diff --git a/dev/devicelab/bin/tasks/flavors_test.dart b/dev/devicelab/bin/tasks/flavors_test.dart
index 055f58aa29f..aab245b8894 100644
--- a/dev/devicelab/bin/tasks/flavors_test.dart
+++ b/dev/devicelab/bin/tasks/flavors_test.dart
@@ -13,31 +13,37 @@ Future<void> main() async {
   await task(() async {
     await createFlavorsTest().call();
     await createIntegrationTestFlavorsTest().call();
-    // test install and uninstall of flavors app
-    await inDirectory('${flutterDirectory.path}/dev/integration_tests/flavors', () async {
-      await flutter(
-        'install',
-        options: <String>['--debug', '--flavor', 'paid'],
-      );
-      await flutter(
-        'install',
-        options: <String>['--debug', '--flavor', 'paid', '--uninstall-only'],
-      );
-      final StringBuffer stderr = StringBuffer();
-      await evalFlutter(
-        'install',
-        canFail: true,
-        stderr: stderr,
-        options: <String>['--flavor', 'bogus'],
-      );
 
-      final String stderrString = stderr.toString();
-      if (!stderrString.contains('The Xcode project defines schemes: free, paid')) {
-        print(stderrString);
-        return TaskResult.failure('Should not succeed with bogus flavor');
-      }
-    });
+    final TaskResult installTestsResult = await inDirectory(
+      '${flutterDirectory.path}/dev/integration_tests/flavors',
+      () async {
+        await flutter(
+          'install',
+          options: <String>['--debug', '--flavor', 'paid'],
+        );
+        await flutter(
+          'install',
+          options: <String>['--debug', '--flavor', 'paid', '--uninstall-only'],
+        );
 
-    return TaskResult.success(null);
+        final StringBuffer stderr = StringBuffer();
+        await evalFlutter(
+          'install',
+          canFail: true,
+          stderr: stderr,
+          options: <String>['--flavor', 'bogus'],
+        );
+
+        final String stderrString = stderr.toString();
+        if (!stderrString.contains('"build/app/outputs/flutter-apk/app-bogus-release.apk" does not exist.')) {
+          print(stderrString);
+          return TaskResult.failure('Should not succeed with bogus flavor');
+        }
+
+        return TaskResult.success(null);
+      },
+    );
+
+    return installTestsResult;
   });
 }
diff --git a/dev/devicelab/bin/tasks/flavors_test_ios.dart b/dev/devicelab/bin/tasks/flavors_test_ios.dart
index 2fbfcb9e0a4..4e84ed4ec35 100644
--- a/dev/devicelab/bin/tasks/flavors_test_ios.dart
+++ b/dev/devicelab/bin/tasks/flavors_test_ios.dart
@@ -14,30 +14,35 @@ Future<void> main() async {
     await createFlavorsTest().call();
     await createIntegrationTestFlavorsTest().call();
     // test install and uninstall of flavors app
-    await inDirectory('${flutterDirectory.path}/dev/integration_tests/flavors', () async {
-      await flutter(
-        'install',
-        options: <String>['--flavor', 'paid'],
-      );
-      await flutter(
-        'install',
-        options: <String>['--flavor', 'paid', '--uninstall-only'],
-      );
-      final StringBuffer stderr = StringBuffer();
-      await evalFlutter(
-        'install',
-        canFail: true,
-        stderr: stderr,
-        options: <String>['--flavor', 'bogus'],
-      );
+    final TaskResult installTestsResult = await inDirectory(
+      '${flutterDirectory.path}/dev/integration_tests/flavors',
+      () async {
+        await flutter(
+          'install',
+          options: <String>['--flavor', 'paid'],
+        );
+        await flutter(
+          'install',
+          options: <String>['--flavor', 'paid', '--uninstall-only'],
+        );
+        final StringBuffer stderr = StringBuffer();
+        await evalFlutter(
+          'install',
+          canFail: true,
+          stderr: stderr,
+          options: <String>['--flavor', 'bogus'],
+        );
 
-      final String stderrString = stderr.toString();
-      if (!stderrString.contains('install failed, bogus flavor not found')) {
-        print(stderrString);
-        return TaskResult.failure('Should not succeed with bogus flavor');
-      }
-    });
+        final String stderrString = stderr.toString();
+        if (!stderrString.contains('The Xcode project defines schemes: free, paid')) {
+          print(stderrString);
+          return TaskResult.failure('Should not succeed with bogus flavor');
+        }
 
-    return TaskResult.success(null);
+        return TaskResult.success(null);
+      },
+    );
+
+    return installTestsResult;
   });
 }
diff --git a/dev/devicelab/bin/tasks/flavors_test_macos.dart b/dev/devicelab/bin/tasks/flavors_test_macos.dart
index 346bc31a19c..e3bb56123bc 100644
--- a/dev/devicelab/bin/tasks/flavors_test_macos.dart
+++ b/dev/devicelab/bin/tasks/flavors_test_macos.dart
@@ -14,26 +14,31 @@ Future<void> main() async {
     await createFlavorsTest().call();
     await createIntegrationTestFlavorsTest().call();
 
-    await inDirectory('${flutterDirectory.path}/dev/integration_tests/flavors', () async {
-      final StringBuffer stderr = StringBuffer();
+    final TaskResult installTestsResult = await inDirectory(
+      '${flutterDirectory.path}/dev/integration_tests/flavors',
+      () async {
+        final StringBuffer stderr = StringBuffer();
 
-      await evalFlutter(
-        'install',
-        canFail: true,
-        stderr: stderr,
-        options: <String>[
-          '--d', 'macos',
-          '--flavor', 'free'
-        ],
-      );
+        await evalFlutter(
+          'install',
+          canFail: true,
+          stderr: stderr,
+          options: <String>[
+            '--d', 'macos',
+            '--flavor', 'free'
+          ],
+        );
 
-      final String stderrString = stderr.toString();
-      if (!stderrString.contains('Host and target are the same. Nothing to install.')) {
-        print(stderrString);
-        return TaskResult.failure('Installing a macOS app on macOS should no-op');
-      }
-    });
+        final String stderrString = stderr.toString();
+        if (!stderrString.contains('Host and target are the same. Nothing to install.')) {
+          print(stderrString);
+          return TaskResult.failure('Installing a macOS app on macOS should no-op');
+        }
 
-    return TaskResult.success(null);
+        return TaskResult.success(null);
+      },
+    );
+
+    return installTestsResult;
   });
 }