go test -v -run Test -skip T skip_test.go
! stdout RUN
stdout '^ok.*\[no tests to run\]'

go test -v -skip T skip_test.go
! stdout RUN

go test -v -skip 1 skip_test.go
! stdout Test1
stdout RUN.*Test2
stdout RUN.*Test2/3

go test -v -skip 2/3 skip_test.go
stdout RUN.*Test1
stdout RUN.*Test2
stdout RUN.*ExampleTest1
! stdout Test2/3

go test -v -skip 2/4 skip_test.go
stdout RUN.*Test1
stdout RUN.*Test2
stdout RUN.*Test2/3
stdout RUN.*ExampleTest1

go test -v -skip Example skip_test.go
stdout RUN.*Test1
stdout RUN.*Test2
stdout RUN.*Test2/3
! stdout ExampleTest1

-- skip_test.go --
package skip_test

import "testing"

func Test1(t *testing.T) {
}

func Test2(t *testing.T) {
	t.Run("3", func(t *testing.T) {})
}

func ExampleTest1() {
	// Output:
}