TST warning class should be passed as the category parameter.

lesteve · lesteve · commit bc98f587fd6b · 2018-07-17T21:21:31.000+02:00
The first argument is the test callable. Doing it like this cause the test
function to not be called
diff --git a/sklearn/linear_model/tests/test_sgd.py b/sklearn/linear_model/tests/test_sgd.py
@@ -319,7 +319,7 @@ def test_validation_set_not_used_for_training(self):
 
         assert_array_equal(clf1.coef_, clf2.coef_)
 
-    @ignore_warnings(ConvergenceWarning)
+    @ignore_warnings(category=ConvergenceWarning)
     def test_n_iter_no_change(self):
         # test that n_iter_ increases monotonically with n_iter_no_change
         for early_stopping in [True, False]:
