diff --git a/src/CHttpServer/CHttpServer/CHttpServer.csproj b/src/CHttpServer/CHttpServer/CHttpServer.csproj
index 453914e..8aed059 100644
--- a/src/CHttpServer/CHttpServer/CHttpServer.csproj
+++ b/src/CHttpServer/CHttpServer/CHttpServer.csproj
@@ -14,7 +14,7 @@
   </PropertyGroup>
 
   <PropertyGroup Condition="$(TargetFramework) == 'net11.0'">
-    <Features>$(Features);runtime-async=on</Features>
+    <Features>$(Features);runtime-async=off</Features>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/tests/CHttpServer.Tests/CHttpServerIntegrationTests.cs b/tests/CHttpServer.Tests/CHttpServerIntegrationTests.cs
index 778708a..d3823eb 100644
--- a/tests/CHttpServer.Tests/CHttpServerIntegrationTests.cs
+++ b/tests/CHttpServer.Tests/CHttpServerIntegrationTests.cs
@@ -1,11 +1,9 @@
 using System.Net;
-using System.Net.Http.Json;
 using System.Text;
 
 namespace CHttpServer.Tests;
 
 [Collection(nameof(VanilaCHttpServerIntegrationTests))]
-[CollectionDefinition(DisableParallelization = true)]
 public class VanilaCHttpServerIntegrationTests : CHttpServerIntegrationTests, IClassFixture<TestServer>
 {
     private const int Port = 7222;
@@ -17,7 +15,6 @@ public VanilaCHttpServerIntegrationTests(TestServer testServer) : base(testServe
 }
 
 [Collection(nameof(PriorityCHttpServerIntegrationTests))]
-[CollectionDefinition(DisableParallelization = true)]
 public class PriorityCHttpServerIntegrationTests : CHttpServerIntegrationTests, IClassFixture<TestServer>
 {
     private const int Port = 7223;