diff --git a/tests/system/django_spanner/test_decimal.py b/tests/system/django_spanner/test_decimal.py
index 778b5f8702..73df7e796b 100644
--- a/tests/system/django_spanner/test_decimal.py
+++ b/tests/system/django_spanner/test_decimal.py
@@ -91,7 +91,7 @@ def test_decimal_precision_limit(self):
             with self.assertRaises(ValueError):
                 num_val.save()
         else:
-            with self.assertRaisesRegex(ProgrammingError):
+            with self.assertRaises(ProgrammingError):
                 num_val.save()
 
     def test_decimal_update(self):