exec go test -v
stdout 'PASS.*TestFoo'

garble test -v
stdout 'PASS.*TestFoo'

garble test -c -vet=off
bingrep bar.test$exe 'TestFoo'
! bingrep bar.test$exe 'ImportedVar'

-- go.mod --
module foo.com/bar
-- bar.go --
package bar

func Foo() string { return "Foo" }

var ImportedVar = "imported var value"
-- bar_test.go --
package bar

import (
	"testing"
)

func TestFoo(t *testing.T) {
	t.Log(ImportedVar)
	if Foo() != "Foo" {
		t.FailNow()
	}
}