diff --git a/zerver/lib/test_classes.py b/zerver/lib/test_classes.py
index f991494d53..c98069bc31 100644
--- a/zerver/lib/test_classes.py
+++ b/zerver/lib/test_classes.py
@@ -107,14 +107,6 @@ class ZulipTestCase(TestCase):
     functions have to fake out the linter by using a local variable called
     django_client to fool the regext.
     '''
-    def __init__(self, *args, **kwargs):
-        # type: (*Any, **Any) -> None
-        # This method should be removed when we migrate to version 3 of Python
-        import six
-        if six.PY2:
-            self.assertRaisesRegex = self.assertRaisesRegexp
-        super(ZulipTestCase, self).__init__(*args, **kwargs)
-
     DEFAULT_REALM = Realm.objects.get(string_id='zulip')
 
     @instrument_url
diff --git a/zerver/tests/test_decorators.py b/zerver/tests/test_decorators.py
index 46036ea20f..476bcb991d 100644
--- a/zerver/tests/test_decorators.py
+++ b/zerver/tests/test_decorators.py
@@ -40,14 +40,6 @@ from zerver.models import \
 import ujson
 
 class DecoratorTestCase(TestCase):
-    def __init__(self, *args, **kwargs):
-        # type: (*Any, **Any) -> None
-        # This method should be removed when we migrate to version 3 of Python
-        import six
-        if six.PY2:
-            self.assertRaisesRegex = self.assertRaisesRegexp
-        super(TestCase, self).__init__(*args, **kwargs)
-
     def test_get_client_name(self):
         # type: () -> None
         class Request(object):