test[0];
     Expect.throwsFormatException(() => decode(bytes));
     Expect.throwsFormatException(() => decode2(bytes));
diff --git a/tests/lib/convert/chunked_conversion_utf88_test.dart b/tests/lib/convert/chunked_conversion_utf88_test.dart
index 93cab53b646..71bebef144b 100644
--- a/tests/lib/convert/chunked_conversion_utf88_test.dart
+++ b/tests/lib/convert/chunked_conversion_utf88_test.dart
@@ -9,8 +9,9 @@ import 'dart:convert';
 
 List<int> encode(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   stringConversionSink.add(str);
   stringConversionSink.close();
@@ -19,8 +20,9 @@ List<int> encode(String str) {
 
 List<int> encode2(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ClosableStringSink stringSink = stringConversionSink.asStringSink();
   stringSink.write(str);
@@ -30,8 +32,9 @@ List<int> encode2(String str) {
 
 List<int> encode3(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ClosableStringSink stringSink = stringConversionSink.asStringSink();
   str.codeUnits.forEach(stringSink.writeCharCode);
@@ -41,8 +44,9 @@ List<int> encode3(String str) {
 
 List<int> encode4(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ClosableStringSink stringSink = stringConversionSink.asStringSink();
   str.runes.forEach(stringSink.writeCharCode);
@@ -52,8 +56,9 @@ List<int> encode4(String str) {
 
 List<int> encode5(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false);
   List<int> tmpBytes = utf8.encode(str);
@@ -64,8 +69,9 @@ List<int> encode5(String str) {
 
 List<int> encode6(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false);
   List<int> tmpBytes = utf8.encode(str);
@@ -76,8 +82,9 @@ List<int> encode6(String str) {
 
 List<int> encode7(String str) {
   late List<int> bytes;
-  var byteSink =
-      new ByteConversionSink.withCallback((result) => bytes = result);
+  var byteSink = new ByteConversionSink.withCallback(
+    (result) => bytes = result,
+  );
   var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink);
   stringConversionSink.addSlice("1" + str + "2", 1, str.length + 1, false);
   stringConversionSink.close();
diff --git a/tests/lib/convert/codec2_test.dart b/tests/lib/convert/codec2_test.dart
index 7af8d1a2929..f87b5f1f13e 100644
--- a/tests/lib/convert/codec2_test.dart
+++ b/tests/lib/convert/codec2_test.dart
@@ -27,7 +27,7 @@ main() {
     50,
     51,
     49,
-    93
+    93,
   ];
   Expect.listEquals(ENCODED, utf8.encode(RAW));
   Expect.equals(RAW, utf8.decode(ENCODED));
@@ -40,10 +40,13 @@ main() {
   Expect.listEquals(["122ç", 50, 50, 231], json.decode(JSON_ENCODED));
 
   // Test that the reviver is passed to the decoder.
-  var decoded = json.decode('{"p": 5}', reviver: (dynamic k, dynamic v) {
-    if (k == null) return v;
-    return v * 2;
-  });
+  var decoded = json.decode(
+    '{"p": 5}',
+    reviver: (dynamic k, dynamic v) {
+      if (k == null) return v;
+      return v * 2;
+    },
+  );
   Expect.equals(10, decoded["p"]);
   var jsonWithReviver = new JsonCodec.withReviver((dynamic k, dynamic v) {
     if (k == null) return v;
diff --git a/tests/lib/convert/html_escape_test.dart b/tests/lib/convert/html_escape_test.dart
index f40c18d7544..0be8cd0959b 100644
--- a/tests/lib/convert/html_escape_test.dart
+++ b/tests/lib/convert/html_escape_test.dart
@@ -10,7 +10,8 @@ const _NOOP = 'Nothing_to_escape';
 
 const _TEST_INPUT = """<A </test> of \xA0 "double" & 'single' values>""";
 
-const _OUTPUT_UNKNOWN = '&lt;A &lt;&#47;test&gt; of \xA0 &quot;double&quot; '
+const _OUTPUT_UNKNOWN =
+    '&lt;A &lt;&#47;test&gt; of \xA0 &quot;double&quot; '
     '&amp; &#39;single&#39; values&gt;';
 
 const _OUTPUT_ATTRIBUTE =
@@ -78,12 +79,24 @@ void main() {
   _testMode(htmlEscape, _TEST_INPUT, _OUTPUT_UNKNOWN);
   _testMode(const HtmlEscape(), _TEST_INPUT, _OUTPUT_UNKNOWN);
   _testMode(
-      const HtmlEscape(HtmlEscapeMode.unknown), _TEST_INPUT, _OUTPUT_UNKNOWN);
-  _testMode(const HtmlEscape(HtmlEscapeMode.attribute), _TEST_INPUT,
-      _OUTPUT_ATTRIBUTE);
-  _testMode(const HtmlEscape(HtmlEscapeMode.sqAttribute), _TEST_INPUT,
-      _OUTPUT_SQ_ATTRIBUTE);
+    const HtmlEscape(HtmlEscapeMode.unknown),
+    _TEST_INPUT,
+    _OUTPUT_UNKNOWN,
+  );
   _testMode(
-      const HtmlEscape(HtmlEscapeMode.element), _TEST_INPUT, _OUTPUT_ELEMENT);
+    const HtmlEscape(HtmlEscapeMode.attribute),
+    _TEST_INPUT,
+    _OUTPUT_ATTRIBUTE,
+  );
+  _testMode(
+    const HtmlEscape(HtmlEscapeMode.sqAttribute),
+    _TEST_INPUT,
+    _OUTPUT_SQ_ATTRIBUTE,
+  );
+  _testMode(
+    const HtmlEscape(HtmlEscapeMode.element),
+    _TEST_INPUT,
+    _OUTPUT_ELEMENT,
+  );
   _testMode(htmlEscape, _NOOP, _NOOP);
 }
diff --git a/tests/lib/convert/json_lib_test.dart b/tests/lib/convert/json_lib_test.dart
index faad0cf5683..6c63ae253e4 100644
--- a/tests/lib/convert/json_lib_test.dart
+++ b/tests/lib/convert/json_lib_test.dart
@@ -27,37 +27,61 @@ void testParsing() {
   // Lists.
   Expect.deepEquals([], json.decode(' [] '));
   Expect.deepEquals([], json.decode('[ ]'));
-  Expect.deepEquals([3, -4.5, true, 'hi', false],
-      json.decode(' [3, -4.5, true, "hi", false] '));
+  Expect.deepEquals([
+    3,
+    -4.5,
+    true,
+    'hi',
+    false,
+  ], json.decode(' [3, -4.5, true, "hi", false] '));
   // Nulls are tricky.
   Expect.deepEquals([null], json.decode('[null]'));
-  Expect.deepEquals([3, -4.5, null, true, 'hi', false],
-      json.decode(' [3, -4.5, null, true, "hi", false] '));
   Expect.deepEquals([
-    [null]
+    3,
+    -4.5,
+    null,
+    true,
+    'hi',
+    false,
+  ], json.decode(' [3, -4.5, null, true, "hi", false] '));
+  Expect.deepEquals([
+    [null],
   ], json.decode('[[null]]'));
   Expect.deepEquals([
     [3],
     [],
     [null],
-    ['hi', true]
+    ['hi', true],
   ], json.decode(' [ [3], [], [null], ["hi", true]] '));
 
   // Maps.
   Expect.deepEquals({}, json.decode(' {} '));
   Expect.deepEquals({}, json.decode('{ }'));
 
-  Expect.deepEquals({"x": 3, "y": -4.5, "z": "hi", "u": true, "v": false},
-      json.decode(' {"x":3, "y": -4.5,  "z" : "hi","u" : true, "v": false } '));
+  Expect.deepEquals({
+    "x": 3,
+    "y": -4.5,
+    "z": "hi",
+    "u": true,
+    "v": false,
+  }, json.decode(' {"x":3, "y": -4.5,  "z" : "hi","u" : true, "v": false } '));
 
-  Expect.deepEquals({"x": 3, "y": -4.5, "z": "hi"},
-      json.decode(' {"x":3, "y": -4.5,  "z" : "hi" } '));
+  Expect.deepEquals({
+    "x": 3,
+    "y": -4.5,
+    "z": "hi",
+  }, json.decode(' {"x":3, "y": -4.5,  "z" : "hi" } '));
 
-  Expect.deepEquals({"y": -4.5, "z": "hi", "x": 3},
-      json.decode(' {"y": -4.5,  "z" : "hi" ,"x":3 } '));
+  Expect.deepEquals({
+    "y": -4.5,
+    "z": "hi",
+    "x": 3,
+  }, json.decode(' {"y": -4.5,  "z" : "hi" ,"x":3 } '));
 
-  Expect.deepEquals(
-      {" hi bob ": 3, "": 4.5}, json.decode('{ " hi bob " :3, "": 4.5}'));
+  Expect.deepEquals({
+    " hi bob ": 3,
+    "": 4.5,
+  }, json.decode('{ " hi bob " :3, "": 4.5}'));
 
   Expect.deepEquals({'x': {}}, json.decode(' { "x" : { } } '));
   Expect.deepEquals({'x': {}}, json.decode('{"x":{}}'));
@@ -66,24 +90,30 @@ void testParsing() {
   Expect.deepEquals({'w': null}, json.decode('{"w":null}'));
 
   Expect.deepEquals({
-    "x": {"w": null}
+    "x": {"w": null},
   }, json.decode('{"x":{"w":null}}'));
 
   Expect.deepEquals(
-      {"x": 3, "y": -4.5, "z": "hi", "w": null, "u": true, "v": false},
-      json.decode(' {"x":3, "y": -4.5,  "z" : "hi",'
-          '"w":null, "u" : true, "v": false } '));
+    {"x": 3, "y": -4.5, "z": "hi", "w": null, "u": true, "v": false},
+    json.decode(
+      ' {"x":3, "y": -4.5,  "z" : "hi",'
+      '"w":null, "u" : true, "v": false } ',
+    ),
+  );
 
   Expect.deepEquals(
-      {
-        "x": {"a": 3, "b": -4.5},
-        "y": [{}],
-        "z": "hi",
-        "w": {"c": null, "d": true},
-        "v": null
-      },
-      json.decode('{"x": {"a":3, "b": -4.5}, "y":[{}], '
-          '"z":"hi","w":{"c":null,"d":true}, "v":null}'));
+    {
+      "x": {"a": 3, "b": -4.5},
+      "y": [{}],
+      "z": "hi",
+      "w": {"c": null, "d": true},
+      "v": null,
+    },
+    json.decode(
+      '{"x": {"a":3, "b": -4.5}, "y":[{}], '
+      '"z":"hi","w":{"c":null,"d":true}, "v":null}',
+    ),
+  );
 }
 
 void testStringify() {
@@ -108,28 +138,36 @@ void testStringify() {
   Expect.equals('[null,null,null]', json.encode(new List.filled(3, null)));
   validateRoundTrip([3, -4.5, null, true, 'hi', false]);
   Expect.equals(
-      '[[3],[],[null],["hi",true]]',
-      json.encode([
-        [3],
-        [],
-        [null],
-        ['hi', true]
-      ]));
+    '[[3],[],[null],["hi",true]]',
+    json.encode([
+      [3],
+      [],
+      [null],
+      ['hi', true],
+    ]),
+  );
 
   // Maps.
   Expect.equals('{}', json.encode({}));
   Expect.equals('{}', json.encode(new Map()));
   Expect.equals('{"x":{}}', json.encode({'x': {}}));
   Expect.equals(
-      '{"x":{"a":3}}',
-      json.encode({
-        'x': {'a': 3}
-      }));
+    '{"x":{"a":3}}',
+    json.encode({
+      'x': {'a': 3},
+    }),
+  );
 
   // Dart does not guarantee an order on the keys
   // of a map literal, so reparse and compare to the original Map.
-  validateRoundTrip(
-      {'x': 3, 'y': -4.5, 'z': 'hi', 'w': null, 'u': true, 'v': false});
+  validateRoundTrip({
+    'x': 3,
+    'y': -4.5,
+    'z': 'hi',
+    'w': null,
+    'u': true,
+    'v': false,
+  });
   validateRoundTrip({"x": 3, "y": -4.5, "z": 'hi'});
   validateRoundTrip({' hi bob ': 3, '': 4.5});
   validateRoundTrip({
@@ -137,17 +175,20 @@ void testStringify() {
     'y': [{}],
     'z': 'hi',
     'w': {'c': null, 'd': true},
-    'v': null
+    'v': null,
   });
 
   Expect.equals("4", json.encode(new ToJson(4)));
   Expect.equals('[4,"a"]', json.encode(new ToJson([4, "a"])));
   Expect.equals(
-      '[4,{"x":42}]',
-      json.encode(new ToJson([
+    '[4,{"x":42}]',
+    json.encode(
+      new ToJson([
         4,
-        new ToJson({"x": 42})
-      ])));
+        new ToJson({"x": 42}),
+      ]),
+    ),
+  );
 
   expectThrowsJsonError(() => json.encode([new ToJson(new ToJson(4))]));
   expectThrowsJsonError(() => json.encode([new Object()]));
@@ -161,8 +202,7 @@ void testStringifyErrors() {
   expectThrowsJsonError(() => json.encode(new ToJsoner("bad", throws: true)));
 
