Description

We've found an interesting thing during using goleak on our CI, that goleak can detect leaked goroutine from other tests.

Steps to reproduce

1. Use go1.14.1 darwin/amd64
2. Use goleak v1.0.0
3. Run test file below
   goleak_test.go

package goleak_test

import (
	"go.uber.org/goleak"
	"testing"
	"time"
)

func TestA(t *testing.T) {
	go func() {
		for {
			<-time.After(time.Millisecond * 100)
		}
	}()
}

func TestB(t *testing.T) {
	defer goleak.VerifyNone(t)
}

Expected: TestB should pass
Actual: TestB fails with error "found unexpected goroutines:"