diff --git a/python/tests/test_Geom.py b/python/tests/test_Geom.py
index 041e1a01f..1d1c32992 100644
--- a/python/tests/test_Geom.py
+++ b/python/tests/test_Geom.py
@@ -51,13 +51,9 @@ class TestGeom:
             new = Geom.from_file(f)
         assert geom_equal(new,default)
 
-    def test_pack(self,default,tmpdir):
-        default.to_file(tmpdir.join('default.geom'),pack=True)
-        new = Geom.from_file(tmpdir.join('default.geom'))
-        assert geom_equal(new,default)
-
-    def test_plain(self,default,tmpdir):
-        default.to_file(tmpdir.join('default.geom'),pack=False)
+    @pytest.mark.parametrize('pack',[True,False])
+    def test_pack(self,default,tmpdir,pack):
+        default.to_file(tmpdir.join('default.geom'),pack=pack)
         new = Geom.from_file(tmpdir.join('default.geom'))
         assert geom_equal(new,default)