remove knownfailureif reference

pizzathief · pizzathief · commit e812aac8fc82 · 2016-01-21T12:09:06.000+11:00
diff --git a/lib/matplotlib/testing/decorators.py b/lib/matplotlib/testing/decorators.py
@@ -220,7 +220,7 @@ def test(self):
                     will_fail = True
                     fail_msg = 'Do not have baseline image %s' % expected_fname
 
-                @knownfailureif(
+                @pytest.mark.xfail(
                     will_fail, fail_msg,
                     known_exception_class=ImageComparisonFailure)
                 def do_test():
