Scheme used for a single unit test?

Rick Mann

In my SPManager app, when I run all unit tests in Xcode, it appears to pick up an environment variable set in Current Scheme->Test->Arguments. But if I click next to a single test in the gutter in the source editor, it does NOT appear to set that same env var.

Does Xcode use a different config when running a single test via the gutter?

Rick Mann