diff --git a/graphene/utils/tests/test_deprecated.py b/graphene/utils/tests/test_deprecated.py
index 8a14434b6..7ad58725d 100644
--- a/graphene/utils/tests/test_deprecated.py
+++ b/graphene/utils/tests/test_deprecated.py
@@ -5,8 +5,8 @@
 from ..deprecated import warn_deprecation
 
 
-def test_warn_deprecation(mocker):
-    mocker.patch.object(deprecated.warnings, "warn")
+def test_warn_deprecation(monkeypatch):
+    monkeypatch.setattr(deprecated.warnings, "warn") 
 
     warn_deprecation("OH!")
     deprecated.warnings.warn.assert_called_with(