add.go

package add

func Add(a, b int) int {
	return a + b
}

add_test.go

package add

import "testing"

func TestAdd(t *testing.T) {
	t.Run("should add 1 and 1", func(t *testing.T) {
		got := Add(1, 1)

		if got != 2 {
			t.Error("Did not get right sum")
		}
	})

	t.Run("should add 1 and 2", func(t *testing.T) {
		got := Add(1, 2)

		if got != 3 {
			t.Error("Did not get right sum")
		}
	})
}

I am currently running go 1.7.1.

> go version
go version go1.7.1 linux/amd64

Running the test functions as expected.

> go test
PASS
ok      _/tmp/mock_tests    0.002s

Running the tests with the verbose flag works as expected.

> go test -v 
=== RUN   TestAdd
=== RUN   TestAdd/should_add_1_and_1
=== RUN   TestAdd/should_add_1_and_2
--- PASS: TestAdd (0.00s)
    --- PASS: TestAdd/should_add_1_and_1 (0.00s)
    --- PASS: TestAdd/should_add_1_and_2 (0.00s)
PASS
ok      _/tmp/mock_tests    0.001s