diff --git a/Tests/CodexTests/BasicTests/MarketplaceTests.cs b/Tests/CodexTests/BasicTests/MarketplaceTests.cs
index 7cff4aa5..5d69387e 100644
--- a/Tests/CodexTests/BasicTests/MarketplaceTests.cs
+++ b/Tests/CodexTests/BasicTests/MarketplaceTests.cs
@@ -92,9 +92,9 @@ namespace CodexTests.BasicTests
                 var blockRange = geth.ConvertTimeRangeToBlockRange(GetTestRunTimeRange());
                 var slotFilledEvents = contracts.GetSlotFilledEvents(blockRange);
 
-                Debug($"SlotFilledEvents: {slotFilledEvents.Length} - NumSlots: {purchase.MinRequiredNumberOfNodes}");
-
-                if (slotFilledEvents.Length != purchase.MinRequiredNumberOfNodes) throw new Exception();
+                var msg = $"SlotFilledEvents: {slotFilledEvents.Length} - NumSlots: {purchase.MinRequiredNumberOfNodes}";
+                Debug(msg);
+                if (slotFilledEvents.Length != purchase.MinRequiredNumberOfNodes) throw new Exception(msg);
             }, purchase.Expiry + TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(5), "Checking SlotFilled events");
         }