diff --git a/tests/eko/kernels/test_ns.py b/tests/eko/kernels/test_ns.py
index 7b3c16a3c..013fc5433 100644
--- a/tests/eko/kernels/test_ns.py
+++ b/tests/eko/kernels/test_ns.py
@@ -202,8 +202,9 @@ def test_ode_n3lo():
             np.testing.assert_allclose(lhs, rhs)
 
 
-def test_error():
-    with pytest.raises(ValueError):
+def test_error(monkeypatch):
+    monkeypatch.setattr("eko.beta.beta_qcd", lambda *_args: 1.0)
+    with pytest.raises(NotImplementedError, match="order is not implemented"):
         ns.dispatcher((5, 0), "iterate-exact", np.random.rand(3) + 0j, 0.2, 0.1, 3, 10)
     with pytest.raises(NotImplementedError):
         ad.gamma_ns((2, 0), 10202, 1, 3)