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:

I use this plugin

Ionic version 3
Cordova 8