   // Throws if toJson returns non-serializable value.
-  expectThrowsJsonError(
-      () => json.encode(new ToJsoner(new TestClass())));
+  expectThrowsJsonError(() => json.encode(new ToJsoner(new TestClass())));
 
   // Throws on cyclic values.
   var a = [];
@@ -182,9 +222,7 @@ class TestClass {
   int x;
   String y;
 
-  TestClass()
-      : x = 3,
-        y = 'joe' {}
+  TestClass() : x = 3, y = 'joe' {}
 }
 
 class ToJsoner {
diff --git a/tests/lib/convert/json_pretty_test.dart b/tests/lib/convert/json_pretty_test.dart
index 78a47529e04..cc8d39d0250 100644
--- a/tests/lib/convert/json_pretty_test.dart
+++ b/tests/lib/convert/json_pretty_test.dart
@@ -15,7 +15,7 @@ void _testIndentWithNullChar() {
   var encoder = const JsonEncoder.withIndent('\x00');
   var encoded = encoder.convert([
     [],
-    [[]]
+    [[]],
   ]);
   Expect.equals("[\n\x00[],\n\x00[\n\x00\x00[]\n\x00]\n]", encoded);
 }
@@ -25,57 +25,71 @@ void main() {
 
   _expect(null, 'null');
 
-  _expect([
-    [],
-    [[]]
-  ], '''
+  _expect(
+    [
+      [],
+      [[]],
+    ],
+    '''
 [
   [],
   [
     []
   ]
-]''');
+]''',
+  );
 
-  _expect([1, 2, 3, 4], '''
+  _expect(
+    [1, 2, 3, 4],
+    '''
 [
   1,
   2,
   3,
   4
-]''');
+]''',
+  );
 
-  _expect([true, null, 'hello', 42.42], '''
+  _expect(
+    [true, null, 'hello', 42.42],
+    '''
 [
   true,
   null,
   "hello",
   42.42
-]''');
+]''',
+  );
 
-  _expect({"hello": [], "goodbye": {}}, '''{
+  _expect(
+    {"hello": [], "goodbye": {}},
+    '''{
   "hello": [],
   "goodbye": {}
-}''');
+}''',
+  );
 
-  _expect([
-    "test",
-    1,
-    2,
-    33234.324,
-    true,
-    false,
-    null,
-    {
-      "test1": "test2",
-      "test3": "test4",
-      "grace": 5,
-      "shanna": [0, 1, 2]
-    },
-    {
-      "lib": "app.dart",
-      "src": ["foo.dart", "bar.dart"]
-    }
-  ], '''[
+  _expect(
+    [
+      "test",
+      1,
+      2,
+      33234.324,
+      true,
+      false,
+      null,
+      {
+        "test1": "test2",
+        "test3": "test4",
+        "grace": 5,
+        "shanna": [0, 1, 2],
+      },
+      {
+        "lib": "app.dart",
+        "src": ["foo.dart", "bar.dart"],
+      },
+    ],
+    '''[
   "test",
   1,
   2,
@@ -100,7 +114,8 @@ void main() {
       "bar.dart"
     ]
   }
-]''');
+]''',
+  );
 }
 
 void _expect(Object? object, String expected) {
diff --git a/tests/lib/convert/json_test.dart b/tests/lib/convert/json_test.dart
index 7190a7b1e15..47637819ba1 100644
--- a/tests/lib/convert/json_test.dart
+++ b/tests/lib/convert/json_test.dart
@@ -19,17 +19,25 @@ void testJson(jsonText, expected) {
       }
     } else if (expected is Map) {
       Expect.isTrue(actual is Map);
-      Expect.equals(expected.length, actual.length,
-          "$path: Map size in $jsonText");
+      Expect.equals(
+        expected.length,
+        actual.length,
+        "$path: Map size in $jsonText",
+      );
       expected.forEach((key, value) {
         Expect.isTrue(actual.containsKey(key));
         compare(value, actual[key], "$path[$key] in $jsonText");
       });
     } else if (expected is num) {
-      Expect.equals(expected is int, actual is int,
-          "$path: not same number type in $jsonText");
-      Expect.isTrue(expected.compareTo(actual) == 0,
-          "$path: Expected: $expected, was: $actual in $jsonText");
+      Expect.equals(
+        expected is int,
+        actual is int,
+        "$path: not same number type in $jsonText",
+      );
+      Expect.isTrue(
+        expected.compareTo(actual) == 0,
+        "$path: Expected: $expected, was: $actual in $jsonText",
+      );
     } else {
       // String, bool, null.
       Expect.equals(expected, actual, "$path in $jsonText");
@@ -99,7 +107,10 @@ String escape(String s) {
       sb.writeCharCode(code);
     else {
       String hex = '000${code.toRadixString(16)}';
-      sb.write(r'\u' '${hex.substring(hex.length - 4)}');
+      sb.write(
+        r'\u'
+        '${hex.substring(hex.length - 4)}',
+      );
     }
   }
   return '$sb';
@@ -107,15 +118,22 @@ String escape(String s) {
 
 void testThrows(jsonText) {
   var message = "json = '${escape(jsonText)}'";
-  Expect.throwsFormatException(() => json.decode(jsonText),
-      "json.decode, $message");
-  Expect.throwsFormatException(() => jsonDecode(jsonText),
-      "jsonDecode, $message");
-  Expect.throwsFormatException(() => json.decoder.convert(jsonText),
-      "json.decoder.convert, $message");
-  Expect.throwsFormatException(() =>
-      utf8.decoder.fuse(json.decoder).convert(utf8.encode(jsonText)),
-      "utf8.decoder.fuse(json.decoder) o utf.encode, $message");
+  Expect.throwsFormatException(
+    () => json.decode(jsonText),
+    "json.decode, $message",
+  );
+  Expect.throwsFormatException(
+    () => jsonDecode(jsonText),
+    "jsonDecode, $message",
+  );
+  Expect.throwsFormatException(
+    () => json.decoder.convert(jsonText),
+    "json.decoder.convert, $message",
+  );
+  Expect.throwsFormatException(
+    () => utf8.decoder.fuse(json.decoder).convert(utf8.encode(jsonText)),
+    "utf8.decoder.fuse(json.decoder) o utf.encode, $message",
+  );
 }
 
 testNumbers() {
@@ -255,7 +273,9 @@ testNumbers() {
 
 testStrings() {
   // String parser accepts and understands escapes.
-  var input = r'"\u0000\uffff\n\r\f\t\b\/\\\"' '\x20\ufffd\uffff"';
+  var input =
+      r'"\u0000\uffff\n\r\f\t\b\/\\\"'
+      '\x20\ufffd\uffff"';
   var expected = "\u0000\uffff\n\r\f\t\b\/\\\"\x20\ufffd\uffff";
   testJson(input, expected);
   // Empty string.
@@ -314,8 +334,8 @@ testObjects() {
   testJson(r'{"x":42}', {"x": 42});
   testJson(r'{"x":{"x":{"x":42}}}', {
     "x": {
-      "x": {"x": 42}
-    }
+      "x": {"x": 42},
+    },
   });
   testJson(r'{"x":10,"x":42}', {"x": 42});
   testJson(r'{"":42}', {"": 42});
@@ -334,25 +354,31 @@ testObjects() {
 
 testArrays() {
   testJson(r'[]', []);
-  testJson(r'[1.1e1,"string",true,false,null,{}]',
-      [1.1e1, "string", true, false, null, {}]);
+  testJson(r'[1.1e1,"string",true,false,null,{}]', [
+    1.1e1,
+    "string",
+    true,
+    false,
+    null,
+    {},
+  ]);
   testJson(r'[[[[[[]]]],[[[]]],[[]]]]', [
     [
       [
         [
-          [[]]
-        ]
+          [[]],
+        ],
       ],
       [
-        [[]]
+        [[]],
       ],
-      [[]]
-    ]
+      [[]],
+    ],
   ]);
   testJson(r'[{},[{}],{"x":[]}]', [
     {},
     [{}],
-    {"x": []}
+    {"x": []},
   ]);
 
   testThrows(r'[1,,2]');
@@ -389,7 +415,7 @@ testWhitespace() {
   testJson('$v[${v}-2.2e2$v,$v{$v"key"$v:${v}true$v}$v,$v"ab"$v]$v', [
     -2.2e2,
     {"key": true},
-    "ab"
+    "ab",
   ]);
 
   // IE9 accepts invalid characters at the end, so some of these tests have been
diff --git a/tests/lib/convert/json_toEncodable_reviver_test.dart b/tests/lib/convert/json_toEncodable_reviver_test.dart
index 584300dc88d..e86803d7cd4 100644
--- a/tests/lib/convert/json_toEncodable_reviver_test.dart
+++ b/tests/lib/convert/json_toEncodable_reviver_test.dart
@@ -20,13 +20,15 @@ reviver(key, value) {
   return value;
 }
 
-const extendedJson =
-    const JsonCodec(toEncodable: toEncodable, reviver: reviver);
+const extendedJson = const JsonCodec(
+  toEncodable: toEncodable,
+  reviver: reviver,
+);
 
 main() {
   var encoded = extendedJson.encode([
     new A(0),
-    {"2": new A(1)}
+    {"2": new A(1)},
   ]);
   Expect.equals('[{"A":0},{"2":{"A":1}}]', encoded);
   var decoded = extendedJson.decode(encoded);
diff --git a/tests/lib/convert/json_unicode_tests.dart b/tests/lib/convert/json_unicode_tests.dart
index 5403c619538..331b1b90737 100644
--- a/tests/lib/convert/json_unicode_tests.dart
+++ b/tests/lib/convert/json_unicode_tests.dart
@@ -39,8 +39,8 @@ _expandUnicodeTests() {
     // For example: 'abcd' -> '[[["abcd"]]]'.
     var listExpected = [
       [
-        [string]
-      ]
+        [string],
+      ],
     ];
     var inListBytes = <int>[];
     inListBytes.addAll([_bracketOpen, _bracketOpen, _bracketOpen]);
diff --git a/tests/lib/convert/json_utf8_chunk_test.dart b/tests/lib/convert/json_utf8_chunk_test.dart
index e75019d3e99..589fa592ecc 100644
--- a/tests/lib/convert/json_utf8_chunk_test.dart
+++ b/tests/lib/convert/json_utf8_chunk_test.dart
@@ -20,9 +20,14 @@ main() {
 // Create an UTF-8 sink from a chunked JSON decoder, then let [action]
 // put data into it, and check that what comes out is equal to [expect].
 void jsonTest(testName, expect, action(sink), [bool allowMalformed = false]) {
-  jsonParse(testName, (value) {
-    Expect.equals(expect, value, "$testName:$value");
-  }, action, allowMalformed);
+  jsonParse(
+    testName,
+    (value) {
+      Expect.equals(expect, value, "$testName:$value");
+    },
+    action,
+    allowMalformed,
+  );
 }
 
 void jsonParse(testName, check, action, [bool allowMalformed = false]) {
@@ -30,8 +35,9 @@ void jsonParse(testName, check, action, [bool allowMalformed = false]) {
     var value = values[0];
     check(value);
   });
-  var decoderSink =
-      json.decoder.startChunkedConversion(sink).asUtf8Sink(allowMalformed);
+  var decoderSink = json.decoder
+      .startChunkedConversion(sink)
+      .asUtf8Sink(allowMalformed);
   try {
     action(decoderSink);
   } on FormatException catch (e, s) {
@@ -43,10 +49,12 @@ void jsonParse(testName, check, action, [bool allowMalformed = false]) {
 void testStrings() {
   // String literal containing characters, all escape types,
   // and a number of UTF-8 encoded characters.
-  var s = r'"abc\f\ndef\r\t\b\"\/\\\u0001\u9999\uffff'
+  var s =
+      r'"abc\f\ndef\r\t\b\"\/\\\u0001\u9999\uffff'
       '\x7f\xc2\x80\xdf\xbf\xe0\xa0\x80\xef\xbf\xbf'
       '\xf0\x90\x80\x80\xf4\x8f\xbf\xbf"'; // UTF-8.
-  var expected = "abc\f\ndef\r\t\b\"\/\\\u0001\u9999\uffff"
+  var expected =
+      "abc\f\ndef\r\t\b\"\/\\\u0001\u9999\uffff"
       "\x7f\x80\u07ff\u0800\uffff"
       "\u{10000}\u{10ffff}";
   for (var i = 1; i < s.length - 1; i++) {
@@ -84,7 +92,7 @@ void testNumbers() {
     "9",
     "1234.56789123456701418035663664340972900390625",
     "1.2345678912345671e-14",
-    "9223372036854775807"
+    "9223372036854775807",
   ]) {
     var expected = num.parse(number);
     for (int i = 1; i < number.length - 1; i++) {
@@ -200,8 +208,9 @@ void jsonMalformedTest(name, expect, codes) {
         var value = values[0];
         Expect.equals(expect, value, tag);
       });
-      var decoderSink =
-          json.decoder.startChunkedConversion(sink).asUtf8Sink(true);
+      var decoderSink = json.decoder
+          .startChunkedConversion(sink)
+          .asUtf8Sink(true);
       try {
         action(decoderSink);
       } catch (e, s) {
@@ -213,11 +222,16 @@ void jsonMalformedTest(name, expect, codes) {
       var sink = new ChunkedConversionSink.withCallback((values) {
         Expect.fail(tag);
       });
-      var decoderSink =
-          json.decoder.startChunkedConversion(sink).asUtf8Sink(false);
-      Expect.throws(() {
-        action(decoderSink);
-      }, (_) => true, tag);
+      var decoderSink = json.decoder
+          .startChunkedConversion(sink)
+          .asUtf8Sink(false);
+      Expect.throws(
+        () {
+          action(decoderSink);
+        },
+        (_) => true,
+        tag,
+      );
     }
   }
 
