diff --git a/tests/test_nexus_api.py b/tests/test_nexus_api.py
index 8af184a..9453594 100644
--- a/tests/test_nexus_api.py
+++ b/tests/test_nexus_api.py
@@ -509,10 +509,10 @@ class TestUtilityFunctions:
         decay = Decimal("1.0")  # 1 PEC
         ammo = Decimal("1.0")   # 1 PEC
         
-        # Total cost = 2 PEC = 0.02 PED
-        # DPP = 10 / 0.02 = 500
+        # Total cost = 2 PEC
+        # DPP = damage / total_pec = 10 / 2 = 5.0
         dpp = calculate_dpp(damage, decay, ammo)
-        assert dpp == Decimal("500")
+        assert dpp == Decimal("5.0")
     
     def test_calculate_dpp_zero_cost(self):
         """Test DPP calculation with zero cost."""