diff --git a/BTCPayServer.Tests/FastTests.cs b/BTCPayServer.Tests/FastTests.cs
index cbe84c61d..74f1b4bf0 100644
--- a/BTCPayServer.Tests/FastTests.cs
+++ b/BTCPayServer.Tests/FastTests.cs
@@ -175,6 +175,11 @@ namespace BTCPayServer.Tests
                 ([(0, 0m), (500, 50m), (1000, 100m)], 100, 10m),
                 ([(0, 0m), (100, 100m)], 80, 80m),
                 ([(0, 0m), (100, 100m)], 25, 25m),
+                ([(0, 0m), (25, 25m), (50, 50m), (100, 100m), (110, 120m)], 75, 75m),
+                ([(0, 0m), (25, 0m), (50, 50m), (100, 100m), (110, 0m)], 75, 75m),
+                ([(0, 0m), (25, 0m), (50, 50m), (100, 100m), (110, 0m)], 50, 50m),
+                ([(0, 0m), (25, 0m), (50, 50m), (100, 100m), (110, 0m)], 100, 100m),
+                ([(0, 0m), (25, 0m), (50, 50m), (100, 100m), (110, 0m)], 102, 80m),
             };
             foreach (var t in testData)
             {