@@ -251,11 +265,16 @@ void jsonThrows(String name, String codeString) {
     var sink = new ChunkedConversionSink.withCallback((values) {
       Expect.fail(tag);
     });
-    var decoderSink =
-        json.decoder.startChunkedConversion(sink).asUtf8Sink(true);
-    Expect.throws(() {
-      action(decoderSink);
-    }, (_) => true, tag);
+    var decoderSink = json.decoder
+        .startChunkedConversion(sink)
+        .asUtf8Sink(true);
+    Expect.throws(
+      () {
+        action(decoderSink);
+      },
+      (_) => true,
+      tag,
+    );
   }
 
   var codes = codeString.codeUnits;
@@ -283,103 +302,350 @@ void jsonThrows(String name, String codeString) {
 // Malformed UTF-8 encodings.
 void testMalformed() {
   // Overlong encodings.
-  jsonMalformedTest(
-      "overlong-0-2", "@\uFFFD\uFFFD@", [0x22, 0x40, 0xc0, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("overlong-0-3", "@\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xe0, 0x80, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("overlong-0-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xf0, 0x80, 0x80, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("overlong-0-2", "@\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xc0,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("overlong-0-3", "@\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xe0,
+    0x80,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("overlong-0-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0x80,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest(
-      "overlong-7f-2", "@\uFFFD\uFFFD@", [0x22, 0x40, 0xc1, 0xbf, 0x40, 0x22]);
-  jsonMalformedTest("overlong-7f-3", "@\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xe0, 0x81, 0xbf, 0x40, 0x22]);
-  jsonMalformedTest("overlong-7f-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xf0, 0x80, 0x81, 0xbf, 0x40, 0x22]);
+  jsonMalformedTest("overlong-7f-2", "@\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xc1,
+    0xbf,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("overlong-7f-3", "@\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xe0,
+    0x81,
+    0xbf,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("overlong-7f-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0x81,
+    0xbf,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("overlong-80-3", "@\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xe0, 0x82, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("overlong-80-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xf0, 0x80, 0x82, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("overlong-80-3", "@\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xe0,
+    0x82,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("overlong-80-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0x82,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("overlong-7ff-3", "@\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xe0, 0x9f, 0xbf, 0x40, 0x22]);
-  jsonMalformedTest("overlong-7ff-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xf0, 0x80, 0x9f, 0xbf, 0x40, 0x22]);
+  jsonMalformedTest("overlong-7ff-3", "@\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xe0,
+    0x9f,
+    0xbf,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("overlong-7ff-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0x9f,
+    0xbf,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("overlong-800-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xf0, 0x80, 0xa0, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("overlong-ffff-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xf0, 0x8f, 0xbf, 0xbf, 0x40, 0x22]);
+  jsonMalformedTest("overlong-800-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0xa0,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("overlong-ffff-4", "@\uFFFD\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x8f,
+    0xbf,
+    0xbf,
+    0x40,
+    0x22,
+  ]);
 
   // Unterminated multibyte sequences.
-  jsonMalformedTest(
-      "unterminated-2-normal", "@\uFFFD@", [0x22, 0x40, 0xc0, 0x40, 0x22]);
+  jsonMalformedTest("unterminated-2-normal", "@\uFFFD@", [
+    0x22,
+    0x40,
+    0xc0,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("unterminated-3-normal", "@\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xe0, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("unterminated-3-normal", "@\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xe0,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("unterminated-4-normal", "@\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0xf0, 0x80, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("unterminated-4-normal", "@\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("unterminated-2-multi", "@\uFFFD\x80@",
-      [0x22, 0x40, 0xc0, 0xc2, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("unterminated-2-multi", "@\uFFFD\x80@", [
+    0x22,
+    0x40,
+    0xc0,
+    0xc2,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("unterminated-3-multi", "@\uFFFD\uFFFD\x80@",
-      [0x22, 0x40, 0xe0, 0x80, 0xc2, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("unterminated-3-multi", "@\uFFFD\uFFFD\x80@", [
+    0x22,
+    0x40,
+    0xe0,
+    0x80,
+    0xc2,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("unterminated-4-multi", "@\uFFFD\uFFFD\uFFFD\x80@",
-      [0x22, 0x40, 0xf0, 0x80, 0x80, 0xc2, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("unterminated-4-multi", "@\uFFFD\uFFFD\uFFFD\x80@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0x80,
+    0xc2,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("unterminated-2-escape", "@\uFFFD\n@",
-      [0x22, 0x40, 0xc0, 0x5c, 0x6e, 0x40, 0x22]);
+  jsonMalformedTest("unterminated-2-escape", "@\uFFFD\n@", [
+    0x22,
+    0x40,
+    0xc0,
+    0x5c,
+    0x6e,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("unterminated-3-escape", "@\uFFFD\uFFFD\n@",
-      [0x22, 0x40, 0xe0, 0x80, 0x5c, 0x6e, 0x40, 0x22]);
+  jsonMalformedTest("unterminated-3-escape", "@\uFFFD\uFFFD\n@", [
+    0x22,
+    0x40,
+    0xe0,
+    0x80,
+    0x5c,
+    0x6e,
+    0x40,
+    0x22,
+  ]);
 
-  jsonMalformedTest("unterminated-4-escape", "@\uFFFD\uFFFD\uFFFD\n@",
-      [0x22, 0x40, 0xf0, 0x80, 0x80, 0x5c, 0x6e, 0x40, 0x22]);
+  jsonMalformedTest("unterminated-4-escape", "@\uFFFD\uFFFD\uFFFD\n@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0x80,
+    0x5c,
+    0x6e,
+    0x40,
+    0x22,
+  ]);
 
   jsonMalformedTest("unterminated-2-end", "@\uFFFD", [0x22, 0x40, 0xc0, 0x22]);
 
-  jsonMalformedTest(
-      "unterminated-3-end", "@\uFFFD\uFFFD", [0x22, 0x40, 0xe0, 0x80, 0x22]);
+  jsonMalformedTest("unterminated-3-end", "@\uFFFD\uFFFD", [
+    0x22,
+    0x40,
+    0xe0,
+    0x80,
+    0x22,
+  ]);
 
-  jsonMalformedTest("unterminated-4-end", "@\uFFFD\uFFFD\uFFFD",
-      [0x22, 0x40, 0xf0, 0x80, 0x80, 0x22]);
+  jsonMalformedTest("unterminated-4-end", "@\uFFFD\uFFFD\uFFFD", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0x80,
+    0x22,
+  ]);
 
   // Unexpected continuation byte
   // - after a normal character.
-  jsonMalformedTest(
-      "continuation-normal", "@\uFFFD@", [0x22, 0x40, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("continuation-normal", "@\uFFFD@", [
+    0x22,
+    0x40,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
   // - after a valid continuation byte.
-  jsonMalformedTest("continuation-continuation-2", "@\x80\uFFFD@",
-      [0x22, 0x40, 0xc2, 0x80, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("continuation-continuation-3", "@\u0800\uFFFD@",
-      [0x22, 0x40, 0xe0, 0xa0, 0x80, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("continuation-continuation-4", "@\u{10000}\uFFFD@",
-      [0x22, 0x40, 0xf0, 0x90, 0x80, 0x80, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("continuation-continuation-2", "@\x80\uFFFD@", [
+    0x22,
+    0x40,
+    0xc2,
+    0x80,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("continuation-continuation-3", "@\u0800\uFFFD@", [
+    0x22,
+    0x40,
+    0xe0,
+    0xa0,
+    0x80,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("continuation-continuation-4", "@\u{10000}\uFFFD@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x90,
+    0x80,
+    0x80,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
   // - after another invalid continuation byte
-  jsonMalformedTest("continuation-twice", "@\uFFFD\uFFFD\uFFFD@",
-      [0x22, 0x40, 0x80, 0x80, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("continuation-twice", "@\uFFFD\uFFFD\uFFFD@", [
+    0x22,
+    0x40,
+    0x80,
+    0x80,
+    0x80,
+    0x40,
+    0x22,
+  ]);
   // - at start.
   jsonMalformedTest("continuation-start", "\uFFFD@", [0x22, 0x80, 0x40, 0x22]);
 
   // Unexpected leading byte where continuation byte expected.
-  jsonMalformedTest(
-      "leading-2", "@\uFFFD\x80@", [0x22, 0x40, 0xc0, 0xc2, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("leading-3-1", "@\uFFFD\x80@",
-      [0x22, 0x40, 0xe0, 0xc2, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("leading-3-2", "@\uFFFD\uFFFD\x80@",
-      [0x22, 0x40, 0xe0, 0x80, 0xc2, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("leading-4-1", "@\uFFFD\x80@",
-      [0x22, 0x40, 0xf0, 0xc2, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("leading-4-2", "@\uFFFD\uFFFD\x80@",
-      [0x22, 0x40, 0xf0, 0x80, 0xc2, 0x80, 0x40, 0x22]);
-  jsonMalformedTest("leading-4-3", "@\uFFFD\uFFFD\uFFFD\x80@",
-      [0x22, 0x40, 0xf0, 0x80, 0x80, 0xc2, 0x80, 0x40, 0x22]);
+  jsonMalformedTest("leading-2", "@\uFFFD\x80@", [
+    0x22,
+    0x40,
+    0xc0,
+    0xc2,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("leading-3-1", "@\uFFFD\x80@", [
+    0x22,
+    0x40,
+    0xe0,
+    0xc2,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("leading-3-2", "@\uFFFD\uFFFD\x80@", [
+    0x22,
+    0x40,
+    0xe0,
+    0x80,
+    0xc2,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("leading-4-1", "@\uFFFD\x80@", [
+    0x22,
+    0x40,
+    0xf0,
+    0xc2,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("leading-4-2", "@\uFFFD\uFFFD\x80@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0xc2,
+    0x80,
+    0x40,
+    0x22,
+  ]);
+  jsonMalformedTest("leading-4-3", "@\uFFFD\uFFFD\uFFFD\x80@", [
+    0x22,
+    0x40,
+    0xf0,
+    0x80,
+    0x80,
+    0xc2,
+    0x80,
+    0x40,
+    0x22,
+  ]);
 
   // Overlong encodings of ASCII outside of strings always fail.
   // Use Latin-1 strings as argument since most chars are correct,
diff --git a/tests/lib/convert/json_utf8_test.dart b/tests/lib/convert/json_utf8_test.dart
index beb6c999116..9610f3cbcad 100644
--- a/tests/lib/convert/json_utf8_test.dart
+++ b/tests/lib/convert/json_utf8_test.dart
@@ -19,21 +19,22 @@ void main() {
 
     // String (0x22 = ") with UTF-8 encoded Unicode characters.
     Expect.equals(
-        "A\xff\u1234\u{65555}",
-        parse([
-          0x22,
-          0x41,
-          0xc3,
-          0xbf,
-          0xe1,
-          0x88,
-          0xb4,
-          0xf1,
-          0xa5,
-          0x95,
-          0x95,
-          0x22
-        ]));
+      "A\xff\u1234\u{65555}",
+      parse([
+        0x22,
+        0x41,
+        0xc3,
+        0xbf,
+        0xe1,
+        0x88,
+        0xb4,
+        0xf1,
+        0xa5,
+        0x95,
+        0x95,
+        0x22,
+      ]),
+    );
 
     // BOM followed by true.
     Expect.isTrue(parse([0xEF, 0xBB, 0xBF, 0x74, 0x72, 0x75, 0x65]));
@@ -41,18 +42,22 @@ void main() {
 
   // Do not accept BOM in non-UTF-8 decoder.
   Expect.throws<FormatException>(
-      () => new JsonDecoder().convert("\xEF\xBB\xBFtrue"));
+    () => new JsonDecoder().convert("\xEF\xBB\xBFtrue"),
+  );
   Expect.throws<FormatException>(() => new JsonDecoder().convert("\uFEFFtrue"));
 
   // Only accept BOM first.
   Expect.throws<FormatException>(
-      () => parseFuse(" \xEF\xBB\xBFtrue".codeUnits.toList()));
+    () => parseFuse(" \xEF\xBB\xBFtrue".codeUnits.toList()),
+  );
   // Only accept BOM first.
   Expect.throws<FormatException>(
-      () => parseFuse(" true\xEF\xBB\xBF".codeUnits.toList()));
+    () => parseFuse(" true\xEF\xBB\xBF".codeUnits.toList()),
+  );
 
