diff --git a/sdk/lib/io/overrides.dart b/sdk/lib/io/overrides.dart
index b7334c825d5..4a4586dc471 100644
--- a/sdk/lib/io/overrides.dart
+++ b/sdk/lib/io/overrides.dart
@@ -259,7 +259,10 @@ abstract base class IOOverrides {
   /// When this override is installed, this function overrides the behavior of
   /// `FileSystemEntity.type`.
   Future<FileSystemEntityType> fseGetType(String path, bool followLinks) {
-    return FileSystemEntity._getTypeRequest(utf8.encode(path), followLinks);
+    return FileSystemEntity._getTypeRequest(
+      FileSystemEntity._toUtf8Array(path),
+      followLinks,
+    );
   }
 
   /// Returns the [FileSystemEntityType] for [path].
@@ -267,7 +270,10 @@ abstract base class IOOverrides {
   /// When this override is installed, this function overrides the behavior of
   /// `FileSystemEntity.typeSync`.
   FileSystemEntityType fseGetTypeSync(String path, bool followLinks) {
-    return FileSystemEntity._getTypeSyncHelper(utf8.encode(path), followLinks);
+    return FileSystemEntity._getTypeSyncHelper(
+      FileSystemEntity._toUtf8Array(path),
+      followLinks,
+    );
   }
 
   // _FileSystemWatcher
diff --git a/tests/standalone/io/io_override_test.dart b/tests/standalone/io/io_override_test.dart
index 843082f2c49..8445d55bf46 100644
--- a/tests/standalone/io/io_override_test.dart
+++ b/tests/standalone/io/io_override_test.dart
@@ -349,9 +349,22 @@ void emptyIOOverride() {
   );
 }
 
-main() async {
+Future<void> emptyIOOverrideAsync() async {
+  await IOOverrides.runWithIOOverrides(
+    () async => Expect.equals(
+      await FileSystemEntity.type('/'),
+      FileSystemEntityType.directory,
+    ),
+    EmptyOverride(),
+  );
+}
+
+void main() async {
+  asyncStart();
   await ioOverridesRunTest();
   globalIOOverridesTest();
   globalIOOverridesZoneTest();
   emptyIOOverride();
+  await emptyIOOverrideAsync();
+  asyncEnd();
 }