diff --git a/Tests/test_file_bufrstub.py b/Tests/test_file_bufrstub.py
index e2b63afc4..4932930ff 100644
--- a/Tests/test_file_bufrstub.py
+++ b/Tests/test_file_bufrstub.py
@@ -32,7 +32,7 @@ class TestFileBufrStub(PillowTestCase):
         im = Image.open(TEST_FILE)
 
         # Act / Assert: stub cannot load without an implemented handler
-        self.assertRaises(IOError, lambda: im.load())
+        self.assertRaises(IOError, im.load)
 
     def test_save(self):
         # Arrange