   Expect.throws<FormatException>(
-      () => parseFuse(" [\xEF\xBB\xBF]".codeUnits.toList()));
+    () => parseFuse(" [\xEF\xBB\xBF]".codeUnits.toList()),
+  );
 
   // Regression test for dartbug.com/46205
   // Bug occurs in sound null safe mode only.
@@ -69,10 +74,13 @@ Object? parseSequence(List<int> text) {
 
 Object? parseChunked(List<int> text) {
   var result;
-  var sink = new Utf8Decoder().fuse(new JsonDecoder()).startChunkedConversion(
-      new ChunkedConversionSink.withCallback((List<Object?> values) {
-    result = values[0];
-  }));
+  var sink = new Utf8Decoder()
+      .fuse(new JsonDecoder())
+      .startChunkedConversion(
+        new ChunkedConversionSink.withCallback((List<Object?> values) {
+          result = values[0];
+        }),
+      );
   for (var i = 0; i < text.length; i++) {
     sink.add([text[i]]);
   }
diff --git a/tests/lib/convert/json_util_test.dart b/tests/lib/convert/json_util_test.dart
index bf945f9f17b..210e8bd02fc 100644
--- a/tests/lib/convert/json_util_test.dart
+++ b/tests/lib/convert/json_util_test.dart
@@ -82,8 +82,10 @@ void testParse() {
   // Maps.
   Expect.mapEquals({}, json.decode(' {} '));
   Expect.mapEquals({"key": "value"}, json.decode(' {"key": "value" } '));
-  Expect.mapEquals(
-      {"key1": 1, "key2": 2}, json.decode(' {"key1": 1, "key2": 2} '));
+  Expect.mapEquals({
+    "key1": 1,
+    "key2": 2,
+  }, json.decode(' {"key1": 1, "key2": 2} '));
   Expect.mapEquals({"key1": 1}, json.decode(' { "key1" : 1 } '));
 }
 
@@ -171,8 +173,12 @@ void testEscaping() {
   Expect.stringEquals('"\\u001f"', json.encode('\u001f'));
   Expect.stringEquals('"\\\""', json.encode('"'));
   Expect.stringEquals('"\\\\"', json.encode('\\'));
-  Expect.stringEquals('"Got \\b, \\f, \\n, \\r, \\t, \\u0000, \\\\, and \\"."',
-      json.encode('Got \b, \f, \n, \r, \t, \u0000, \\, and ".'));
-  Expect.stringEquals('"Got \\b\\f\\n\\r\\t\\u0000\\\\\\"."',
-      json.encode('Got \b\f\n\r\t\u0000\\".'));
+  Expect.stringEquals(
+    '"Got \\b, \\f, \\n, \\r, \\t, \\u0000, \\\\, and \\"."',
+    json.encode('Got \b, \f, \n, \r, \t, \u0000, \\, and ".'),
+  );
+  Expect.stringEquals(
+    '"Got \\b\\f\\n\\r\\t\\u0000\\\\\\"."',
+    json.encode('Got \b\f\n\r\t\u0000\\".'),
+  );
 }
diff --git a/tests/lib/convert/latin1_test.dart b/tests/lib/convert/latin1_test.dart
index 3ca055b0c88..21fb1fcaf5f 100644
--- a/tests/lib/convert/latin1_test.dart
+++ b/tests/lib/convert/latin1_test.dart
@@ -41,9 +41,13 @@ void testDirectConversions() {
     }
 
     for (var nonLatin1String in nonLatin1Strings) {
-      Expect.throws(() {
-        print(codec.encoder.convert(nonLatin1String));
-      }, (_) => true, nonLatin1String);
+      Expect.throws(
+        () {
+          print(codec.encoder.convert(nonLatin1String));
+        },
+        (_) => true,
+        nonLatin1String,
+      );
     }
 
     var encode = codec.encoder.convert;
@@ -104,7 +108,10 @@ void testDirectConversions() {
 }
 
 List<int> encode(
-    String str, int chunkSize, Converter<String, List<int>> converter) {
+  String str,
+  int chunkSize,
+  Converter<String, List<int>> converter,
+) {
   List<int> bytes = <int>[];
   var byteSink = new ByteConversionSink.withCallback(bytes.addAll);
   var stringConversionSink = converter.startChunkedConversion(byteSink);
@@ -120,7 +127,10 @@ List<int> encode(
 }
 
 String decode(
-    List<int> bytes, int chunkSize, Converter<List<int>, String> converter) {
+  List<int> bytes,
+  int chunkSize,
+  Converter<List<int>, String> converter,
+) {
   StringBuffer buf = new StringBuffer();
   var stringSink = new StringConversionSink.fromStringSink(buf);
   var byteConversionSink = converter.startChunkedConversion(stringSink);
@@ -140,7 +150,7 @@ void testChunkedConversions() {
   for (var converter in [
     latin1.encoder,
     new Latin1Codec().encoder,
-    new Latin1Encoder()
+    new Latin1Encoder(),
   ]) {
     for (int chunkSize in [1, 2, 5, 50]) {
       for (var latin1String in latin1Strings) {
@@ -159,7 +169,7 @@ void testChunkedConversions() {
   for (var converter in [
     latin1.decoder,
     new Latin1Codec().decoder,
-    new Latin1Decoder()
+    new Latin1Decoder(),
   ]) {
     for (int chunkSize in [1, 2, 5, 50]) {
       for (var latin1String in latin1Strings) {
diff --git a/tests/lib/convert/line_splitter_performance_test.dart b/tests/lib/convert/line_splitter_performance_test.dart
index 7d23f8e1c79..6f88ac8c893 100644
--- a/tests/lib/convert/line_splitter_performance_test.dart
+++ b/tests/lib/convert/line_splitter_performance_test.dart
@@ -22,15 +22,16 @@ void testEfficiency() {
   // Before fix, with N = 100000, took 25 seconds.
   const N = 1000000;
   String result = ""; // Starts empty, set once.
-  var sink = LineSplitter()
-      .startChunkedConversion(ChunkedConversionSink.withCallback((lines) {
-    // Gets called only once with exactly one line.
-    Expect.equals("", result);
-    Expect.equals(1, lines.length);
-    var line = lines.first;
-    Expect.notEquals("", line);
-    result = line;
-  }));
+  var sink = LineSplitter().startChunkedConversion(
+    ChunkedConversionSink.withCallback((lines) {
+      // Gets called only once with exactly one line.
+      Expect.equals("", result);
+      Expect.equals(1, lines.length);
+      var line = lines.first;
+      Expect.notEquals("", line);
+      result = line;
+    }),
+  );
   for (var i = 0; i < N; i++) {
     sink.add("xy");
   }
diff --git a/tests/lib/convert/line_splitter_test.dart b/tests/lib/convert/line_splitter_test.dart
index 18b466c6bee..261467e526c 100644
--- a/tests/lib/convert/line_splitter_test.dart
+++ b/tests/lib/convert/line_splitter_test.dart
@@ -44,8 +44,9 @@ void testManyLines() {
 
 String _getLinesSliced(String str) {
   late String lines;
-  var stringSink =
-      new StringConversionSink.withCallback((result) => lines = result);
+  var stringSink = new StringConversionSink.withCallback(
+    (result) => lines = result,
+  );
   var sink = new LineSplitter().startChunkedConversion(stringSink);
 
   const chunkSize = 3;
@@ -74,14 +75,25 @@ void testSimpleConvert() {
   var test = "Line1\nLine2\r\nLine3\rLine4\n\n\n\r\n\r\n\r\r";
   var result = decoder.convert(test);
 
-  Expect.listEquals(
-      ['Line1', 'Line2', 'Line3', 'Line4', '', '', '', '', '', ''], result);
+  Expect.listEquals([
+    'Line1',
+    'Line2',
+    'Line3',
+    'Line4',
+    '',
+    '',
+    '',
+    '',
+    '',
+    '',
+  ], result);
 }
 
 void testReadLine1() {
   var controller = new StreamController<List<int>>(sync: true);
-  var stream =
-      controller.stream.transform(utf8.decoder).transform(const LineSplitter());
+  var stream = controller.stream
+      .transform(utf8.decoder)
+      .transform(const LineSplitter());
 
   var stage = 0;
   var done = false;
@@ -108,8 +120,9 @@ void testReadLine1() {
 void testReadLine2() {
   var controller = new StreamController<List<int>>(sync: true);
 
-  var stream =
-      controller.stream.transform(utf8.decoder).transform(const LineSplitter());
+  var stream = controller.stream
+      .transform(utf8.decoder)
+      .transform(const LineSplitter());
 
   var expectedLines = [
     'Line1',
@@ -123,7 +136,7 @@ void testReadLine2() {
     '',
     '',
     'Line5',
-    'Line6'
+    'Line6',
   ];
 
   var index = 0;
@@ -152,8 +165,18 @@ void testSplit() {
   var test = "Line1\nLine2\r\nLine3\rLine4\n\n\n\r\n\r\n\r\r";
   var result = LineSplitter.split(test).toList();
 
-  Expect.listEquals(
-      ['Line1', 'Line2', 'Line3', 'Line4', '', '', '', '', '', ''], result);
+  Expect.listEquals([
+    'Line1',
+    'Line2',
+    'Line3',
+    'Line4',
+    '',
+    '',
+    '',
+    '',
+    '',
+    '',
+  ], result);
 }
 
 void testSplitWithOffsets() {
@@ -182,8 +205,18 @@ void testSplitWithOffsets() {
 
   var result = LineSplitter.split(test).toList();
 
-  Expect.listEquals(
-      ['Line1', 'Line2', 'Line3', 'Line4', '', '', '', '', '', ''], result);
+  Expect.listEquals([
+    'Line1',
+    'Line2',
+    'Line3',
+    'Line4',
+    '',
+    '',
+    '',
+    '',
+    '',
+    '',
+  ], result);
 
   test = "a\n\nb\r\nc\n\rd\r\re\r\n\nf\r\n";
   result = LineSplitter.split(test).toList();
@@ -210,8 +243,9 @@ void testChunkedConversion() {
     for (int j = i; j < test.length; j++) {
       var output = [];
       var splitter = new LineSplitter();
-      var outSink =
-          new ChunkedConversionSink<String>.withCallback(output.addAll);
+      var outSink = new ChunkedConversionSink<String>.withCallback(
+        output.addAll,
+      );
       var sink = splitter.startChunkedConversion(outSink);
       sink.addSlice(test, 0, i, false);
       sink.addSlice(test, i, j, false);
diff --git a/tests/lib/convert/negative_utf8_codeunit_test.dart b/tests/lib/convert/negative_utf8_codeunit_test.dart
index bfa3dff9a2e..6f5e735ab6e 100644
--- a/tests/lib/convert/negative_utf8_codeunit_test.dart
+++ b/tests/lib/convert/negative_utf8_codeunit_test.dart
@@ -43,9 +43,10 @@ void main() {
 
     final stringSink = StringSink();
     Expect.throwsFormatException(
-        () => utf8.decoder.startChunkedConversion(stringSink)
-          ..add(bytes)
-          ..close());
+      () => utf8.decoder.startChunkedConversion(stringSink)
+        ..add(bytes)
+        ..close(),
+    );
   }
 }
 
diff --git a/tests/lib/convert/streamed_conversion_json_decode1_test.dart b/tests/lib/convert/streamed_conversion_json_decode1_test.dart
index 68a8a6b88a6..d83ed4562ac 100644
--- a/tests/lib/convert/streamed_conversion_json_decode1_test.dart
+++ b/tests/lib/convert/streamed_conversion_json_decode1_test.dart
@@ -19,42 +19,42 @@ final TESTS = [
   [[], "[]"],
   [
     [3, -4.5, true, "hi", false],
-    '[3,-4.5,true,"hi",false]'
+    '[3,-4.5,true,"hi",false]',
   ],
   [
     [null],
-    "[null]"
+    "[null]",
   ],
   [
     [
-      [null]
+      [null],
     ],
-    "[[null]]"
+    "[[null]]",
   ],
   [
     [
-      [3]
+      [3],
     ],
-    "[[3]]"
+    "[[3]]",
   ],
   [{}, "{}"],
   [
     {"x": 3, "y": 4.5, "z": "hi", "u": true, "v": false},
-    '{"x":3,"y":4.5,"z":"hi","u":true,"v":false}'
+    '{"x":3,"y":4.5,"z":"hi","u":true,"v":false}',
   ],
   [
     {"x": null},
-    '{"x":null}'
+    '{"x":null}',
   ],
   [
     {"x": {}},
-    '{"x":{}}'
+    '{"x":{}}',
   ],
   // Note that -0.0 won't be treated the same in JS. The Json spec seems to
   // allow it, though.
   [
     {"hi there": 499, "'": -0.0},
-    '{"hi there":499,"\'":-0.0}'
+    '{"hi there":499,"\'":-0.0}',
   ],
   [r'\foo', r'"\\foo"'],
 ];
@@ -83,10 +83,12 @@ bool isJsonEqual(o1, o2) {
 Stream<Object?> createStream(List<String> chunks) {
   var decoder = new JsonDecoder(null);
   var controller;
-  controller = new StreamController<String>(onListen: () {
-    chunks.forEach(controller.add);
-    controller.close();
-  });
+  controller = new StreamController<String>(
+    onListen: () {
+      chunks.forEach(controller.add);
+      controller.close();
+    },
+  );
   return controller.stream.transform(decoder);
 }
 
