Visual Studio Code - Insiders: 1.36.0-insider
python-insider: 2019.6.21464-rc

Repro steps:

1. Input below code:

def test_passing():
    assert 42 == 42
def test_failure():
    assert 42 == -13

2. Run tests with pytest framework
3. Run all tests

Actual Result:
No code lenses shown after run all tests

Expect Result:
It should display code lenses