diff --git a/FlakyTests/FlakyTests.cs b/FlakyTests/FlakyTests.cs
index 02a064e..6aa59b1 100644
--- a/FlakyTests/FlakyTests.cs
+++ b/FlakyTests/FlakyTests.cs
@@ -9,6 +9,7 @@ public class FailingTests
         
         public FailingTests()
         {
+            // every test gets its own random id.
             var random = new Random(DateTime.Now.Millisecond);
             randomId = random.Next(1, 10);
             Console.WriteLine($"randomId: {randomId}");