Here and here, we compare the elapsed time from the NetworkInterfaceTL with fixed values. However, the NetworkInterfaceTL measures its result from when it started the command. We should use OperationContext::setDeadlineByDate(...) instead of OperationContext:: setDeadlineAfterNowBy(...) and record the delay from our source data (without additional timeout) until after we invoke runCommand(). We can then compare the elapsed time with the timeouts minus the delay.