diff --git a/test/test_swap_cancellation.py b/test/test_swap_cancellation.py
index 026e3d6..091d3e4 100644
--- a/test/test_swap_cancellation.py
+++ b/test/test_swap_cancellation.py
@@ -35,7 +35,7 @@ def test_simple(self):
         swap_pass.property_set["virtual_permutation_layout"] = layout
 
         dag = circuit_to_dag(qc)
-        qc2 = dag_to_circuit(swap_pass.run(dag))
+        _ = swap_pass.run(dag)
 
         new_layout = swap_pass.property_set["virtual_permutation_layout"]