diff --git a/test/Discord.Net.Tests.Unit/MockedEntities/MockedGroupChannel.cs b/test/Discord.Net.Tests.Unit/MockedEntities/MockedGroupChannel.cs
index 3330b7bce..9c94efffa 100644
--- a/test/Discord.Net.Tests.Unit/MockedEntities/MockedGroupChannel.cs
+++ b/test/Discord.Net.Tests.Unit/MockedEntities/MockedGroupChannel.cs
@@ -16,6 +16,8 @@ namespace Discord
 
         public ulong Id => throw new NotImplementedException();
 
+        public string RTCRegion => throw new NotImplementedException();
+
         public Task<IAudioClient> ConnectAsync(bool selfDeaf = false, bool selfMute = false, bool external = false)
         {
             throw new NotImplementedException();