[coffeebeqn]

So unless I pepper every test and subtest with t.Parallel() it will always run sequentially ? I gotta try that. Also I wish I could just declare that once

[rickette]

Tests inside one _test.go file are run sequentially by default, but Go does run tests in parallel across packages.

[hdra]

what about multiple _test.go files belonging to the same package? and how does this work with "sub-packages"?

[4death4]

If you use suites you can run t.Parallel() once for the entire suite.

[kbolino]

You should wait until you actually need it. Parallel tests can produce interleaved output.