diff --git a/sdk-dotnet/tests/Inferable.Tests/InferableTest.cs b/sdk-dotnet/tests/Inferable.Tests/InferableTest.cs
index 9898d305..f5be14af 100644
--- a/sdk-dotnet/tests/Inferable.Tests/InferableTest.cs
+++ b/sdk-dotnet/tests/Inferable.Tests/InferableTest.cs
@@ -238,7 +238,7 @@ async public void Inferable_Run_E2E()
           Description = "A simple greeting function",
           Func = new Func<TestInput, object?>((input) => {
               didCallSayHello = true;
-              return null;
+              return $"Hello {input.testString}";
           }),
       });