diff --git a/qcelemental/tests/test_molecule.py b/qcelemental/tests/test_molecule.py
index 0894e402..340de1aa 100644
--- a/qcelemental/tests/test_molecule.py
+++ b/qcelemental/tests/test_molecule.py
@@ -919,7 +919,7 @@ def test_frag_multiplicity_types_errors(mult_in, validate, error):
 
 
 @pytest.mark.parametrize(
-    "mol_string,args,formula,formula_dict,molecular_weight,nelec, nre",
+    "mol_string,args,formula,formula_dict,molecular_weight,nelec,nre",
     [
         ("He 0 0 0", {}, "He", {"He": 1}, _one_helium_mass, 2, 0.0),
         ("He 0 0 0\n--\nHe 0 0 5", {}, "He2", {"He": 2}, 2 * _one_helium_mass, 4, 0.4233417684),
@@ -932,7 +932,7 @@ def test_frag_multiplicity_types_errors(mult_in, validate, error):
         ("4He 0 0 0", {}, "He", {"He": 1}, _one_helium_mass, 2, 0.0),
         ("5He4 0 0 0", {}, "He", {"He": 1}, 5.012057, 2, 0.0),  # suffix-4 is label
         ("He@3.14 0 0 0", {}, "He", {"He": 1}, 3.14, 2, 0.0),
-    ],
+    ]
 )
 def test_molecular_weight(mol_string, args, formula, formula_dict, molecular_weight, nelec, nre):
     mol = Molecule.from_data(mol_string)