@@ -110,14 +112,15 @@ void main() {
   var tests = TESTS.expand((test) {
     var object = test[0];
     var string = test[1];
-    var longString = "                                                        "
+    var longString =
+        "                                                        "
         "                                                        "
         "$string"
         "                                                        "
         "                                                        ";
     return [
       test,
-      [object, longString]
+      [object, longString],
     ];
   });
   for (var test in tests) {
diff --git a/tests/lib/convert/streamed_conversion_json_encode1_test.dart b/tests/lib/convert/streamed_conversion_json_encode1_test.dart
index 8653e3b5a9d..b925ce7742e 100644
--- a/tests/lib/convert/streamed_conversion_json_encode1_test.dart
+++ b/tests/lib/convert/streamed_conversion_json_encode1_test.dart
@@ -19,42 +19,42 @@ final TESTS = [
   [[], "[]"],
   [
     [3, -4.5, true, "hi", false],
-    '[3,-4.5,true,"hi",false]'
+    '[3,-4.5,true,"hi",false]',
   ],
   [
     [null],
-    "[null]"
+    "[null]",
   ],
   [
     [
-      [null]
+      [null],
     ],
-    "[[null]]"
+    "[[null]]",
   ],
   [
     [
-      [3]
+      [3],
     ],
-    "[[3]]"
+    "[[3]]",
   ],
   [{}, "{}"],
   [
     {"x": 3, "y": 4.5, "z": "hi", "u": true, "v": false},
-    '{"x":3,"y":4.5,"z":"hi","u":true,"v":false}'
+    '{"x":3,"y":4.5,"z":"hi","u":true,"v":false}',
   ],
   [
     {"x": null},
-    '{"x":null}'
+    '{"x":null}',
   ],
   [
     {"x": {}},
-    '{"x":{}}'
+    '{"x":{}}',
   ],
   // Note that -0.0 won't be treated the same in JS. The Json spec seems to
   // allow it, though.
   [
     {"hi there": 499, "'": -0.0},
-    '{"hi there":499,"\'":-0.0}'
+    '{"hi there":499,"\'":-0.0}',
   ],
   [r'\foo', r'"\\foo"'],
 ];
@@ -62,10 +62,12 @@ final TESTS = [
 Stream<String> encode(Object? o) {
   var encoder = new JsonEncoder();
   late StreamController controller;
-  controller = new StreamController(onListen: () {
-    controller.add(o);
-    controller.close();
-  });
+  controller = new StreamController(
+    onListen: () {
+      controller.add(o);
+      controller.close();
+    },
+  );
   return controller.stream.transform(encoder);
 }
 
@@ -85,13 +87,16 @@ void testWithPause(String expected, Object? o) {
   Stream stream = encode(o);
   StringBuffer buffer = new StringBuffer();
   var sub;
-  sub = stream.listen((x) {
-    buffer.write(x);
-    sub.pause(new Future.delayed(Duration.zero));
-  }, onDone: () {
-    Expect.stringEquals(expected, buffer.toString());
-    asyncEnd();
-  });
+  sub = stream.listen(
+    (x) {
+      buffer.write(x);
+      sub.pause(new Future.delayed(Duration.zero));
+    },
+    onDone: () {
+      Expect.stringEquals(expected, buffer.toString());
+      asyncEnd();
+    },
+  );
 }
 
 void main() {
diff --git a/tests/lib/convert/streamed_conversion_json_utf8_decode_test.dart b/tests/lib/convert/streamed_conversion_json_utf8_decode_test.dart
index 6cdcdadf0a2..758e69c6cc8 100644
--- a/tests/lib/convert/streamed_conversion_json_utf8_decode_test.dart
+++ b/tests/lib/convert/streamed_conversion_json_utf8_decode_test.dart
@@ -40,10 +40,12 @@ void expectJsonEquals(o1, o2, [path = "result"]) {
 
 Stream<Object?> createStream(List<List<int>> chunks) {
   var controller;
-  controller = new StreamController<List<int>>(onListen: () {
-    chunks.forEach(controller.add);
-    controller.close();
-  });
+  controller = new StreamController<List<int>>(
+    onListen: () {
+      chunks.forEach(controller.add);
+      controller.close();
+    },
+  );
   return controller.stream.transform(jsonUtf8.decoder);
 }
 
diff --git a/tests/lib/convert/streamed_conversion_json_utf8_encode_test.dart b/tests/lib/convert/streamed_conversion_json_utf8_encode_test.dart
index f905ae9f55f..f3a2c5e61f6 100644
--- a/tests/lib/convert/streamed_conversion_json_utf8_encode_test.dart
+++ b/tests/lib/convert/streamed_conversion_json_utf8_encode_test.dart
@@ -12,10 +12,12 @@ final jsonUtf8 = json.fuse<List<int>>(utf8);
 
 Stream<List<int>> encode(Object o) {
   var controller;
-  controller = new StreamController(onListen: () {
-    controller.add(o);
-    controller.close();
-  });
+  controller = new StreamController(
+    onListen: () {
+      controller.add(o);
+      controller.close();
+    },
+  );
   return controller.stream.transform(jsonUtf8.encoder);
 }
 
@@ -33,13 +35,16 @@ void testWithPauses(List<int> expected, Stream<List<int>> stream) {
   asyncStart();
   var accumulated = <int>[];
   var sub;
-  sub = stream.listen((x) {
-    accumulated.addAll(x);
-    sub.pause(new Future.delayed(Duration.zero));
-  }, onDone: () {
-    Expect.listEquals(expected, accumulated);
-    asyncEnd();
-  });
+  sub = stream.listen(
+    (x) {
+      accumulated.addAll(x);
+      sub.pause(new Future.delayed(Duration.zero));
+    },
+    onDone: () {
+      Expect.listEquals(expected, accumulated);
+      asyncEnd();
+    },
+  );
 }
 
 void main() {
diff --git a/tests/lib/convert/streamed_conversion_utf8_decode_test.dart b/tests/lib/convert/streamed_conversion_utf8_decode_test.dart
index c319d0939b2..20b0ee1ed81 100644
--- a/tests/lib/convert/streamed_conversion_utf8_decode_test.dart
+++ b/tests/lib/convert/streamed_conversion_utf8_decode_test.dart
@@ -10,20 +10,22 @@ import "package:expect/async_helper.dart";
 
 Stream<String> decode(List<int> bytes, int chunkSize) {
   var controller;
-  controller = new StreamController<List<int>>(onListen: () {
-    int i = 0;
-    while (i < bytes.length) {
-      List nextChunk = <int>[];
-      for (int j = 0; j < chunkSize; j++) {
-        if (i < bytes.length) {
-          nextChunk.add(bytes[i]);
-          i++;
+  controller = new StreamController<List<int>>(
+    onListen: () {
+      int i = 0;
+      while (i < bytes.length) {
+        List nextChunk = <int>[];
+        for (int j = 0; j < chunkSize; j++) {
+          if (i < bytes.length) {
+            nextChunk.add(bytes[i]);
+            i++;
+          }
         }
+        controller.add(nextChunk);
       }
-      controller.add(nextChunk);
-    }
-    controller.close();
-  });
+      controller.close();
+    },
+  );
   return controller.stream.transform(utf8.decoder);
 }
 
@@ -41,13 +43,16 @@ testWithPauses(String expected, Stream stream) {
   asyncStart();
   StringBuffer buffer = new StringBuffer();
   var sub;
-  sub = stream.listen((x) {
-    buffer.write(x);
-    sub.pause(new Future.delayed(Duration.zero));
-  }, onDone: () {
-    Expect.stringEquals(expected, buffer.toString());
-    asyncEnd();
-  });
+  sub = stream.listen(
+    (x) {
+      buffer.write(x);
+      sub.pause(new Future.delayed(Duration.zero));
+    },
+    onDone: () {
+      Expect.stringEquals(expected, buffer.toString());
+      asyncEnd();
+    },
+  );
 }
 
 main() {
diff --git a/tests/lib/convert/streamed_conversion_utf8_encode_test.dart b/tests/lib/convert/streamed_conversion_utf8_encode_test.dart
index 04d19cf9689..16775276008 100644
--- a/tests/lib/convert/streamed_conversion_utf8_encode_test.dart
+++ b/tests/lib/convert/streamed_conversion_utf8_encode_test.dart
@@ -10,18 +10,20 @@ import "package:expect/async_helper.dart";
 
 Stream<List<int>> encode(String string, int chunkSize) {
   var controller;
-  controller = new StreamController<String>(onListen: () {
-    int i = 0;
-    while (i < string.length) {
-      if (i + chunkSize <= string.length) {
-        controller.add(string.substring(i, i + chunkSize));
-      } else {
-        controller.add(string.substring(i));
+  controller = new StreamController<String>(
+    onListen: () {
+      int i = 0;
+      while (i < string.length) {
+        if (i + chunkSize <= string.length) {
+          controller.add(string.substring(i, i + chunkSize));
+        } else {
+          controller.add(string.substring(i));
+        }
+        i += chunkSize;
       }
-      i += chunkSize;
-    }
-    controller.close();
-  });
+      controller.close();
+    },
+  );
   return controller.stream.transform(utf8.encoder);
 }
 
@@ -40,13 +42,16 @@ void testWithPauses(List<int> expected, Stream<List<int>> stream) {
   asyncStart();
   var combined = <int>[];
   var sub;
-  sub = stream.listen((x) {
-    combined.addAll(x);
-    sub.pause(new Future.delayed(Duration.zero));
-  }, onDone: () {
-    Expect.listEquals(expected, combined);
-    asyncEnd();
-  });
+  sub = stream.listen(
+    (x) {
+      combined.addAll(x);
+      sub.pause(new Future.delayed(Duration.zero));
+    },
+    onDone: () {
+      Expect.listEquals(expected, combined);
+      asyncEnd();
+    },
+  );
 }
 
 main() {
diff --git a/tests/lib/convert/unicode_tests.dart b/tests/lib/convert/unicode_tests.dart
index 82d7f17b8d9..acfea003ee2 100644
--- a/tests/lib/convert/unicode_tests.dart
+++ b/tests/lib/convert/unicode_tests.dart
@@ -45,7 +45,7 @@ const INTER_BYTES = const [
   0xbb,
   0x9d,
   0xc3,
-  0xb1
+  0xb1,
 ];
 const INTER_STRING = "Îñţérñåţîöñåļîžåţîờñ";
 
@@ -63,7 +63,7 @@ const BLUEBERRY_BYTES = const [
   0x72,
   0xc3,
   0xb8,
-  0x64
+  0x64,
 ];
 const BLUEBERRY_STRING = "blåbærgrød";
 
@@ -102,7 +102,7 @@ const SIVA_BYTES1 = const [
   0x88,
   0xe0,
   0xae,
-  0xb2
+  0xb2,
 ];
 const SIVA_STRING1 = "சிவா அணாமாைல";
 
@@ -141,7 +141,7 @@ const SIVA_BYTES2 = const [
   0xb2,
   0xe0,
   0xa5,
-  0x88
+  0x88,
 ];
 const SIVA_STRING2 = "िसवा अणामालै";
 
@@ -179,7 +179,7 @@ const ASCII_BYTES = const [
   0x77,
   0x78,
   0x79,
-  0x7A
+  0x7A,
 ];
 const ASCII_STRING = "abcdefghijklmnopqrstuvwxyz";
 
