diff --git a/unittests/test_tool.py b/unittests/test_tool.py
index 5c78eaf47d7da23542d9b7a7dc7c0ff446c984a7..71180b17e22409bc2491a51d4cdd45ed6f4aa346 100755
--- a/unittests/test_tool.py
+++ b/unittests/test_tool.py
@@ -705,7 +705,7 @@ def test_create_reference_mapping():
     assert id(a) in ref
     assert id(b) not in ref
     assert "B" in ref[id(a)]
-    assert ref[id(a)]["B"] is b
+    assert ref[id(a)]["B"] == [b]
 
 
 def test_create_flat_list():