Replace deprecated unittest aliases (#836)

diff --git a/src/test_typing.py b/src/test_typing.py
index bddad7b..a987a8d 100644
--- a/src/test_typing.py
+++ b/src/test_typing.py
@@ -1515,8 +1515,8 @@
         self.assertEqual(List[c1], List[c1_gth])
         self.assertNotEqual(List[c1], List[C])
         self.assertNotEqual(List[c1_gth], List[C])
-        self.assertEquals(Union[c1, c1_gth], Union[c1])
-        self.assertEquals(Union[c1, c1_gth, int], Union[c1, int])
+        self.assertEqual(Union[c1, c1_gth], Union[c1])
+        self.assertEqual(Union[c1, c1_gth, int], Union[c1, int])
 
     def test_forward_equality_hash(self):
         c1 = typing._ForwardRef('int')