diff --git a/tests/document/instance.py b/tests/document/instance.py
index 29692c20..e1710b9f 100644
--- a/tests/document/instance.py
+++ b/tests/document/instance.py
@@ -958,8 +958,7 @@ class InstanceTest(unittest.TestCase):
         flip(w1)
         self.assertTrue(w1.toggle)
         self.assertEqual(w1.count, 1)
-        self.assertRaisesRegexp(OperationError,
-            "Race condition preventing document update detected",
+        self.assertRaises(OperationError,
             w1.save, save_condition={'save_id': UUID(42)})
         w1.reload()
         self.assertFalse(w1.toggle)
@@ -988,8 +987,7 @@ class InstanceTest(unittest.TestCase):
         self.assertEqual(w1.count, 2)
         flip(w2)
         flip(w2)
-        self.assertRaisesRegexp(OperationError,
-            "Race condition preventing document update detected",
+        self.assertRaises(OperationError,
             w2.save, save_condition={'save_id': old_id})
         w2.reload()
         self.assertFalse(w2.toggle)
@@ -1002,8 +1000,7 @@ class InstanceTest(unittest.TestCase):
         self.assertTrue(w1.toggle)
         self.assertEqual(w1.count, 3)
         flip(w1)
-        self.assertRaisesRegexp(OperationError,
-            "Race condition preventing document update detected",
+        self.assertRaises(OperationError,
             w1.save, save_condition={'count__gte': w1.count})
         w1.reload()
         self.assertTrue(w1.toggle)