jest --verbose only prints the tests names after all tests had run

[evandrocoan]

🐛 Bug Report

https://repl.it/@evandrocoan/GlossyLustrousFields

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

describe("--verbose does not print each test run", () => {
  test('Running test 1...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 2...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 3...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 4...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 5...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 6...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 7...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 8...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 9...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 10...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 11...', async () => { await sleep(2000); expect(3).toBe(3); });
  test('Running test 12...', async () => { await sleep(2000); expect(3).toBe(3); });
});

Expected behavior

jest --verbose --runInBand

Print: ✓ Running test 1... after running test 1

Print: ✓ Running test 2... after running test 2

Print: ✓ Running test 3... after running test 2

...

Actual behavior

jest --verbose --runInBand

Prints at once all tests run after running all tests:

    ✓ Running test 1... (2026ms)
    ✓ Running test 2... (2015ms)
    ✓ Running test 3... (2004ms)
    ✓ Running test 4... (2003ms)
    ✓ Running test 5... (2056ms)
    ✓ Running test 6... (2095ms)
    ✓ Running test 7... (2006ms)
    ✓ Running test 8... (2006ms)
    ✓ Running test 9... (2002ms)
    ✓ Running test 10... (2005ms)
    ✓ Running test 11... (2003ms)
    ✓ Running test 12... (2008ms)

envinfo

 npx envinfo --preset jest
npx: installed 1 in 2.984s

  System:
    OS: Linux 4.15 Debian GNU/Linux 9 (stretch) 9 (stretch)
    CPU: (4) x64 Intel(R) Xeon(R) CPU @ 2.30GHz
  Binaries:
    Node: 12.16.3 - /usr/local/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.4 - /usr/local/bin/npm
  npmPackages:
    jest: ^24.9.0 => 24.9.0 

[SimenB]

Will be fixed by #6616

[github-actions]

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