diff --git a/Assets/Tests/AsyncTest.cs b/Assets/Tests/AsyncTest.cs
index d0931bc..b6f1833 100644
--- a/Assets/Tests/AsyncTest.cs
+++ b/Assets/Tests/AsyncTest.cs
@@ -195,7 +195,6 @@ namespace UniRx.AsyncTests
 
             var currentThreadId = Thread.CurrentThread.ManagedThreadId;
 
-            UnityEngine.Debug.Log("Before:" + currentThreadId);
 
 
             await UniTask.SwitchToThreadPool();
@@ -209,7 +208,6 @@ namespace UniRx.AsyncTests
 
             var switchedThreadId = Thread.CurrentThread.ManagedThreadId;
 
-            UnityEngine.Debug.Log("After:" + switchedThreadId);
 
 
             currentThreadId.Should().NotBe(switchedThreadId);
diff --git a/Assets/UniRx.Async/EnumeratorAsyncExtensions.cs b/Assets/UniRx.Async/EnumeratorAsyncExtensions.cs
index 62b968e..0f6c5a6 100644
--- a/Assets/UniRx.Async/EnumeratorAsyncExtensions.cs
+++ b/Assets/UniRx.Async/EnumeratorAsyncExtensions.cs
@@ -232,14 +232,6 @@ namespace UniRx.Async
                 };
             }
 
-            static IEnumerator UnwrapEnumerator(IEnumerator enumerator)
-            {
-                while (enumerator.MoveNext())
-                {
-                    yield return null;
-                }
-            }
-
             static IEnumerator UnwrapWaitAsyncOperation(AsyncOperation asyncOperation)
             {
                 while (!asyncOperation.isDone)
diff --git a/Assets/UniRx.Async/PlayerLoopHelper.cs b/Assets/UniRx.Async/PlayerLoopHelper.cs
index 7d2c8bb..326edf7 100644
--- a/Assets/UniRx.Async/PlayerLoopHelper.cs
+++ b/Assets/UniRx.Async/PlayerLoopHelper.cs
@@ -67,13 +67,33 @@ namespace UniRx.Async
             var yieldLoop = new PlayerLoopSystem
             {
                 type = loopRunnerYieldType,
+#if UNITY_EDITOR
+                updateDelegate = () =>
+                {
+                    if (Application.isPlaying)
+                    {
+                        cq.Run();
+                    }
+                }
+#else
                 updateDelegate = cq.Run
+#endif
             };
 
             var runnerLoop = new PlayerLoopSystem
             {
                 type = loopRunnerType,
+#if UNITY_EDITOR
+                updateDelegate = () =>
+                {
+                    if (Application.isPlaying)
+                    {
+                        runner.Run();
+                    }
+                }
+#else
                 updateDelegate = runner.Run
+#endif
             };
 
             var dest = new PlayerLoopSystem[loopSystem.subSystemList.Length + 2];