diff --git a/tests/provenance/test_llms_real_tracking.py b/tests/provenance/test_llms_real_tracking.py
index 94ba8588..10d5f032 100644
--- a/tests/provenance/test_llms_real_tracking.py
+++ b/tests/provenance/test_llms_real_tracking.py
@@ -109,7 +109,7 @@ class TestRealLLMProvenanceTracking:
             assert lineage is not None
             total_cost += lineage["metadata"]["total_cost"]
         
-        assert total_cost == sum(costs)
+        assert total_cost == pytest.approx(sum(costs))
     
     def test_llm_latency_tracking(self):
         """Test that LLM latency is tracked."""