diff --git a/tests/test_evo.py b/tests/test_evo.py
index 08f118ed..4ef2a128 100644
--- a/tests/test_evo.py
+++ b/tests/test_evo.py
@@ -419,8 +419,12 @@ def test_int_stop_calling_details(self, ham_rcr_psi):
         # check that TypeError not related to argument count gets properly
         #   raised
         with raises(TypeError):
+
+            def int_step(t, p, H):
+                raise TypeError("Something else.")
+
             sim = qu.Evolution(p0, ham, method='integrate',
-                               int_stop=7)
+                               int_stop=int_step)
             sim.update_to(trc)
 
     def test_evo_at_times(self):