SO SHINY

tests/test_make.py

@@ -539,25 +539,21 @@ def test_sugar_factory_mutex(self):
         """
         Passing both default and factory raises ValueError.
         """
-        with pytest.raises(ValueError) as ei:
+        with pytest.raises(ValueError, match="mutually exclusive"):
             @attr.s
             class C(object):
                 x = attr.ib(factory=list, default=Factory(list))
 
-        assert "mutually exclusive" in ei.value.args[0]
-
     def test_sugar_callable(self):
         """
         Factory has to be a callable to prevent people from passing Factory
         into it.
         """
-        with pytest.raises(ValueError) as ei:
+        with pytest.raises(ValueError, match="must be a callable"):
             @attr.s
             class C(object):
                 x = attr.ib(factory=Factory(list))
 
-        assert "must be a callable" in ei.value.args[0]
-
 
 @attr.s
 class GC(object):