diff --git a/actions/pubspec.yaml b/actions/pubspec.yaml
index 56cba3a72f..f4b560a372 100644
--- a/actions/pubspec.yaml
+++ b/actions/pubspec.yaml
@@ -23,7 +23,7 @@ dev_dependencies:
   amplify_lints: ^3.0.0
   build_runner: ^2.4.9
   build_test: ^2.2.0
-  checks: ^0.2.2
+  checks: ^0.3.0
   json_serializable: 6.8.0
   test: ^1.22.1
 
diff --git a/actions/test/node/interop_test.dart b/actions/test/node/interop_test.dart
index 7c4f3c93dd..6b385aec3b 100644
--- a/actions/test/node/interop_test.dart
+++ b/actions/test/node/interop_test.dart
@@ -45,7 +45,7 @@ void main() {
 
       test('exec', () async {
         await check(childProcess.exec('echo', ['Hello'])).completes(
-          it()
+          (it) => it
             ..has((res) => res.exitCode, 'exitCode').equals(0)
             ..has((res) => res.stdout, 'stdout').equals('Hello\n'),
         );
@@ -54,19 +54,20 @@ void main() {
       test('spawn', () async {
         final proc = childProcess.spawn('echo', ['Hello']);
         unawaited(
-          check(proc.stdout!.stream).withQueue.inOrder([
-            // ignore: unawaited_futures
-            it()..emits(it()..deepEquals(utf8.encode('Hello\n'))),
-            // ignore: unawaited_futures
-            it()..isDone(),
-          ]),
+          expectLater(
+            proc.stdout!.stream.map(String.fromCharCodes),
+            emitsInOrder([
+              'Hello\n',
+              emitsDone,
+            ]),
+          ),
         );
         unawaited(
           check(proc.stderr!.stream).withQueue.isDone(),
         );
         unawaited(
           check((proc.onClose, proc.onExit).wait).completes(
-            it()..has((res) => res.$2.toDartInt, 'exitCode').equals(0),
+            (it) => it..has((res) => res.$2.toDartInt, 'exitCode').equals(0),
           ),
         );
         await check(proc.onSpawn).completes();
@@ -81,22 +82,20 @@ void main() {
           stdin: echo.stdout,
         );
         unawaited(
-          check(proc.stdout!.stream).withQueue.inOrder([
-            it()
-              // ignore: unawaited_futures
-              ..emits(
-                it()..deepEquals(utf8.encode('Hello\n')),
-              ),
-            // ignore: unawaited_futures
-            it()..isDone(),
-          ]),
+          expectLater(
+            proc.stdout!.stream.map(String.fromCharCodes),
+            emitsInOrder([
+              'Hello\n',
+              emitsDone,
+            ]),
+          ),
         );
         unawaited(
           check(proc.stderr!.stream).withQueue.isDone(),
         );
         unawaited(
           check((proc.onClose, proc.onExit).wait).completes(
-            it()..has((res) => res.$2.toDartInt, 'exitCode').equals(0),
+            (it) => it..has((res) => res.$2.toDartInt, 'exitCode').equals(0),
           ),
         );
         await check(proc.onSpawn).completes();
diff --git a/actions/test/node/process_manager_test.dart b/actions/test/node/process_manager_test.dart
index d65207cccc..061c2bd7af 100644
--- a/actions/test/node/process_manager_test.dart
+++ b/actions/test/node/process_manager_test.dart
@@ -5,7 +5,6 @@
 library;
 
 import 'dart:async';
-import 'dart:convert';
 
