diff --git a/.gitattributes b/.gitattributes
index 112752d1ba1..f9b113558cc 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -17,9 +17,12 @@ tests/compiler/dart2js_extra/literal_string_juxtaposition_test.dart -text
 tests/language/raw_string_test.dart -text
 tests/language/multiline_strings_test.dart -text
 tests/lib/convert/json_pretty_test.dart -text
+tests/lib/mirrors/method_mirror_source_line_ending_test.dart -text
 tests/lib/mirrors/method_mirror_source_line_ending_cr.dart -text
 tests/lib/mirrors/method_mirror_source_line_ending_crlf.dart -text
 tests/lib/mirrors/method_mirror_source_line_ending_lf.dart -text
+tests/lib/mirrors/method_mirror_source_test.dart -text
+tests/lib/mirrors/method_mirror_source_other.dart -text
 pkg/js_ast/test/printer_callback_test.dart -text
 
 # Files to leave alone and not diff.
diff --git a/tests/lib/mirrors/method_mirror_source_line_ending_lf.dart b/tests/lib/mirrors/method_mirror_source_line_ending_lf.dart
index 71a34c82d29..b805a757a5d 100755
--- a/tests/lib/mirrors/method_mirror_source_line_ending_lf.dart
+++ b/tests/lib/mirrors/method_mirror_source_line_ending_lf.dart
@@ -2,8 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// This file is marked executable so source control will preserve the type of
-// line ending.
+// Note: This test relies on LF line endings in the source file.
 
 library line_endings.lf;
 
diff --git a/tests/lib/mirrors/method_mirror_source_line_ending_test.dart b/tests/lib/mirrors/method_mirror_source_line_ending_test.dart
index e052cc10a95..c0593979c9f 100644
--- a/tests/lib/mirrors/method_mirror_source_line_ending_test.dart
+++ b/tests/lib/mirrors/method_mirror_source_line_ending_test.dart
@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Note: These tests rely on specific line endings in the source files.
+
 import "dart:mirrors";
 import "package:expect/expect.dart";
 
diff --git a/tests/lib/mirrors/method_mirror_source_other.dart b/tests/lib/mirrors/method_mirror_source_other.dart
index 29adf5bb7a6..37151b62d18 100644
--- a/tests/lib/mirrors/method_mirror_source_other.dart
+++ b/tests/lib/mirrors/method_mirror_source_other.dart
@@ -3,4 +3,6 @@ main() {
 }
 // This function must be on the first line.
 
-class SomethingInOther {}
\ No newline at end of file
+class SomethingInOther {}
+
+// Note: This test relies on LF line endings in the source file.
diff --git a/tests/lib/mirrors/method_mirror_source_test.dart b/tests/lib/mirrors/method_mirror_source_test.dart
index 9b0945209d0..cea4dc16318 100644
--- a/tests/lib/mirrors/method_mirror_source_test.dart
+++ b/tests/lib/mirrors/method_mirror_source_test.dart
@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Note: This test relies on LF line endings in the source file.
+
 import "dart:mirrors";
 import "package:expect/expect.dart";
 import "method_mirror_source_other.dart";