switch {
		case name == "TestMain":
			if isTestFunc(n, "T") {
				t.Tests = append(t.Tests, testFunc{pkg, name, "", false})
				*doImport, *seen = true, true
				continue
			}
			err := checkTestFunc(n, "M")
			if err != nil {
				return err
			}
			if t.TestMain != nil {
				return errors.New("multiple definitions of TestMain")
			}
			t.TestMain = &testFunc{pkg, name, "", false}

	// It should contain a crash report such as this:
	//
	// panic: oops
	//
	// goroutine 1 [running]:
	// runtime/debug_test.TestMain(0x1400007e0a0)
	// 	GOROOT/src/runtime/debug/stack_test.go:33 +0x18c
	// main.main()
	// 	_testmain.go:71 +0x170
	data, err := os.ReadFile(crashOutput)
	if err != nil {
		t.Fatalf("child process failed to write crash report: %v", err)
	}
	crash := string(data)

// See the License for the specific language governing permissions and
// limitations under the License.

package aggregate

import (
	"testing"

	"istio.io/istio/tests/util/leak"
)

func TestMain(m *testing.M) {
	// CheckMain asserts that no goroutines are leaked after a test package exits.
	leak.CheckMain(m)

// See the License for the specific language governing permissions and
// limitations under the License.

package kclient

import (
	"testing"

	"istio.io/istio/tests/util/leak"
)

func TestMain(m *testing.M) {
	// CheckMain asserts that no goroutines are leaked after a test package exits.
	leak.CheckMain(m)

// See the License for the specific language governing permissions and
// limitations under the License.

package krt

import (
	"testing"

	"istio.io/istio/tests/util/leak"
)

func TestMain(m *testing.M) {
	// CheckMain asserts that no goroutines are leaked after a test package exits.
	leak.CheckMain(m)

// See the License for the specific language governing permissions and
// limitations under the License.

package citadel

import (
	"testing"

	"istio.io/istio/tests/util/leak"
)

func TestMain(m *testing.M) {
	// CheckMain asserts that no goroutines are leaked after a test package exits.
	leak.CheckMain(m)

it is bootstrapped by a Go `TestMain`, which has the same restriction.

To begin, create a new folder for your suite under
[tests/integration](https://github.com/istio/istio/tree/master/tests/integration).

```console
$ cd ${ISTIO}/tests/integration
$ mkdir mysuite
```

Within that package, create a `TestMain` to bootstrap the test suite:

```go
func TestMain(m *testing.M) {
    framework.

func isOpen() bool {
	openedMu.Lock()
	defer openedMu.Unlock()
	return opened
}

// Open enables telemetry data writing to disk.
// This is supposed to be called once during the program execution
// (i.e. typically in TestMain), and must not be used with
// golang.org/x/telemetry/counter.Open.
func Open(telemetryDir string) {
	openedMu.Lock()
	defer openedMu.Unlock()
	if opened {
		panic("Open was called more than once")
	}

// See the License for the specific language governing permissions and
// limitations under the License.

package server

import (
	"testing"

	"istio.io/istio/tests/util/leak"
)

func TestMain(m *testing.M) {
	// CheckMain asserts that no goroutines are leaked after a test package exits.
	leak.CheckMain(m)

// See the License for the specific language governing permissions and
// limitations under the License.

package inject

import (
	"testing"

	"istio.io/istio/tests/util/leak"
)

func TestMain(m *testing.M) {
	// CheckMain asserts that no goroutines are leaked after a test package exits.
	leak.CheckMain(m)