@@ -226,17 +226,19 @@ List<List> _expandTestPairs() {
   assert(2 == BEE_STRING.length);
   var tests = <List>[];
   tests.addAll(_TEST_PAIRS);
-  tests.addAll(_TEST_PAIRS.map((test) {
-    var bytes = test[0] as List<int>;
-    var string = test[1] as String;
-    var longBytes = <int>[];
-    var longString = "";
-    for (int i = 0; i < 100; i++) {
-      longBytes.addAll(bytes);
-      longString += string;
-    }
-    return [longBytes, longString];
-  }));
+  tests.addAll(
+    _TEST_PAIRS.map((test) {
+      var bytes = test[0] as List<int>;
+      var string = test[1] as String;
+      var longBytes = <int>[];
+      var longString = "";
+      for (int i = 0; i < 100; i++) {
+        longBytes.addAll(bytes);
+        longString += string;
+      }
+      return [longBytes, longString];
+    }),
+  );
   return tests;
 }
 
diff --git a/tests/lib/convert/utf82_test.dart b/tests/lib/convert/utf82_test.dart
index cf0c2b0585e..6b0ac1ca2ca 100644
--- a/tests/lib/convert/utf82_test.dart
+++ b/tests/lib/convert/utf82_test.dart
@@ -32,7 +32,7 @@ final TESTS0 = [
   // Unfinished UTF-8 sequences.
   [0xc3],
   [0xE2, 0x82],
-  [0xF0, 0xA4, 0xAD]
+  [0xF0, 0xA4, 0xAD],
 ];
 
 final TESTS1 = [
@@ -67,146 +67,146 @@ final TESTS2 = [
   // Test that 0xC0|1, 0x80 does not eat the next character.
   [
     [0xC0, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xC1, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   // 0xF5 .. 0xFF never appear in valid UTF-8 sequences.
   [
     [0xF5, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF6, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF7, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF8, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF9, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFA, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFB, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFC, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFD, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFE, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xFF, 0x80],
-    "XX"
+    "XX",
   ],
   [
     [0xF5, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF6, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF7, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF8, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xF9, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFA, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFB, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFC, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFD, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFE, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   [
     [0xFF, 0x80, 0x61],
-    "XXa"
+    "XXa",
   ],
   // Characters outside the valid range.
   [
     [0xF5, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF6, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF7, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF8, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xF9, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFA, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFB, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFC, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFD, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFE, 0x80, 0x80, 0x61],
-    "XXXa"
+    "XXXa",
   ],
   [
     [0xFF, 0x80, 0x80, 0x61],
-    "XXXa"
-  ]
+    "XXXa",
+  ],
 ];
 
 main() {
@@ -214,46 +214,47 @@ main() {
     // Pairs of test and expected string output when malformed strings are
     // allowed. Replacement character: U+FFFD, one per unfinished sequence or
     // undecodable byte.
-    String replacement =
-        TESTS0.contains(test) ? "\u{FFFD}" : "\u{FFFD}" * test.length;
+    String replacement = TESTS0.contains(test)
+        ? "\u{FFFD}"
+        : "\u{FFFD}" * test.length;
     return [
       [test, "${replacement}"],
       [
         [0x61, ...test],
-        "a${replacement}"
+        "a${replacement}",
       ],
       [
         [0x61, ...test, 0x61],
-        "a${replacement}a"
+        "a${replacement}a",
       ],
       [
         [...test, 0x61],
-        "${replacement}a"
+        "${replacement}a",
       ],
       [
         [...test, ...test],
-        "${replacement}${replacement}"
+        "${replacement}${replacement}",
       ],
       [
         [...test, 0x61, ...test],
-        "${replacement}a${replacement}"
+        "${replacement}a${replacement}",
       ],
       [
         [0xc3, 0xa5, ...test],
-        "å${replacement}"
+        "å${replacement}",
       ],
       [
         [0xc3, 0xa5, ...test, 0xc3, 0xa5],
-        "å${replacement}å"
+        "å${replacement}å",
       ],
       [
         [...test, 0xc3, 0xa5],
-        "${replacement}å"
+        "${replacement}å",
       ],
       [
         [...test, 0xc3, 0xa5, ...test],
-        "${replacement}å${replacement}"
-      ]
+        "${replacement}å${replacement}",
+      ],
     ];
   });
 
@@ -276,7 +277,10 @@ main() {
     Expect.equals(expected, decodeAllowMalformed4(bytes));
   }
 
-  for (var test in []..addAll(allTests)..addAll(allTests2)) {
+  for (var test
+      in []
+        ..addAll(allTests)
+        ..addAll(allTests2)) {
     List<int> bytes = test[0];
     String expected = test[1];
     check(expected, bytes, 'plain list');
diff --git a/tests/lib/convert/utf83_test.dart b/tests/lib/convert/utf83_test.dart
index 6972c115e4b..baea4ab1595 100644
--- a/tests/lib/convert/utf83_test.dart
+++ b/tests/lib/convert/utf83_test.dart
@@ -15,56 +15,79 @@ test(List<int> bytes(List<int> input)) {
   Expect.equals("a", utf8.decode(bytes([0xEF, 0xBB, 0xBF, 0x61])));
   Expect.equals("a", utf8.decoder.convert(bytes([0xEF, 0xBB, 0xBF, 0x61])));
   Expect.equals(
-      "a", new Utf8Decoder().convert(bytes([0xEF, 0xBB, 0xBF, 0x61])));
+    "a",
+    new Utf8Decoder().convert(bytes([0xEF, 0xBB, 0xBF, 0x61])),
+  );
   Expect.equals(
-      "a", utf8.decode(bytes([0xEF, 0xBB, 0xBF, 0x61]), allowMalformed: true));
+    "a",
+    utf8.decode(bytes([0xEF, 0xBB, 0xBF, 0x61]), allowMalformed: true),
+  );
   Expect.equals(
-      "a",
-      new Utf8Codec(allowMalformed: true)
-          .decode(bytes([0xEF, 0xBB, 0xBF, 0x61])));
+    "a",
+    new Utf8Codec(allowMalformed: true).decode(bytes([0xEF, 0xBB, 0xBF, 0x61])),
+  );
   Expect.equals(
-      "a",
-      new Utf8Codec(allowMalformed: true)
-          .decoder
-          .convert(bytes([0xEF, 0xBB, 0xBF, 0x61])));
+    "a",
+    new Utf8Codec(
+      allowMalformed: true,
+    ).decoder.convert(bytes([0xEF, 0xBB, 0xBF, 0x61])),
+  );
   Expect.equals(
-      "a",
-      new Utf8Decoder(allowMalformed: true)
-          .convert(bytes([0xEF, 0xBB, 0xBF, 0x61])));
+    "a",
+    new Utf8Decoder(
+      allowMalformed: true,
+    ).convert(bytes([0xEF, 0xBB, 0xBF, 0x61])),
+  );
   Expect.equals("", utf8.decode(bytes([0xEF, 0xBB, 0xBF])));
   Expect.equals("", utf8.decoder.convert(bytes([0xEF, 0xBB, 0xBF])));
   Expect.equals("", new Utf8Decoder().convert(bytes([0xEF, 0xBB, 0xBF])));
   Expect.equals(
-      "", utf8.decode(bytes([0xEF, 0xBB, 0xBF]), allowMalformed: true));
-  Expect.equals("",
-      new Utf8Codec(allowMalformed: true).decode(bytes([0xEF, 0xBB, 0xBF])));
+    "",
+    utf8.decode(bytes([0xEF, 0xBB, 0xBF]), allowMalformed: true),
+  );
   Expect.equals(
-      "",
-      new Utf8Codec(allowMalformed: true)
-          .decoder
-          .convert(bytes([0xEF, 0xBB, 0xBF])));
-  Expect.equals("",
-      new Utf8Decoder(allowMalformed: true).convert(bytes([0xEF, 0xBB, 0xBF])));
+    "",
+    new Utf8Codec(allowMalformed: true).decode(bytes([0xEF, 0xBB, 0xBF])),
+  );
+  Expect.equals(
+    "",
+    new Utf8Codec(
+      allowMalformed: true,
+    ).decoder.convert(bytes([0xEF, 0xBB, 0xBF])),
+  );
+  Expect.equals(
+    "",
+    new Utf8Decoder(allowMalformed: true).convert(bytes([0xEF, 0xBB, 0xBF])),
+  );
   Expect.equals("a\u{FEFF}", utf8.decode(bytes([0x61, 0xEF, 0xBB, 0xBF])));
   Expect.equals(
-      "a\u{FEFF}", utf8.decoder.convert(bytes([0x61, 0xEF, 0xBB, 0xBF])));
+    "a\u{FEFF}",
+    utf8.decoder.convert(bytes([0x61, 0xEF, 0xBB, 0xBF])),
+  );
   Expect.equals(
-      "a\u{FEFF}", new Utf8Decoder().convert(bytes([0x61, 0xEF, 0xBB, 0xBF])));
-  Expect.equals("a\u{FEFF}",
-      utf8.decode(bytes([0x61, 0xEF, 0xBB, 0xBF]), allowMalformed: true));
+    "a\u{FEFF}",
+    new Utf8Decoder().convert(bytes([0x61, 0xEF, 0xBB, 0xBF])),
+  );
   Expect.equals(
-      "a\u{FEFF}",
-      new Utf8Codec(allowMalformed: true)
-          .decode(bytes([0x61, 0xEF, 0xBB, 0xBF])));
+    "a\u{FEFF}",
+    utf8.decode(bytes([0x61, 0xEF, 0xBB, 0xBF]), allowMalformed: true),
+  );
   Expect.equals(
-      "a\u{FEFF}",
-      new Utf8Codec(allowMalformed: true)
-          .decoder
-          .convert(bytes([0x61, 0xEF, 0xBB, 0xBF])));
+    "a\u{FEFF}",
+    new Utf8Codec(allowMalformed: true).decode(bytes([0x61, 0xEF, 0xBB, 0xBF])),
+  );
   Expect.equals(
-      "a\u{FEFF}",
-      new Utf8Decoder(allowMalformed: true)
-          .convert(bytes([0x61, 0xEF, 0xBB, 0xBF])));
+    "a\u{FEFF}",
+    new Utf8Codec(
+      allowMalformed: true,
+    ).decoder.convert(bytes([0x61, 0xEF, 0xBB, 0xBF])),
+  );
+  Expect.equals(
+    "a\u{FEFF}",
+    new Utf8Decoder(
+      allowMalformed: true,
+    ).convert(bytes([0x61, 0xEF, 0xBB, 0xBF])),
+  );
 }
 
 main() {
diff --git a/tests/lib/convert/utf84_test.dart b/tests/lib/convert/utf84_test.dart
index 566b1fa54bd..444a0b3b34f 100755
--- a/tests/lib/convert/utf84_test.dart
+++ b/tests/lib/convert/utf84_test.dart
@@ -52,10 +52,11 @@ const List<int> testEnglishUtf8 = const <int>[
   0x64,
   0x6f,
   0x67,
-  0x2e
+  0x2e,
 ];
 
-const String testDanishPhrase = "Quizdeltagerne spiste jordbær med "
+const String testDanishPhrase =
+    "Quizdeltagerne spiste jordbær med "
     "fløde mens cirkusklovnen Wolther spillede på xylofon.";
 
 const List<int> testDanishUtf8 = const <int>[
@@ -148,7 +149,7 @@ const List<int> testDanishUtf8 = const <int>[
   0x66,
   0x6f,
   0x6e,
-  0x2e
+  0x2e,
 ];
 
 // unusual formatting due to strange editor interaction w/ text direction.
@@ -245,10 +246,11 @@ const List<int> testHebrewUtf8 = const <int>[
   0xd7,
   0x98,
   0xd7,
-  0x94
+  0x94,
 ];
 
-const String testRussianPhrase = "Съешь же ещё этих мягких "
+const String testRussianPhrase =
+    "Съешь же ещё этих мягких "
     "французских булок да выпей чаю";
 
 const List<int> testRussianUtf8 = const <int>[
@@ -352,10 +354,11 @@ const List<int> testRussianUtf8 = const <int>[
   0xd0,
   0xb0,
   0xd1,
-  0x8e
+  0x8e,
 ];
 
-const String testGreekPhrase = "Γαζέες καὶ μυρτιὲς δὲν θὰ βρῶ πιὰ "
+const String testGreekPhrase =
+    "Γαζέες καὶ μυρτιὲς δὲν θὰ βρῶ πιὰ "
     "στὸ χρυσαφὶ ξέφωτο";
 
 const List<int> testGreekUtf8 = const <int>[
@@ -461,10 +464,11 @@ const List<int> testGreekUtf8 = const <int>[
   0xcf,
   0x84,
   0xce,
-  0xbf
+  0xbf,
 ];
 
-const String testKatakanaPhrase = "イロハニホヘト チリヌルヲ ワカヨタレソ "
+const String testKatakanaPhrase =
+    "イロハニホヘト チリヌルヲ ワカヨタレソ "
     "ツネナラム ウヰノオクヤマ ケフコエテ アサキユメミシ ヱヒモセスン";
 
 const List<int> testKatakanaUtf8 = const <int>[
@@ -618,7 +622,7 @@ const List<int> testKatakanaUtf8 = const <int>[
   0xb9,
   0xe3,
   0x83,
-  0xb3
+  0xb3,
 ];
 
 void main() {
@@ -650,29 +654,48 @@ void testEncodeToUtf8() {
   List<int> encodeUtf8(String str) => utf8.encode(str);
 
   Expect.listEquals(
-      testEnglishUtf8, encodeUtf8(testEnglishPhrase), "english to utf8");
+    testEnglishUtf8,
+    encodeUtf8(testEnglishPhrase),
+    "english to utf8",
+  );
 
   Expect.listEquals(
-      testDanishUtf8, encodeUtf8(testDanishPhrase), "encode danish to utf8");
+    testDanishUtf8,
+    encodeUtf8(testDanishPhrase),
+    "encode danish to utf8",
+  );
 
   Expect.listEquals(
-      testHebrewUtf8, encodeUtf8(testHebrewPhrase), "Hebrew to utf8");
+    testHebrewUtf8,
+    encodeUtf8(testHebrewPhrase),
+    "Hebrew to utf8",
+  );
 
   Expect.listEquals(
-      testRussianUtf8, encodeUtf8(testRussianPhrase), "Russian to utf8");
+    testRussianUtf8,
+    encodeUtf8(testRussianPhrase),
+    "Russian to utf8",
+  );
 
