diff --git a/src/DotNext.Tests/Threading/AsyncReaderWriterLockTests.cs b/src/DotNext.Tests/Threading/AsyncReaderWriterLockTests.cs
index dc512c6a2..6fa4b857b 100644
--- a/src/DotNext.Tests/Threading/AsyncReaderWriterLockTests.cs
+++ b/src/DotNext.Tests/Threading/AsyncReaderWriterLockTests.cs
@@ -226,7 +226,7 @@ public static void DisposedWhenSynchronousWriteLockAcquired()
     [Fact]
     public static void AcquireReadWriteLockSynchronously()
     {
-        var l = new AsyncReaderWriterLock();
+        using var l = new AsyncReaderWriterLock();
         True(l.TryEnterReadLock(DefaultTimeout));
         True(l.TryEnterReadLock(DefaultTimeout));
         Equal(2L, l.CurrentReadCount);
@@ -247,11 +247,11 @@ public static void AcquireReadWriteLockSynchronously()
     [Fact]
     public static void ResumeMultipleReadersSynchronously()
     {
-        var l = new AsyncReaderWriterLock();
+        using var l = new AsyncReaderWriterLock();
         True(l.TryEnterWriteLock());
 
-        var t1 = new Thread(() => True(l.TryEnterReadLock(DefaultTimeout))) { IsBackground = true };
-        var t2 = new Thread(() => True(l.TryEnterReadLock(DefaultTimeout))) { IsBackground = true };
+        var t1 = new Thread(TryEnterReadLock) { IsBackground = true };
+        var t2 = new Thread(TryEnterReadLock) { IsBackground = true };
         t1.Start();
         t2.Start();
         
@@ -260,5 +260,7 @@ public static void ResumeMultipleReadersSynchronously()
         True(t2.Join(DefaultTimeout));
         
         Equal(2L, l.CurrentReadCount);
+
+        void TryEnterReadLock() => True(l.TryEnterReadLock(DefaultTimeout));
     }
 }
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diff --git a/src/DotNext.Tests/Threading/AsyncResetEventTests.cs b/src/DotNext.Tests/Threading/AsyncResetEventTests.cs
index b21866313..09c82ceb0 100644
--- a/src/DotNext.Tests/Threading/AsyncResetEventTests.cs
+++ b/src/DotNext.Tests/Threading/AsyncResetEventTests.cs
@@ -127,4 +127,15 @@ public static void ManualResetEventSynchronousCompletion(IAsyncResetEvent resetE
             Equal(resetEvent.ResetMode is EventResetMode.ManualReset, resetEvent.IsSet);
         }
     }
+
+    [Theory]
+    [MemberData(nameof(GetResetEvents))]
+    public static void AlreadySignaledEvents(IAsyncResetEvent resetEvent)
+    {
+        using (resetEvent)
+        {
+            True(resetEvent.Signal());
+            True(resetEvent.Wait(DefaultTimeout));
+        }
+    }
 }
\ No newline at end of file