How to test In App Update In Android Manually

I have implemented In-app update in my app and followed the below mentioned steps to test it,

1. Uninstall the original app from device.

2. Install the app from the Google Play Store

3. Uninstall the app again.

4. Generate signed apk with the new feature, with a lower versionCode than Google Play version Install this apk.

Above mentioned steps will not work in some devices.

So I want to know if there is any alternative way for this testing.