Updated tests

Author: radarhere

Tests/test_imagegrab.py

@@ -66,9 +66,7 @@ def test_grabclipboard(self):
         else:
             with pytest.raises(NotImplementedError) as e:
                 ImageGrab.grabclipboard()
-            self.assertEqual(
-                str(e.value), "ImageGrab.grabclipboard() is macOS and Windows only"
-            )
+            assert str(e.value) == "ImageGrab.grabclipboard() is macOS and Windows only"
             return
 
         im = ImageGrab.grabclipboard()