diff --git a/tests/test_market_models.py b/tests/test_market_models.py
index 2aec368e..d9e92713 100644
--- a/tests/test_market_models.py
+++ b/tests/test_market_models.py
@@ -41,8 +41,8 @@ def test_total_lmp_property(self):
 
     def test_defaults_zero_congestion_and_loss(self):
         lmp = LMPRate(energy_rate=40.0)
-        assert lmp.congestion_rate == 0.0
-        assert lmp.loss_rate == 0.0
+        assert lmp.congestion_rate == pytest.approx(0.0)
+        assert lmp.loss_rate == pytest.approx(0.0)
         assert lmp.total_lmp == pytest.approx(40.0)