OnePlus Expresso Test Run Issue (Android Studio 3.6.2)

Issue

I am an Android Developer and facing a very serious issue that isn't mentioned anywhere with solution.

I am trying to run Expresso automated tests on my oneplus6t. But every single time from a year I am unable to test.

The error message is something like this:

"Testing started at 09:46 AM ...
04/20 09:46:21: Launching 'ASyncSettingsTest' on OnePlus ONEPLUS A6010.
Running tests
$ adb shell am instrument -w -r -e debug false -e class 'com.declaree.declaree.ASyncSettingsTest' com.demo.test/androidx.test.runner.AndroidJUnitRunner
Timed out waiting for process (com.demo) to appear on oneplus-oneplus_a6010-21663687."

It's working in emulators and other manufacturing devices like pixel, moto, Samsung.

I do not find anything like this in the developer option too.

For tests to run, I have to open the application on my own then it runs.

FYI: Reboot, Reset, Wipe Cache doesn't work.

I am working in Android Studio 3.6.2

Does anybody have any solution? Thanks in advance.

Solution

It is somehow related to oneplus specific restrictions of background work.

To get rid of this, go

Settings -> Battery -> Battery optimization -> Your app (not package.test but application) -> Don't optimize -> Done

Works on OnePlus 3t.

Answered By - Vladislav Yundin