diff --git a/SafeExamBrowser.Runtime.UnitTests/Communication/RuntimeHostTests.cs b/SafeExamBrowser.Runtime.UnitTests/Communication/RuntimeHostTests.cs
index b498bf01..9b0f95fd 100644
--- a/SafeExamBrowser.Runtime.UnitTests/Communication/RuntimeHostTests.cs
+++ b/SafeExamBrowser.Runtime.UnitTests/Communication/RuntimeHostTests.cs
@@ -288,6 +288,7 @@ namespace SafeExamBrowser.Runtime.UnitTests.Communication
 			sut.Send(new MessageBoxReplyMessage(Guid.Empty, MessageBoxResult.Cancel) { CommunicationToken = token });
 			sut.Send(new PasswordReplyMessage(Guid.Empty, false, "") { CommunicationToken = token });
 			sut.Send(new ReconfigurationMessage("") { CommunicationToken = token });
+			sut.Disconnect(new DisconnectionMessage { CommunicationToken = token });
 		}
 
 		private class TestMessage : Message { };