@@ -740,15 +740,19 @@ def test_vectorized_hamiltonian_evaluation():

     )

-def test_vectorized_requires_norbs():

+@pytest.mark.parametrize("sym", [

+    builder.NoSymmetry(),

+    kwant.TranslationalSymmetry([-1]),

+])

+def test_vectorized_requires_norbs(sym):

     # Catch deprecation warning for lack of norbs

     with warnings.catch_warnings():

         warnings.simplefilter("ignore")

-        fam = builder.SimpleSiteFamily()

+        lat = kwant.lattice.chain()

-    syst = builder.Builder(vectorize=True)

-    syst[fam(0, 0)] = 1

+    syst = builder.Builder(sym, vectorize=True)

+    syst[lat(0)] = 1

     raises(ValueError, syst.finalized)