update test_recwarn to new style

testing/test_recwarn.py

@@ -112,12 +112,12 @@ class TestDeprecatedCall(object):
     def test_deprecated_call_as_context_manager_no_warning(self):
         with pytest.raises(pytest.fail.Exception) as ex:
             with pytest.deprecated_call():
-                dep(1)
+                self.dep(1)
         assert str(ex.value) == "DID NOT WARN"
 
     def test_deprecated_call_as_context_manager(self):
         with pytest.deprecated_call():
-            dep(0)
+            self.dep(0)
 
     def test_deprecated_call_pending(self):
         def f():