diff --git a/backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/JintScriptEngine.cs b/backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/JintScriptEngine.cs
index e6ca2c950..bcfc597df 100644
--- a/backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/JintScriptEngine.cs
+++ b/backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/JintScriptEngine.cs
@@ -5,7 +5,6 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
-using System.Diagnostics;
 using Esprima;
 using Jint;
 using Jint.Native;
diff --git a/backend/src/Squidex.Domain.Apps.Entities/AppProviderExtensions.cs b/backend/src/Squidex.Domain.Apps.Entities/AppProviderExtensions.cs
index ac5608af1..5f9fae277 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/AppProviderExtensions.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/AppProviderExtensions.cs
@@ -5,9 +5,6 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
-using System.Collections.Generic;
-using System.Threading;
-using System.Threading.Tasks;
 using Squidex.Domain.Apps.Core.Schemas;
 using Squidex.Domain.Apps.Entities.Schemas;
 using Squidex.Infrastructure;
diff --git a/backend/src/Squidex/Config/Orleans/OrleansServices.cs b/backend/src/Squidex/Config/Orleans/OrleansServices.cs
index 36a5f075d..02fa456bb 100644
--- a/backend/src/Squidex/Config/Orleans/OrleansServices.cs
+++ b/backend/src/Squidex/Config/Orleans/OrleansServices.cs
@@ -5,7 +5,6 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
-using System;
 using System.Globalization;
 using System.Net;
 using System.Net.Sockets;
diff --git a/backend/tests/Squidex.Domain.Apps.Entities.Tests/Assets/DomainObject/Guards/ScriptingExtensionsTests.cs b/backend/tests/Squidex.Domain.Apps.Entities.Tests/Assets/DomainObject/Guards/ScriptingExtensionsTests.cs
index 9bf81d1e1..3d914be7d 100644
--- a/backend/tests/Squidex.Domain.Apps.Entities.Tests/Assets/DomainObject/Guards/ScriptingExtensionsTests.cs
+++ b/backend/tests/Squidex.Domain.Apps.Entities.Tests/Assets/DomainObject/Guards/ScriptingExtensionsTests.cs
@@ -8,7 +8,6 @@
 using FakeItEasy;
 using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Options;
 using Squidex.Domain.Apps.Core.Assets;
 using Squidex.Domain.Apps.Core.Scripting;
 using Squidex.Domain.Apps.Entities.Assets.Commands;
@@ -89,13 +88,6 @@ namespace Squidex.Domain.Apps.Entities.Assets.DomainObject.Guards
             A.CallTo(() => app.AssetScripts)
                 .Returns(scripts);
 
-            var scriptEngine = new JintScriptEngine(new MemoryCache(Options.Create(new MemoryCacheOptions())),
-                Options.Create(new JintScriptOptions
-                {
-                    TimeoutScript = TimeSpan.FromSeconds(2),
-                    TimeoutExecution = TimeSpan.FromSeconds(10)
-                }));
-
             var serviceProvider =
                 new ServiceCollection()
                     .AddMemoryCache()