diff --git a/tools/test.dart b/tools/test.dart
index a0f552505aa..b4f7b630d9e 100755
--- a/tools/test.dart
+++ b/tools/test.dart
@@ -49,6 +49,7 @@ final TEST_SUITE_DIRECTORIES = [
     new Path('pkg'),
     new Path('runtime/tests/vm'),
     new Path('samples'),
+    new Path('samples-dev'),
     new Path('tests/benchmark_smoke'),
     new Path('tests/chrome'),
     new Path('tests/compiler/dart2js'),