diff --git a/pkgs/test/CHANGELOG.md b/pkgs/test/CHANGELOG.md
index c43e85542..1cbee81cc 100644
--- a/pkgs/test/CHANGELOG.md
+++ b/pkgs/test/CHANGELOG.md
@@ -4,8 +4,9 @@
   when tests are run directly on platforms which support `dart:io`. The
   environment variable takes precedence over configuration in `dart_test.yaml`
   but is overridden by the `--reporter` flag when passed to the test runner.
-* Include passing test and suite loading messages within the `Passing tests`
-  group in `GithubReporter`.
+* Suppress dart2js compiler output for successful compiles.
+* Include output from passing tests  messages within the `Passing tests` group
+  in `GithubReporter`.
 
 ## 1.31.2
 
diff --git a/pkgs/test/test/runner/browser/loader_test.dart b/pkgs/test/test/runner/browser/loader_test.dart
index d14989520..ba3f56c34 100644
--- a/pkgs/test/test/runner/browser/loader_test.dart
+++ b/pkgs/test/test/runner/browser/loader_test.dart
@@ -174,9 +174,8 @@ void main() {
     var loadSuite = suites.first;
 
     var liveTest = (loadSuite.group.entries.single as Test).load(loadSuite);
-    // Skip the "Compiled" message from dart2js.
     expect(
-      liveTest.onMessage.skip(1).first.then((message) => message.text),
+      liveTest.onMessage.first.then((message) => message.text),
       completion(equals('print within test')),
     );
     await liveTest.run();
diff --git a/pkgs/test/test/runner/browser/runner_test.dart b/pkgs/test/test/runner/browser/runner_test.dart
index 637970df9..58a898fdb 100644
--- a/pkgs/test/test/runner/browser/runner_test.dart
+++ b/pkgs/test/test/runner/browser/runner_test.dart
@@ -41,7 +41,7 @@ void main() {
         containsInOrder([
           'Error: Compilation failed.',
           '-1: loading test.dart [E]',
-          'Failed to load "test.dart": dart2js failed.',
+          'Failed to load "test.dart": Bad state: dart2js failed.',
         ]),
       );
       await test.shouldExit(1);
diff --git a/pkgs/test/test/runner/json_reporter_test.dart b/pkgs/test/test/runner/json_reporter_test.dart
index 41d978b69..a984248a5 100644
--- a/pkgs/test/test/runner/json_reporter_test.dart
+++ b/pkgs/test/test/runner/json_reporter_test.dart
@@ -630,14 +630,6 @@ void main() {
             [
               suiteJson(0, platform: 'chrome'),
               testStartJson(1, 'loading test.dart', groupIDs: []),
-              printJson(
-                1,
-                isA<String>().having(
-                  (s) => s.split('\n'),
-                  'lines',
-                  contains(startsWith('Compiled')),
-                ),
-              ),
               testDoneJson(1, hidden: true),
             ],
             [
@@ -847,14 +839,6 @@ void customTest(String name, dynamic Function() testFn) => test(name, testFn);
         [
           suiteJson(0, platform: 'chrome'),
           testStartJson(1, 'loading test.dart', groupIDs: []),
-          printJson(
-            1,
-            isA<String>().having(
-              (s) => s.split('\n'),
-              'lines',
-              contains(startsWith('Compiled')),
-            ),
-          ),
           testDoneJson(1, hidden: true),
         ],
         [
diff --git a/pkgs/test/test/runner/node/runner_test.dart b/pkgs/test/test/runner/node/runner_test.dart
index d9f7c2390..05f5b4d0a 100644
--- a/pkgs/test/test/runner/node/runner_test.dart
+++ b/pkgs/test/test/runner/node/runner_test.dart
@@ -86,7 +86,7 @@ void main() {
         containsInOrder([
           'Error: Compilation failed.',
           '-1: loading test.dart [E]',
-          'Failed to load "test.dart": dart2js failed.',
+          'Failed to load "test.dart": Bad state: dart2js failed.',
         ]),
       );
       await test.shouldExit(1);
diff --git a/pkgs/test_core/CHANGELOG.md b/pkgs/test_core/CHANGELOG.md
index 9e27603ea..d5a173403 100644
--- a/pkgs/test_core/CHANGELOG.md
+++ b/pkgs/test_core/CHANGELOG.md
@@ -1,8 +1,9 @@
 ## 0.6.20-wip
 
 * Add support for `DART_TEST_REPORTER` environment variable.
-* Include passing test and suite loading messages within the `Passing tests`
-  group in `GithubReporter`.
+* Suppress dart2js compiler output for successful compiles.
+* Include passing test  messages within the `Passing tests` group in
+  `GithubReporter`.
 
 ## 0.6.19
 
diff --git a/pkgs/test_core/lib/src/runner/dart2js_compiler_pool.dart b/pkgs/test_core/lib/src/runner/dart2js_compiler_pool.dart
index 5bea2ee39..0f92626cb 100644
--- a/pkgs/test_core/lib/src/runner/dart2js_compiler_pool.dart
+++ b/pkgs/test_core/lib/src/runner/dart2js_compiler_pool.dart
@@ -13,11 +13,6 @@ import '../util/package_config.dart';
 import 'compiler_pool.dart';
 import 'suite.dart';
 
-/// A regular expression matching the first status line printed by dart2js.
-final _dart2jsStatus = RegExp(
-  r'^Dart file \(.*\) compiled to JavaScript: .*\n?',
-);
-
 /// A pool of `dart2js` instances.
 ///
 /// This limits the number of compiler instances running concurrently.
@@ -88,10 +83,11 @@ class Dart2JsCompilerPool extends CompilerPool {
       _processes.remove(process);
       if (closed) return;
 
-      var output = buffer.toString().replaceFirst(_dart2jsStatus, '');
-      if (output.isNotEmpty) print(output);
-
-      if (exitCode != 0) throw 'dart2js failed.';
+      if (exitCode != 0) {
+        var output = buffer.toString();
+        if (output.isNotEmpty) print(output);
+        throw StateError('dart2js failed.');
+      }
 
       _fixSourceMap('$path.map');
     });
diff --git a/pkgs/test_core/lib/src/runner/wasm_compiler_pool.dart b/pkgs/test_core/lib/src/runner/wasm_compiler_pool.dart
index 9993c1d57..7fd5cdd03 100644
--- a/pkgs/test_core/lib/src/runner/wasm_compiler_pool.dart
+++ b/pkgs/test_core/lib/src/runner/wasm_compiler_pool.dart
@@ -77,10 +77,11 @@ class WasmCompilerPool extends CompilerPool {
       _processes.remove(process);
       if (closed) return;
 
-      var output = buffer.toString();
-      if (output.isNotEmpty) print(output);
-
-      if (exitCode != 0) throw StateError('dart2wasm failed.');
+      if (exitCode != 0) {
+        var output = buffer.toString();
+        if (output.isNotEmpty) print(output);
+        throw StateError('dart2wasm failed.');
+      }
     });
   }