Update tests/test_util.py

Co-authored-by: Gary Yendell <[email protected]>

Author: jsouter

tests/test_util.py

@@ -142,10 +142,5 @@ async def initialise(self):
             subcontroller = ControllerWithWrongType()
             self.register_sub_controller("MySubController", subcontroller)
 
-    with pytest.raises(RuntimeError) as excinfo:
+    with pytest.raises(RuntimeError, match="failed to introspect hinted attribute"):
         Backend(TopController(), loop)
-
-    assert str(excinfo.value) == (
-        "Controller `ControllerWithWrongType` failed to introspect hinted attribute "
-        "`hinted_missing` during initialisation"
-    )