Index: packages/barback/test/transformer/mock.dart |
diff --git a/packages/barback/test/transformer/mock.dart b/packages/barback/test/transformer/mock.dart |
index 09c3628efaaeeb97ecf0c15a3cf643f4d15b82df..b6120e250c97fc7fb42777556a75a40a7a1d9a01 100644 |
--- a/packages/barback/test/transformer/mock.dart |
+++ b/packages/barback/test/transformer/mock.dart |
@@ -49,7 +49,7 @@ abstract class MockTransformer extends Transformer { |
/// |
/// Once this transformer finishes running, this is reset to a new completer, |
/// so it can be used multiple times. |
- var _started = new Completer(); |
+ var _started = new Completer<Null>(); |
/// `true` if any transforms are currently running. |
/// |