// indicates that this package is, in fact, a test main.
		pmain.Internal.TestmainGo = &data
	}

	if done != nil {
		go func() {
			parallelizablePart()
			done()
		}()
	} else {
		parallelizablePart()
	}

	return pmain, ptest, pxtest
}

// recompileForTest copies and replaces certain packages in pmain's dependency