How to debug Android In app purchases?

Anyone know, How to debug android in app purchases?

IAP works only in release version. But in release versiondebug mode turned off.

I tried add
<application android:debuggable="true" />

But when I upload my test version to Google Play, error appears:

“Please disable debug mode in your app. More info on: https://developer.android.com/studio/publish/preparing.html#publishing-configure

I use this plugin https://purchase.cordova.fovea.cc/use-cases/non-consumable-android#8-prepare-test-accounts

Ionic version 3
Cordova 8