diff --git a/FlakyTests/NormalTests.cs b/FlakyTests/NormalTests.cs
index e7165d0..61f92b3 100644
--- a/FlakyTests/NormalTests.cs
+++ b/FlakyTests/NormalTests.cs
@@ -27,6 +27,7 @@ public void LongRunningTest(int milliseconds)
         [InlineData(0, 5, 5)]
         [InlineData(100, 100, 200)]
         [InlineData(-5, 5, 0)]
+        [InlineData(-5, 5, 10)]
         public void AddTest(int a, int b, int result)
         {
             var sut = new Sut();