Yes, you can unmark a test customer within the customer's profile. This changes a customer's status from test to real customer, which affects how their data is processed and reported in your e-commerce section.
How to Unmark a Test Customer
Go to For Customers > Search.
Use the search filters to find the test customer you want to unmark.
Click on the customer's name to open their profile.
Make sure you're on the Customer Info tab.
In the General Info section, find the Test Customer switch.
Turn off the Test Customer switch — the change is saved automatically.