If we want to simulate a broken HTTP request towards the client, we may wait until the client times out. This results in closing the TCP connection by the client. It then results in failure of the SSL connection at Titan's Abstract_Socket component. The TTCN3-tests fails.
One solution is to actively close the connection via a close function. The client will not wait for the timout. The Abstact_Socket will then not receive any failure. The test runs faster.