timeoutSec *= 3
				break
			}
		}
		return (&goTest{
			timeout: timeoutSec,
			gcflags: gcflags,
			pkgs:    stdMatches,
		}).run(t)
	})
}

func (t *tester) registerRaceBenchTest(pkg string) {
	const raceBenchHeading = "Running benchmarks briefly." // known to addTest for a safety check
	name := testName(pkg, "racebench")
	if t.runRx == nil || t.runRx.MatchString(name) == t.runRxWant {