   Expect.listEquals(
-      testGreekUtf8, encodeUtf8(testGreekPhrase), "Greek to utf8");
+    testGreekUtf8,
+    encodeUtf8(testGreekPhrase),
+    "Greek to utf8",
+  );
 
   Expect.listEquals(
-      testKatakanaUtf8, encodeUtf8(testKatakanaPhrase), "Katakana to utf8");
+    testKatakanaUtf8,
+    encodeUtf8(testKatakanaPhrase),
+    "Katakana to utf8",
+  );
 }
 
 void testUtf8bytesToCodepoints(List<int> utf8ToRunes(List<int> utf8)) {
   Expect.listEquals(
-      [954, 972, 963, 956, 949],
-      utf8ToRunes([0xce, 0xba, 0xcf, 0x8c, 0xcf, 0x83, 0xce, 0xbc, 0xce, 0xb5]),
-      "κόσμε");
+    [954, 972, 963, 956, 949],
+    utf8ToRunes([0xce, 0xba, 0xcf, 0x8c, 0xcf, 0x83, 0xce, 0xbc, 0xce, 0xb5]),
+    "κόσμε",
+  );
 
   // boundary conditions: First possible sequence of a certain length
   Expect.listEquals([], utf8ToRunes([]), "no input");
@@ -680,67 +703,103 @@ void testUtf8bytesToCodepoints(List<int> utf8ToRunes(List<int> utf8)) {
   Expect.listEquals([0x80], utf8ToRunes([0xc2, 0x80]), "80");
   Expect.listEquals([0x800], utf8ToRunes([0xe0, 0xa0, 0x80]), "800");
   Expect.listEquals([0x10000], utf8ToRunes([0xf0, 0x90, 0x80, 0x80]), "10000");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf8, 0x88, 0x80, 0x80, 0x80]), "200000");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfc, 0x84, 0x80, 0x80, 0x80, 0x80]), "4000000");
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf8, 0x88, 0x80, 0x80, 0x80]),
+    "200000",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfc, 0x84, 0x80, 0x80, 0x80, 0x80]),
+    "4000000",
+  );
 
   // boundary conditions: Last possible sequence of a certain length
   Expect.listEquals([0x7f], utf8ToRunes([0x7f]), "7f");
   Expect.listEquals([0x7ff], utf8ToRunes([0xdf, 0xbf]), "7ff");
   Expect.listEquals([0xffff], utf8ToRunes([0xef, 0xbf, 0xbf]), "ffff");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf7, 0xbf, 0xbf, 0xbf]), "1fffff");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfb, 0xbf, 0xbf, 0xbf, 0xbf]), "3ffffff");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfd, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf]), "4000000");
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf7, 0xbf, 0xbf, 0xbf]),
+    "1fffff",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfb, 0xbf, 0xbf, 0xbf, 0xbf]),
+    "3ffffff",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfd, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf]),
+    "4000000",
+  );
 
   // other boundary conditions
   Expect.listEquals([0xd7ff], utf8ToRunes([0xed, 0x9f, 0xbf]), "d7ff");
   Expect.listEquals([0xe000], utf8ToRunes([0xee, 0x80, 0x80]), "e000");
-  Expect.listEquals([unicodeReplacementCharacterRune],
-      utf8ToRunes([0xef, 0xbf, 0xbd]), "fffd");
   Expect.listEquals(
-      [0x10ffff], utf8ToRunes([0xf4, 0x8f, 0xbf, 0xbf]), "10ffff");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf4, 0x90, 0x80, 0x80]), "110000");
+    [unicodeReplacementCharacterRune],
+    utf8ToRunes([0xef, 0xbf, 0xbd]),
+    "fffd",
+  );
+  Expect.listEquals(
+    [0x10ffff],
+    utf8ToRunes([0xf4, 0x8f, 0xbf, 0xbf]),
+    "10ffff",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf4, 0x90, 0x80, 0x80]),
+    "110000",
+  );
 
   // unexpected continuation bytes
-  Expect.listEquals([unicodeReplacementCharacterRune], utf8ToRunes([0x80]),
-      "80 => replacement character");
-  Expect.listEquals([unicodeReplacementCharacterRune], utf8ToRunes([0xbf]),
-      "bf => replacement character");
+  Expect.listEquals(
+    [unicodeReplacementCharacterRune],
+    utf8ToRunes([0x80]),
+    "80 => replacement character",
+  );
+  Expect.listEquals(
+    [unicodeReplacementCharacterRune],
+    utf8ToRunes([0xbf]),
+    "bf => replacement character",
+  );
 
   List<int> allContinuationBytes = <int>[];
   List<int> matchingReplacementChars = <int>[];
@@ -748,8 +807,11 @@ void testUtf8bytesToCodepoints(List<int> utf8ToRunes(List<int> utf8)) {
     allContinuationBytes.add(i);
     matchingReplacementChars.add(unicodeReplacementCharacterRune);
   }
-  Expect.listEquals(matchingReplacementChars, utf8ToRunes(allContinuationBytes),
-      "80 - bf => replacement character x 64");
+  Expect.listEquals(
+    matchingReplacementChars,
+    utf8ToRunes(allContinuationBytes),
+    "80 - bf => replacement character x 64",
+  );
 
   List<int> allFirstTwoByteSeq = <int>[];
   matchingReplacementChars = <int>[];
@@ -757,8 +819,11 @@ void testUtf8bytesToCodepoints(List<int> utf8ToRunes(List<int> utf8)) {
     allFirstTwoByteSeq.addAll([i, 0x20]);
     matchingReplacementChars.addAll([unicodeReplacementCharacterRune, 0x20]);
   }
-  Expect.listEquals(matchingReplacementChars, utf8ToRunes(allFirstTwoByteSeq),
-      "c0 - df + space => replacement character + space x 32");
+  Expect.listEquals(
+    matchingReplacementChars,
+    utf8ToRunes(allFirstTwoByteSeq),
+    "c0 - df + space => replacement character + space x 32",
+  );
 
   List<int> allFirstThreeByteSeq = <int>[];
   matchingReplacementChars = <int>[];
@@ -766,8 +831,11 @@ void testUtf8bytesToCodepoints(List<int> utf8ToRunes(List<int> utf8)) {
     allFirstThreeByteSeq.addAll([i, 0x20]);
     matchingReplacementChars.addAll([unicodeReplacementCharacterRune, 0x20]);
   }
-  Expect.listEquals(matchingReplacementChars, utf8ToRunes(allFirstThreeByteSeq),
-      "e0 - ef + space => replacement character x 16");
+  Expect.listEquals(
+    matchingReplacementChars,
+    utf8ToRunes(allFirstThreeByteSeq),
+    "e0 - ef + space => replacement character x 16",
+  );
 
   List<int> allFirstFourByteSeq = <int>[];
   matchingReplacementChars = <int>[];
@@ -775,8 +843,11 @@ void testUtf8bytesToCodepoints(List<int> utf8ToRunes(List<int> utf8)) {
     allFirstFourByteSeq.addAll([i, 0x20]);
     matchingReplacementChars.addAll([unicodeReplacementCharacterRune, 0x20]);
   }
-  Expect.listEquals(matchingReplacementChars, utf8ToRunes(allFirstFourByteSeq),
-      "f0 - f7 + space => replacement character x 8");
+  Expect.listEquals(
+    matchingReplacementChars,
+    utf8ToRunes(allFirstFourByteSeq),
+    "f0 - f7 + space => replacement character x 8",
+  );
 
   List<int> allFirstFiveByteSeq = <int>[];
   matchingReplacementChars = <int>[];
@@ -784,8 +855,11 @@ void testUtf8bytesToCodepoints(List<int> utf8ToRunes(List<int> utf8)) {
     allFirstFiveByteSeq.addAll([i, 0x20]);
     matchingReplacementChars.addAll([unicodeReplacementCharacterRune, 0x20]);
   }
-  Expect.listEquals(matchingReplacementChars, utf8ToRunes(allFirstFiveByteSeq),
-      "f8 - fb + space => replacement character x 4");
+  Expect.listEquals(
+    matchingReplacementChars,
+    utf8ToRunes(allFirstFiveByteSeq),
+    "f8 - fb + space => replacement character x 4",
+  );
 
   List<int> allFirstSixByteSeq = <int>[];
   matchingReplacementChars = <int>[];
@@ -793,235 +867,329 @@ void testUtf8bytesToCodepoints(List<int> utf8ToRunes(List<int> utf8)) {
     allFirstSixByteSeq.addAll([i, 0x20]);
     matchingReplacementChars.addAll([unicodeReplacementCharacterRune, 0x20]);
   }
-  Expect.listEquals(matchingReplacementChars, utf8ToRunes(allFirstSixByteSeq),
-      "fc - fd + space => replacement character x 2");
+  Expect.listEquals(
+    matchingReplacementChars,
+    utf8ToRunes(allFirstSixByteSeq),
+    "fc - fd + space => replacement character x 2",
+  );
 
   // Sequences with last continuation byte missing
-  Expect.listEquals([unicodeReplacementCharacterRune], utf8ToRunes([0xc2]),
-      "2-byte sequence with last byte missing");
   Expect.listEquals(
-      [unicodeReplacementCharacterRune, unicodeReplacementCharacterRune],
-      utf8ToRunes([0xe0, 0x80]),
-      "3-byte sequence with last byte missing");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf0, 0x80, 0x80]), "4-byte sequence with last byte missing");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf8, 0x88, 0x80, 0x80]),
-      "5-byte sequence with last byte missing");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfc, 0x80, 0x80, 0x80, 0x80]),
-      "6-byte sequence with last byte missing");
+    [unicodeReplacementCharacterRune],
+    utf8ToRunes([0xc2]),
+    "2-byte sequence with last byte missing",
+  );
+  Expect.listEquals(
+    [unicodeReplacementCharacterRune, unicodeReplacementCharacterRune],
+    utf8ToRunes([0xe0, 0x80]),
+    "3-byte sequence with last byte missing",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf0, 0x80, 0x80]),
+    "4-byte sequence with last byte missing",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf8, 0x88, 0x80, 0x80]),
+    "5-byte sequence with last byte missing",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfc, 0x80, 0x80, 0x80, 0x80]),
+    "6-byte sequence with last byte missing",
+  );
 
-  Expect.listEquals([unicodeReplacementCharacterRune], utf8ToRunes([0xdf]),
-      "2-byte sequence with last byte missing (hi)");
-  Expect.listEquals([unicodeReplacementCharacterRune],
-      utf8ToRunes([0xef, 0xbf]), "3-byte sequence with last byte missing (hi)");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf7, 0xbf, 0xbf]),
-      "4-byte sequence with last byte missing (hi)");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfb, 0xbf, 0xbf, 0xbf]),
-      "5-byte sequence with last byte missing (hi)");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfd, 0xbf, 0xbf, 0xbf, 0xbf]),
-      "6-byte sequence with last byte missing (hi)");
+  Expect.listEquals(
+    [unicodeReplacementCharacterRune],
+    utf8ToRunes([0xdf]),
+    "2-byte sequence with last byte missing (hi)",
+  );
+  Expect.listEquals(
+    [unicodeReplacementCharacterRune],
+    utf8ToRunes([0xef, 0xbf]),
+    "3-byte sequence with last byte missing (hi)",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf7, 0xbf, 0xbf]),
+    "4-byte sequence with last byte missing (hi)",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfb, 0xbf, 0xbf, 0xbf]),
+    "5-byte sequence with last byte missing (hi)",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfd, 0xbf, 0xbf, 0xbf, 0xbf]),
+    "6-byte sequence with last byte missing (hi)",
+  );
 
   // Concatenation of incomplete sequences
   Expect.listEquals(
-      [
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune,
-        unicodeReplacementCharacterRune
-      ],
-      utf8ToRunes([
-        0xc2,
-        0xe0,
-        0x80,
-        0xf0,
-        0x80,
-        0x80,
-        0xf8,
-        0x88,
-        0x80,
-        0x80,
-        0xfc,
-        0x80,
-        0x80,
-        0x80,
-        0x80,
-        0xdf,
-        0xef, // These two bytes form one incomplete sequence.
-        0xbf, // All others form one per byte.
-        0xf7,
-        0xbf,
-        0xbf,
-        0xfb,
-        0xbf,
-        0xbf,
-        0xbf,
-        0xfd,
-        0xbf,
-        0xbf,
-        0xbf,
-        0xbf
-      ]),
-      "Concatenation of incomplete sequences");
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([
+      0xc2,
+      0xe0,
+      0x80,
+      0xf0,
+      0x80,
+      0x80,
+      0xf8,
+      0x88,
+      0x80,
+      0x80,
+      0xfc,
+      0x80,
+      0x80,
+      0x80,
+      0x80,
+      0xdf,
+      0xef, // These two bytes form one incomplete sequence.
+      0xbf, // All others form one per byte.
+      0xf7,
+      0xbf,
+      0xbf,
+      0xfb,
+      0xbf,
+      0xbf,
+      0xbf,
+      0xfd,
+      0xbf,
+      0xbf,
+      0xbf,
+      0xbf,
+    ]),
+    "Concatenation of incomplete sequences",
+  );
 
