public IEnumerator ActionExecuteNextFixedUpdate() { // Wait for a new fixed frame yield return(new WaitForFixedUpdate()); Time.fixedDeltaTime = 0.33f; var counter = 0; UnityThread.ExecuteInFixedUpdate(() => { counter += 10; Debug.Log("FixedUpdate loop"); }); // Runner is spawned var runner = GameObject.Find("UnityThreadRunner"); Assert.NotNull(runner); yield return(null); Assert.AreEqual(0, counter); yield return(new WaitForEndOfFrame()); Assert.AreEqual(0, counter); yield return(new WaitForFixedUpdate()); LogAssert.Expect(LogType.Log, "FixedUpdate loop"); Assert.AreEqual(10, counter); }