diff --git a/python/helpers/tests/generator3_tests/__init__.py b/python/helpers/tests/generator3_tests/__init__.py
index 469775f8cc04..faf0a6fc5e9d 100644
--- a/python/helpers/tests/generator3_tests/__init__.py
+++ b/python/helpers/tests/generator3_tests/__init__.py
@@ -16,6 +16,7 @@ _override_test_data = False
 
 class GeneratorTestCase(unittest.TestCase):
     longMessage = True
+    maxDiff = None
 
     @classmethod
     def setUpClass(cls):