diff --git a/lib/iris/tests/unit/data_manager/test_DataManager.py b/lib/iris/tests/unit/data_manager/test_DataManager.py
index f9ee73bc18..58004b120e 100644
--- a/lib/iris/tests/unit/data_manager/test_DataManager.py
+++ b/lib/iris/tests/unit/data_manager/test_DataManager.py
@@ -88,12 +88,12 @@ def test_lazy_with_lazy__dtype_failure(self):
         self.assertFalse(dm1 == dm2)
 
     def test_none(self):
-        dm1 = DataManager(data=None, shape=(1, ))
-        dm2 = DataManager(data=None, shape=(1, ))
+        dm1 = DataManager(data=None, shape=(1,))
+        dm2 = DataManager(data=None, shape=(1,))
         self.assertTrue(dm1 == dm2)
 
     def test_none_with_real(self):
-        dm1 = DataManager(data=None, shape=(1, ))
+        dm1 = DataManager(data=None, shape=(1,))
         dm2 = DataManager(self.real_array)
         self.assertFalse(dm1 == dm2)