one more error type correction

sawyerbfuller · sawyerbfuller · commit 559a89fa74ba · 2021-11-09T14:10:27.000-08:00
diff --git a/control/tests/mateqn_test.py b/control/tests/mateqn_test.py
@@ -283,7 +283,7 @@ def test_raise(self):
                 cdlyap(A, Q, None, Efq)
             with pytest.raises(ValueError):
                 cdlyap(A, Qfs, None, E)
-            with pytest.raises(ValueError):
+            with pytest.raises(ControlArgument):
                 cdlyap(A, Q, C, E)
 
         B = array([[1, 0], [0, 1]])