   // Impossible bytes
   Expect.listEquals(
-      [unicodeReplacementCharacterRune], utf8ToRunes([0xfe]), "fe");
+    [unicodeReplacementCharacterRune],
+    utf8ToRunes([0xfe]),
+    "fe",
+  );
   Expect.listEquals(
-      [unicodeReplacementCharacterRune], utf8ToRunes([0xff]), "ff");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfe, 0xfe, 0xff, 0xff]), "fe fe ff ff");
+    [unicodeReplacementCharacterRune],
+    utf8ToRunes([0xff]),
+    "ff",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfe, 0xfe, 0xff, 0xff]),
+    "fe fe ff ff",
+  );
 
   // Overlong sequences
   Expect.listEquals(
-      [unicodeReplacementCharacterRune, unicodeReplacementCharacterRune],
-      utf8ToRunes([0xc0, 0xaf]),
-      "c0 af");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xe0, 0x80, 0xaf]), "e0 80 af");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf0, 0x80, 0x80, 0xaf]), "f0 80 80 af");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf8, 0x80, 0x80, 0x80, 0xaf]), "f8 80 80 80 af");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfc, 0x80, 0x80, 0x80, 0x80, 0xaf]), "fc 80 80 80 80 af");
+    [unicodeReplacementCharacterRune, unicodeReplacementCharacterRune],
+    utf8ToRunes([0xc0, 0xaf]),
+    "c0 af",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xe0, 0x80, 0xaf]),
+    "e0 80 af",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf0, 0x80, 0x80, 0xaf]),
+    "f0 80 80 af",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf8, 0x80, 0x80, 0x80, 0xaf]),
+    "f8 80 80 80 af",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfc, 0x80, 0x80, 0x80, 0x80, 0xaf]),
+    "fc 80 80 80 80 af",
+  );
 
   Expect.listEquals(
-      [unicodeReplacementCharacterRune, unicodeReplacementCharacterRune],
-      utf8ToRunes([0xc1, 0xbf]),
-      "c1 bf");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xe0, 0x9f, 0xbf]), "e0 9f bf");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf0, 0x8f, 0xbf, 0xbf]), "f0 8f bf bf");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf8, 0x87, 0xbf, 0xbf, 0xbf]), "f8 87 bf bf bf");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfc, 0x83, 0xbf, 0xbf, 0xbf, 0xbf]), "fc 83 bf bf bf bf");
+    [unicodeReplacementCharacterRune, unicodeReplacementCharacterRune],
+    utf8ToRunes([0xc1, 0xbf]),
+    "c1 bf",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xe0, 0x9f, 0xbf]),
+    "e0 9f bf",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf0, 0x8f, 0xbf, 0xbf]),
+    "f0 8f bf bf",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf8, 0x87, 0xbf, 0xbf, 0xbf]),
+    "f8 87 bf bf bf",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfc, 0x83, 0xbf, 0xbf, 0xbf, 0xbf]),
+    "fc 83 bf bf bf bf",
+  );
 
   Expect.listEquals(
-      [unicodeReplacementCharacterRune, unicodeReplacementCharacterRune],
-      utf8ToRunes([0xc0, 0x80]),
-      "c0 80");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xe0, 0x80, 0x80]), "e0 80 80");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf0, 0x80, 0x80, 0x80]), "f0 80 80 80");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xf8, 0x80, 0x80, 0x80, 0x80]), "f8 80 80 80 80");
-  Expect.listEquals([
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune,
-    unicodeReplacementCharacterRune
-  ], utf8ToRunes([0xfc, 0x80, 0x80, 0x80, 0x80, 0x80]), "fc 80 80 80 80 80");
+    [unicodeReplacementCharacterRune, unicodeReplacementCharacterRune],
+    utf8ToRunes([0xc0, 0x80]),
+    "c0 80",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xe0, 0x80, 0x80]),
+    "e0 80 80",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf0, 0x80, 0x80, 0x80]),
+    "f0 80 80 80",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xf8, 0x80, 0x80, 0x80, 0x80]),
+    "f8 80 80 80 80",
+  );
+  Expect.listEquals(
+    [
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+      unicodeReplacementCharacterRune,
+    ],
+    utf8ToRunes([0xfc, 0x80, 0x80, 0x80, 0x80, 0x80]),
+    "fc 80 80 80 80 80",
+  );
 
   // Other illegal code positions (???)
   Expect.listEquals([0xfffe], utf8ToRunes([0xef, 0xbf, 0xbe]), "U+FFFE");
@@ -1030,17 +1198,26 @@ void testUtf8bytesToCodepoints(List<int> utf8ToRunes(List<int> utf8)) {
 
 void testUtf8BytesToString(String decodeUtf8(List<int> input)) {
   Expect.stringEquals(
-      testEnglishPhrase, decodeUtf8(testEnglishUtf8), "English");
+    testEnglishPhrase,
+    decodeUtf8(testEnglishUtf8),
+    "English",
+  );
 
   Expect.stringEquals(testDanishPhrase, decodeUtf8(testDanishUtf8), "Danish");
 
   Expect.stringEquals(testHebrewPhrase, decodeUtf8(testHebrewUtf8), "Hebrew");
 
   Expect.stringEquals(
-      testRussianPhrase, decodeUtf8(testRussianUtf8), "Russian");
+    testRussianPhrase,
+    decodeUtf8(testRussianUtf8),
+    "Russian",
+  );
 
   Expect.stringEquals(testGreekPhrase, decodeUtf8(testGreekUtf8), "Greek");
 
   Expect.stringEquals(
-      testKatakanaPhrase, decodeUtf8(testKatakanaUtf8), "Katakana");
+    testKatakanaPhrase,
+    decodeUtf8(testKatakanaUtf8),
+    "Katakana",
+  );
 }
diff --git a/tests/lib/convert/utf85_test.dart b/tests/lib/convert/utf85_test.dart
index a3809918a8f..ccb4eb74d43 100644
--- a/tests/lib/convert/utf85_test.dart
+++ b/tests/lib/convert/utf85_test.dart
@@ -11,6 +11,8 @@ main() {
   for (int i = 0; i <= 0x10FFFF; i++) {
     if (i == unicodeBomCharacterRune || (i & 0x1FF800) == 0xD800) continue;
     Expect.equals(
-        i, utf8.decode(utf8.encode(new String.fromCharCode(i))).runes.first);
+      i,
+      utf8.decode(utf8.encode(new String.fromCharCode(i))).runes.first,
+    );
   }
 }
diff --git a/tests/lib/convert/utf8_encode_test.dart b/tests/lib/convert/utf8_encode_test.dart
index 0a43e1452f1..ad508effcd7 100644
--- a/tests/lib/convert/utf8_encode_test.dart
+++ b/tests/lib/convert/utf8_encode_test.dart
@@ -25,8 +25,13 @@ void testEncodeSlice() {
   String ascii = "ABCDE";
   Expect.listEquals([0x41, 0x42, 0x43, 0x44, 0x45], encoder.convert(ascii));
   Expect.listEquals([0x41, 0x42, 0x43, 0x44, 0x45], encoder.convert(ascii, 0));
-  Expect.listEquals(
-      [0x41, 0x42, 0x43, 0x44, 0x45], encoder.convert(ascii, 0, 5));
+  Expect.listEquals([
+    0x41,
+    0x42,
+    0x43,
+    0x44,
+    0x45,
+  ], encoder.convert(ascii, 0, 5));
   Expect.listEquals([0x42, 0x43, 0x44, 0x45], encoder.convert(ascii, 1));
   Expect.listEquals([0x41, 0x42, 0x43, 0x44], encoder.convert(ascii, 0, 4));
   Expect.listEquals([0x42, 0x43, 0x44], encoder.convert(ascii, 1, 4));
@@ -39,17 +44,59 @@ void testEncodeSlice() {
 
   var unicode = "\u0081\u0082\u1041\u{10101}";
 
-  Expect.listEquals(
-      [0xc2, 0x81, 0xc2, 0x82, 0xe1, 0x81, 0x81, 0xf0, 0x90, 0x84, 0x81],
-      encoder.convert(unicode));
-  Expect.listEquals(
-      [0xc2, 0x81, 0xc2, 0x82, 0xe1, 0x81, 0x81, 0xf0, 0x90, 0x84, 0x81],
-      encoder.convert(unicode, 0, unicode.length));
-  Expect.listEquals([0xc2, 0x82, 0xe1, 0x81, 0x81, 0xf0, 0x90, 0x84, 0x81],
-      encoder.convert(unicode, 1));
-  Expect.listEquals(
-      [0xc2, 0x82, 0xe1, 0x81, 0x81], encoder.convert(unicode, 1, 3));
+  Expect.listEquals([
+    0xc2,
+    0x81,
+    0xc2,
+    0x82,
+    0xe1,
+    0x81,
+    0x81,
+    0xf0,
+    0x90,
+    0x84,
+    0x81,
+  ], encoder.convert(unicode));
+  Expect.listEquals([
+    0xc2,
+    0x81,
+    0xc2,
+    0x82,
+    0xe1,
+    0x81,
+    0x81,
+    0xf0,
+    0x90,
+    0x84,
+    0x81,
+  ], encoder.convert(unicode, 0, unicode.length));
+  Expect.listEquals([
+    0xc2,
+    0x82,
+    0xe1,
+    0x81,
+    0x81,
+    0xf0,
+    0x90,
+    0x84,
+    0x81,
+  ], encoder.convert(unicode, 1));
+  Expect.listEquals([
+    0xc2,
+    0x82,
+    0xe1,
+    0x81,
+    0x81,
+  ], encoder.convert(unicode, 1, 3));
   // Split in the middle of a surrogate pair.
-  Expect.listEquals([0xc2, 0x82, 0xe1, 0x81, 0x81, 0xef, 0xbf, 0xbd],
-      encoder.convert(unicode, 1, 4));
+  Expect.listEquals([
+    0xc2,
+    0x82,
+    0xe1,
+    0x81,
+    0x81,
+    0xef,
+    0xbf,
+    0xbd,
+  ], encoder.convert(unicode, 1, 4));
 }
diff --git a/tests/lib/convert/utf8_test.dart b/tests/lib/convert/utf8_test.dart
index 9897a9dad25..d50905713d6 100644
--- a/tests/lib/convert/utf8_test.dart
+++ b/tests/lib/convert/utf8_test.dart
@@ -34,12 +34,16 @@ void testDecodeSlice() {
 
     if (ascii is Uint8List) {
       Expect.equals("ABCDE", decoder.convert(Uint8List.sublistView(ascii, 0)));
-      Expect.equals("ABCDE",
-          decoder.convert(Uint8List.sublistView(ascii, 0, ascii.length)));
+      Expect.equals(
+        "ABCDE",
+        decoder.convert(Uint8List.sublistView(ascii, 0, ascii.length)),
+      );
       Expect.equals("CDE", decoder.convert(Uint8List.sublistView(ascii, 2)));
       Expect.equals("BCD", decoder.convert(Uint8List.sublistView(ascii, 1, 4)));
       Expect.equals(
-          "ABCD", decoder.convert(Uint8List.sublistView(ascii, 0, 4)));
+        "ABCD",
+        decoder.convert(Uint8List.sublistView(ascii, 0, 4)),
+      );
     }
 
     Expect.throws(() => decoder.convert(ascii, -1)); //    start < 0.
@@ -60,14 +64,22 @@ void testDecodeSlice() {
     Expect.equals("\u0082", decoder.convert(utf8, 2, 4));
 
     if (utf8 is Uint8List) {
-      Expect.equals("\u0081\u0082\u1041",
-          decoder.convert(Uint8List.sublistView(utf8, 0)));
       Expect.equals(
-          "\u0082\u1041", decoder.convert(Uint8List.sublistView(utf8, 2)));
+        "\u0081\u0082\u1041",
+        decoder.convert(Uint8List.sublistView(utf8, 0)),
+      );
       Expect.equals(
-          "\u0081\u0082", decoder.convert(Uint8List.sublistView(utf8, 0, 4)));
+        "\u0082\u1041",
+        decoder.convert(Uint8List.sublistView(utf8, 2)),
+      );
       Expect.equals(
-          "\u0082", decoder.convert(Uint8List.sublistView(utf8, 2, 4)));
+        "\u0081\u0082",
+        decoder.convert(Uint8List.sublistView(utf8, 0, 4)),
+      );
+      Expect.equals(
+        "\u0082",
+        decoder.convert(Uint8List.sublistView(utf8, 2, 4)),
+      );
     }
 
     Expect.throws(() => decoder.convert(utf8, 1));
diff --git a/tests/lib/developer/post_event_test.dart b/tests/lib/developer/post_event_test.dart
index 612d7e6aa3b..f5f7c1d4f2a 100644
--- a/tests/lib/developer/post_event_test.dart
+++ b/tests/lib/developer/post_event_test.dart
@@ -17,7 +17,7 @@ final protectedStreams = [
   'Logging',
   'Timeline',
   'Profiler',
-  '_aStreamThatStartsWithAnUnderScore'
+  '_aStreamThatStartsWithAnUnderScore',
 ];
 
 main() {