diff --git a/Capnp.Net.Runtime.Tests/TestBase.cs b/Capnp.Net.Runtime.Tests/TestBase.cs
index 8d94055..ea13c1e 100644
--- a/Capnp.Net.Runtime.Tests/TestBase.cs
+++ b/Capnp.Net.Runtime.Tests/TestBase.cs
@@ -15,7 +15,7 @@ namespace Capnp.Net.Runtime.Tests
     {
         public static int TcpPort = 49152;
         public static int MediumNonDbgTimeout => Debugger.IsAttached ? Timeout.Infinite : 5000;
-        public static int LargeNonDbgTimeout => Debugger.IsAttached ? Timeout.Infinite : 10000;
+        public static int LargeNonDbgTimeout => Debugger.IsAttached ? Timeout.Infinite : 20000;
         public static int ShortTimeout => 500;
 
         public static int GetNextTcpPort()