diff --git a/test/observable_test_utils.dart b/test/observable_test_utils.dart
index 14a8b37..2685f0c 100644
--- a/test/observable_test_utils.dart
+++ b/test/observable_test_utils.dart
@@ -4,8 +4,6 @@
 
 library observable.test.observable_test_utils;
 
-import 'dart:async';
-
 import 'package:observable/observable.dart';
 import 'package:test/test.dart';