diff --git a/tests/unit/base_tests_zarrio.py b/tests/unit/base_tests_zarrio.py
index f5bc5520..440850af 100644
--- a/tests/unit/base_tests_zarrio.py
+++ b/tests/unit/base_tests_zarrio.py
@@ -299,7 +299,7 @@ def test_write_references_roundtrip(self):
             bazs.append(Baz(name='baz%d' % i))
         baz_data = BazData(name='baz_data', data=bazs)
         container = BazBucket(bazs=bazs, baz_data=baz_data)
-        manager=get_baz_buildmanager()
+        manager = get_baz_buildmanager()
         # write to file
         with ZarrIO(self.store, manager=manager, mode='w') as writer:
             writer.write(container=container)