[doughj3]

https://en.wikipedia.org/wiki/Test_of_English_as_a_Foreign_L...

I have seen this used in Grad school applications by ESL students.

[hiccuphippo]

There's also the ECPE https://michiganassessment.org/test-takers/tests/ecpe/

But neither test "native"-ness. Just fluency.