I thought I need just this link https://play.google.com/store/apps/details?id=com.here.myapp.name
to download an app from Play Store, but when I click on it from tester account (which in tester list) I can only see
The link of testing will be https://play.google.com/apps/testing/packagename and you can find that in Alpha/Beta publish tab.
https://play.google.com/apps/publish --> Select app --> Release Management --> App Release --> Alpha/Beta --> Manage --> Opt-in URL (URL for testing)
Updated to add tester (Close test)
Add testers