diff --git a/GFramework.Core.Tests/coroutine/CoroutineComposeExtensionsTests.cs b/GFramework.Core.Tests/coroutine/CoroutineComposeExtensionsTests.cs
index 655cc6d..52dba5b 100644
--- a/GFramework.Core.Tests/coroutine/CoroutineComposeExtensionsTests.cs
+++ b/GFramework.Core.Tests/coroutine/CoroutineComposeExtensionsTests.cs
@@ -117,7 +117,7 @@ public class CoroutineComposeExtensionsTests
             combined.Current.Update(0.016);
         }
 
-        Assert.That(executionOrder, Is.EqualTo(new[] { 1, 2, 3 }));
+        Assert.That(executionOrder, Is.EqualTo([1, 2, 3]));
     }
 
     /// <summary>
diff --git a/GFramework.Core.Tests/coroutine/CoroutineExtensionsTests.cs b/GFramework.Core.Tests/coroutine/CoroutineExtensionsTests.cs
index e39866c..e9fe8ce 100644
--- a/GFramework.Core.Tests/coroutine/CoroutineExtensionsTests.cs
+++ b/GFramework.Core.Tests/coroutine/CoroutineExtensionsTests.cs
@@ -109,8 +109,7 @@ public class CoroutineExtensionsTests
     [Test]
     public void ExecuteAfter_Should_Return_Valid_Coroutine()
     {
-        var called = false;
-        var coroutine = CoroutineExtensions.ExecuteAfter(1.0, () => called = true);
+        var coroutine = CoroutineExtensions.ExecuteAfter(1.0, () => _ = true);
 
         Assert.That(coroutine, Is.InstanceOf<IEnumerator<IYieldInstruction>>());
     }
diff --git a/GFramework.Core.Tests/coroutine/CoroutineHelperTests.cs b/GFramework.Core.Tests/coroutine/CoroutineHelperTests.cs
index 0f80f79..cf948ff 100644
--- a/GFramework.Core.Tests/coroutine/CoroutineHelperTests.cs
+++ b/GFramework.Core.Tests/coroutine/CoroutineHelperTests.cs
@@ -162,8 +162,7 @@ public class CoroutineHelperTests
     [Test]
     public void DelayedCall_Should_Return_IEnumerator()
     {
-        var called = false;
-        var coroutine = CoroutineHelper.DelayedCall(1.0, () => called = true);
+        var coroutine = CoroutineHelper.DelayedCall(1.0, () => _ = true);
 
         Assert.That(coroutine, Is.InstanceOf<IEnumerator<IYieldInstruction>>());
     }
@@ -300,8 +299,7 @@ public class CoroutineHelperTests
     [Test]
     public void DelayedCall_Should_Handle_Negative_Delay()
     {
-        var called = false;
-        var coroutine = CoroutineHelper.DelayedCall(-1.0, () => called = true);
+        var coroutine = CoroutineHelper.DelayedCall(-1.0, () => _ = true);
 
         Assert.That(coroutine, Is.Not.Null);
         Assert.DoesNotThrow(() => coroutine.MoveNext());
diff --git a/GFramework.Core/coroutine/extensions/CoroutineExtensions.cs b/GFramework.Core/coroutine/extensions/CoroutineExtensions.cs
index 7aed1c7..24d232e 100644
--- a/GFramework.Core/coroutine/extensions/CoroutineExtensions.cs
+++ b/GFramework.Core/coroutine/extensions/CoroutineExtensions.cs
@@ -17,7 +17,7 @@ public static class CoroutineExtensions
     /// <returns>协程枚举器</returns>
     public static IEnumerator<IYieldInstruction> RepeatEvery(
         double interval,
-        Action action,
+        Action? action,
         int? count = null)
     {
         if (count is < 0) yield break;