Flaky test_callback_scope/test-resolve-async #18702

not ok 1963 addons-napi/test_callback_scope/test-resolve-async
  ---
  duration_ms: 0.534
  severity: fail
  stack: |-
    (node:23280) Warning: N-API is an experimental feature and could change at any time.
    assert.js:243
        throw err;
        ^
    
    AssertionError [ERR_ASSERTION]: The expression evaluated to a falsy value:
    
      assert(called)
    
        at Timeout.common.mustCall (/home/iojs/build/workspace/node-test-commit-linux/nodes/alpine35-container-x64/test/addons-napi/test_callback_scope/test-resolve-async.js:12:36)
        at Timeout._onTimeout (/home/iojs/build/workspace/node-test-commit-linux/nodes/alpine35-container-x64/test/common/index.js:475:15)
        at ontimeout (timers.js:441:11)
        at tryOnTimeout (timers.js:303:5)
        at listOnTimeout (timers.js:266:5)
        at Timer.processTimers (timers.js:226:10)
  ...