diff --git a/src/gufe/tests/test_protocoldag.py b/src/gufe/tests/test_protocoldag.py
index f1c22c5f..eef926dc 100644
--- a/src/gufe/tests/test_protocoldag.py
+++ b/src/gufe/tests/test_protocoldag.py
@@ -160,7 +160,7 @@ def test_execute_dag(
         if keep_shared:
             assert shared_storage.exists(shared_file)
         else:
-            assert not os.path.exists(shared_file)
+            assert not shared_storage.exists(shared_file)
         if keep_scratch:
             assert os.path.exists(scratch_file)
         else: