Test users allows marketers to build and organise test groups and provide insights into the SDK or API logs available from your test device during SDK integration testing.
You can mark upto 1000 users as test users.
Steps
Add new test users
1. Go to Test and Debug on the bottom of your sidebar
2. Click "+ Test user " on the top right to mark users as test users. 
3. You can either mark all the users in the custom segment as Test users or select one or more specific users.
3.a) Select custom segment -
i) If you want to mark all users from a custom segment, click of Select custom segment card.
ii) Select your desired custom segment from the drop down.
iii)You can also run a query to see the count of the users in the selected segment.
iv) Click on Mark as Test to mark these users as test users.
3.b) Select users
i) Click Select users card if you want to mark some selected users as test users.
ii) You can select one of the user identifiers from the drop down.
iii) Enter user detail or a comma separated list incase of multiple users.
iv) Click on Mark as Test to mark these users as test users.
4. Once you click on Mark as test, the selected segments or users would be marked as test. And you will see the user details in the slide-out. 
Note - In case some of the users failed, you will see the failure details in the same slide-out. 
Mark test users from user profile
If you are already on a user profile and want to mark that user as test, click mark as test user on the top right. 
Access test users
1. Go to Test and Debug on the bottom of your sidebar
2. The page will show the details of all the test users.
Access user profile
You can click on the MoEngage user id to go to the user profile page.
View recent events
1. Once you select one or more users, you will see an option (just below the search bar) to see the recent events for the selected users. Click View recent events.
2. The slide-out will show the recent 10 events for the selected users.
