Test fixed

src/Squidex.Infrastructure/DisposableObjectBase.cs

@@ -14,6 +14,7 @@ namespace Squidex.Infrastructure
     {
         private readonly object disposeLock = new object();
         private bool isDisposed;
+
         public bool IsDisposed
         {
             get

tests/Squidex.Infrastructure.Tests/UsageTracking/BackgroundUsageTrackerTests.cs

@@ -143,10 +143,11 @@ namespace Squidex.Infrastructure.UsageTracking
             await sut.TrackAsync("key3", 0.5, 6000);
 
             sut.Next();
-            sut.Dispose();
 
             await Task.Delay(100);
 
+            sut.Dispose();
+
             usageStore.VerifyAll();
         }
     }