diff --git a/LiteNetLib.Tests/CommunicationTest.cs b/LiteNetLib.Tests/CommunicationTest.cs
index 5d4c3619..aedb58f1 100644
--- a/LiteNetLib.Tests/CommunicationTest.cs
+++ b/LiteNetLib.Tests/CommunicationTest.cs
@@ -20,7 +20,7 @@ public void WriteNet(NetLogLevel level, string str, params object[] args)
     }
 
     [TestFixture]
-    [Category("Communication")]
+    [Category("Communication"), NonParallelizable]
     public class CommunicationTest
     {
         const int TestTimeout = 4000;