better test

Author: CamDavidsonPilon

lifelines/tests/test_estimation.py

@@ -2962,7 +2962,10 @@ def test_fit_kwargs_works_for_semiparametric(self, cph, rossi, capfd):
         assert "step_size = 0.1000" in out
 
     def test_fit_kwargs_works_for_spline_model(self, cph_spline, rossi, capfd):
-        cph_spline.fit(rossi, "week", "arrest", fit_options={"step_size": 0.1}, show_progress=True)
+        with pytest.raises(ConvergenceError):
+            cph_spline.fit(rossi, "week", "arrest", fit_options={"maxiter": 10}, show_progress=True)
+
+        cph_spline.fit(rossi, "week", "arrest", fit_options={"maxiter": 1000}, show_progress=True)
         assert True
 
     def test_parametric_models_can_do_interval_censoring(self, cph_spline, cph_pieces):