parallel.test-inspector-debug-brk-flag is flaky #49900

not ok 2006 parallel/test-inspector-debug-brk-flag
  ---
  duration_ms: 15271.91900
  severity: fail
  exitcode: 1
  stack: |-
    [test] Connecting to a child Node process
    [test] Testing /json/list
    [err] Debugger listening on ws://127.0.0.1:35797/6d6da8b1-8b1b-411c-a183-47d37f88ba69
    [err] For help, see: https://nodejs.org/en/docs/inspector
    [err] 
    [err] Debugger attached.
    [err] 
    Timed out waiting for matching notification (break on file:///home/iojs/build/workspace/node-test-commit-linuxone/test/fixtures/loop.js:0)
    1
  ...