 import 'package:actions/actions.dart';
 import 'package:actions/src/node/process_manager.dart';
@@ -29,7 +28,7 @@ void main() {
     group('run', () {
       test('echo', () async {
         await check(processManager.run(['echo', 'Hello'])).completes(
-          it()
+          (it) => it
             ..has((res) => res.exitCode, 'exitCode').equals(0)
             ..has((res) => res.stdout, 'stdout').equals('Hello\n'),
         );
@@ -38,7 +37,7 @@ void main() {
       test('pipe', () async {
         final echo = childProcess.spawn('echo', ['Hello']);
         await check(processManager.run(['tee'], pipe: echo)).completes(
-          it()
+          (it) => it
             ..has((res) => res.exitCode, 'exitCode').equals(0)
             ..has((res) => res.stdout, 'stdout').equals('Hello\n'),
         );
@@ -52,22 +51,22 @@ void main() {
             ['echo', 'Hello'],
             mode: mode,
           );
-          final expectedOutput = utf8.encode('Hello\n');
           unawaited(
-            check(proc.stdout).withQueue.inOrder([
-              if (mode != ProcessStartMode.inheritStdio &&
-                  mode != ProcessStartMode.detached)
-                // ignore: unawaited_futures
-                it()..emits(it()..deepEquals(expectedOutput)),
-              // ignore: unawaited_futures
-              it()..isDone(),
-            ]),
+            expectLater(
+              proc.stdout.map(String.fromCharCodes),
+              emitsInOrder([
+                if (mode != ProcessStartMode.inheritStdio &&
+                    mode != ProcessStartMode.detached)
+                  'Hello\n',
+                emitsDone,
+              ]),
+            ),
           );
           unawaited(
             check(proc.stderr).withQueue.isDone(),
           );
           check(proc.pid).isGreaterThan(0);
-          await check(proc.exitCode).completes(it()..equals(0));
+          await check(proc.exitCode).completes((it) => it..equals(0));
         });
       }
 
@@ -75,16 +74,16 @@ void main() {
         final echo = childProcess.spawn('echo', ['Hello']);
         final proc = await processManager.start(['tee'], pipe: echo);
         unawaited(
-          check(proc.stdout).withQueue.inOrder([
-            it()
-              // ignore: unawaited_futures
-              ..emits(it()..deepEquals(utf8.encode('Hello\n'))),
-            // ignore: unawaited_futures
-            it()..isDone(),
-          ]),
+          expectLater(
+            proc.stdout.map(String.fromCharCodes),
+            emitsInOrder([
+              'Hello\n',
+              emitsDone,
+            ]),
+          ),
         );
         unawaited(check(proc.stderr).withQueue.isDone());
-        await check(proc.exitCode).completes(it()..equals(0));
+        await check(proc.exitCode).completes((it) => it..equals(0));
       });
     });
   });
diff --git a/packages/aft/pubspec.yaml b/packages/aft/pubspec.yaml
index ea157757f8..e1198cc79c 100644
--- a/packages/aft/pubspec.yaml
+++ b/packages/aft/pubspec.yaml
@@ -67,7 +67,7 @@ dev_dependencies:
   amplify_lints: ">=2.0.2 <2.1.0"
   build_runner: ^2.4.9
   built_value_generator: 8.8.1
-  checks: ^0.2.2
+  checks: ^0.3.0
   json_serializable: 6.8.0
   test: ^1.22.1
   test_descriptor: ^2.0.1
diff --git a/packages/aft/test/config/config_loader_test.dart b/packages/aft/test/config/config_loader_test.dart
index 7c4dcb993d..168fd07164 100644
--- a/packages/aft/test/config/config_loader_test.dart
+++ b/packages/aft/test/config/config_loader_test.dart
@@ -108,12 +108,12 @@ aft:
           'workingDirectory',
         ).equals(workingDirectory)
         ..has((config) => config.dependencies.toMap(), 'dependencies').which(
-          it()
+          (it) => it
             ..containsKey('json_serializable')
-            ..not(it()..containsKey('built_value')),
+            ..not((it) => it..containsKey('built_value')),
         )
         ..has((config) => config.scripts.toMap(), 'scripts').which(
-          it()
+          (it) => it
             ..containsKey('license')
             ..containsKey('format'),
         );