Unit Testing, iOS, DTXProxyChannel error 1

Question

I sometimes start to get the following error

2017-04-02 18:55:22.645937+0200 Stamps[730:111791] Connection peer refused channel request for "dtxproxy:XCTestDriverInterface:XCTestManager_IDEInterface"; channel canceled Failed to run tests: The operation couldn’t be completed. (DTXProxyChannel error 1.)

Last time, when this happened, I just did some random actions with clean my project, remove derived data etc., and it was fixed. Now, it happens again - just after a start of the app, it closes and log contains this error.

What does it mean and is there any workaround here?

I use XCode 8.3, Swift 3.1, test on device 6s with 10.3 installed.

Answer 1

Surprisingly, to fix this, I just replugged my iPhone to another port