diff --git a/test/over_react/shared/map_proxy_tests.dart b/test/over_react/shared/map_proxy_tests.dart
index 73ef73dcc..1a046831d 100644
--- a/test/over_react/shared/map_proxy_tests.dart
+++ b/test/over_react/shared/map_proxy_tests.dart
@@ -176,4 +176,4 @@ void mapProxyTests(Map Function(Map proxiedMap) mapProxyFactory) {
   });
 }
 
-class MockMap extends Mock implements Map {}
+class MockMap extends Mock implements Map<dynamic, dynamic> {}