diff --git a/test/rmgpy/molecule/groupTest.py b/test/rmgpy/molecule/groupTest.py
index 8aa98a1826e..1a6c3d2879b 100644
--- a/test/rmgpy/molecule/groupTest.py
+++ b/test/rmgpy/molecule/groupTest.py
@@ -338,7 +338,7 @@ def test_apply_action_lose_charge(self):
                     assert a in atom.atomtype,"LOSE_CHARGE on {0} gave {1} not {2}".format(atomtype, atom.atomtype,
                                                                                   atomtype.decrement_charge)
                 # self.assertEqual(atom0.radical_electrons, [r - 1 for r in atom.radical_electrons])
-                assert atom0.charge == [c - 1 for c in atom.charge]
+                assert atom0.charge == [c + 1 for c in atom.charge]
                 assert atom0.label == atom.label
                 assert atom0.lone_pairs == atom.lone_pairs
             except ActionError: