Tests are failing intermittently when run locally

[juwara0]

When running locally running npm run tests some of the tests are failing intermittently:

First run:

->  npm run test

> ember-cli-frost-blueprints@5.0.1 test /Users/Micarrol/Devel/ember-cli-frost-blueprints
> npm run lint && npm run node-test

> ember-cli-frost-blueprints@5.0.1 lint /Users/Micarrol/Devel/ember-cli-frost-blueprints
> lint-all-the-things

Running linting…

 Dockerfile: 0 errors, 0 warnings 

 HTMLBars: 0 errors, 0 warnings 

 Javascript: 0 errors, 0 warnings 

 Markdown: 0 errors, 0 warnings 

 SASS: 0 errors, 0 warnings 

linting complete!

> ember-cli-frost-blueprints@5.0.1 node-test /Users/Micarrol/Devel/ember-cli-frost-blueprints
> istanbul cover _mocha -- --recursive tests/

  acceptance-test
    ember g acceptance-test foo-bar
      1) "before each" hook for "should not error"

  adapter-test
    ember g adapter-test foo-bar
      ✓ should not error
      the generated file(s)
         ✓ tests/unit/adapters/foo-bar-test.js
        ✓ should pass lint

  component
    ember g component foo-bar
      ✓ should not error
      the generated file(s)
         ✓ addon/templates/components/foo-bar.hbs
         ✓ app/components/foo-bar.js
         ✓ addon/components/foo-bar.js
         ✓ tests/integration/components/foo-bar-test.js
        ✓ should pass lint
    ember g component foo-bar --pod
      ✓ should not error
      the generated file(s)
         ✓ addon/pods/components/foo-bar/template.hbs
         ✓ app/pods/components/foo-bar/component.js
         ✓ addon/pods/components/foo-bar/component.js
         ✓ tests/integration/pods/components/foo-bar/component-test.js
        ✓ should pass lint
    ember g component foo-bar --pro
      ✓ should not error
      the generated file(s)
         ✓ addon/templates/components/foo-bar.hbs
         ✓ addon/components/foo-bar.js
         ✓ app/components/foo-bar.js
         ✓ tests/integration/components/foo-bar-test.js
        ✓ should pass lint
    ember g component foo-bar --route baz
      ✓ should not error
      the generated file(s)
         ✓ addon/pods/baz/-components/foo-bar/template.hbs
         ✓ app/components/foo-bar.js
         ✓ addon/pods/baz/-components/foo-bar/component.js
         ✓ tests/integration/pods/baz/-components/foo-bar/component-test.js
        ✓ should pass lint
    ember g component foo-bar --route baz --pro
      ✓ should not error
      the generated file(s)
         ✓ addon/pods/baz/-components/foo-bar/template.hbs
         ✓ app/components/foo-bar.js
         ✓ addon/pods/baz/-components/foo-bar/component.js
         ✓ tests/integration/pods/baz/-components/foo-bar/component-test.js
        ✓ should pass lint

  component-test
    ember g component-test foo-bar
      ✓ should not error
      the generated file(s)
         ✓ tests/integration/components/foo-bar-test.js
        ✓ should pass lint
    ember g component-test foo-bar --unit
      ✓ should not error
      the generated file(s)
         ✓ tests/unit/components/foo-bar-test.js
        ✓ should pass lint
    ember g component-test foo-bar --pod
      ✓ should not error
      the generated file(s)
         ✓ tests/integration/pods/components/foo-bar/component-test.js
        ✓ should pass lint
    ember g component-test foo-bar --route baz
      ✓ should not error
      the generated file(s)
         ✓ tests/integration/pods/baz/-components/foo-bar/component-test.js
        ✓ should pass lint
    ember g component-test foo-bar --pod --route baz
      ✓ should not error
      the generated file(s)
         ✓ tests/integration/pods/baz/-components/foo-bar/component-test.js
        ✓ should pass lint
    ember g component-test foo-bar --unit --pod
      ✓ should not error
      the generated file(s)
         ✓ tests/unit/pods/components/foo-bar/component-test.js
        ✓ should pass lint
    ember g component-test foo-bar --unit --route baz
      ✓ should not error
      the generated file(s)
         ✓ tests/unit/pods/baz/-components/foo-bar/component-test.js
        ✓ should pass lint

  controller
    ember g controller foo-bar
      ✓ should not error
      the generated file(s)
         ✓ app/controllers/foo-bar.js
         ✓ addon/controllers/foo-bar.js
         ✓ tests/unit/controllers/foo-bar-test.js
        ✓ should pass lint

  controller-test
    ember g controller-test foo-bar
      ✓ should not error
      the generated file(s)
         ✓ tests/unit/controllers/foo-bar-test.js
        ✓ should pass lint

  helper
    ember g helper foo-bar
      ✓ should not error
      the generated file(s)
         ✗ tests/unit/helpers/foo-bar-test.js
         ✓ app/helpers/foo-bar.js
         ✓ addon/helpers/foo-bar.js
        ✓ should pass lint

  mixin
    ember g mixin foo-bar
      ✓ should not error
      the generated file(s)
         ✓ tests/unit/mixins/foo-bar-test.js
         ✓ addon/mixins/foo-bar.js
        ✓ should pass lint

  mixin-test
    ember g mixin-test foo-bar
      ✓ should not error
      the generated file(s)
         ✓ tests/unit/mixins/foo-bar-test.js
        ✓ should pass lint

  model-test
    ember g model-test foo-bar
      ✓ should not error
      the generated file(s)
         ✓ tests/unit/models/foo-bar-test.js
        ✓ should pass lint

  route-test
    ember g route-test foo-bar
      ✓ should not error
      the generated file(s)
         ✓ tests/unit/routes/foo-bar-test.js
        ✓ should pass lint

  service
    ember g service foo-bar
      ✓ should not error
      the generated file(s)
         ✗ tests/unit/services/foo-bar-test.js
         ✓ addon/services/foo-bar.js
         ✓ app/services/foo-bar.js
        ✓ should pass lint

  util
    ember g util foo-bar
      ✓ should not error
      the generated file(s)
         ✗ tests/unit/utils/foo-bar-test.js
         ✓ app/utils/foo-bar.js
         ✓ addon/utils/foo-bar.js
        ✓ should pass lint

  44 passing (4m)
  1 failing

  1) acceptance-test ember g acceptance-test foo-bar "before each" hook for "should not error":
     Error: Timeout of 5000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.

Second run:

->  npm run test

> ember-cli-frost-blueprints@5.0.1 test /Users/Micarrol/Devel/ember-cli-frost-blueprints
> npm run lint && npm run node-test

> ember-cli-frost-blueprints@5.0.1 lint /Users/Micarrol/Devel/ember-cli-frost-blueprints
> lint-all-the-things

Running linting…

 Dockerfile: 0 errors, 0 warnings 

 HTMLBars: 0 errors, 0 warnings 

 Javascript: 0 errors, 0 warnings 

 Markdown: 0 errors, 0 warnings 

 SASS: 0 errors, 0 warnings 

linting complete!

> ember-cli-frost-blueprints@5.0.1 node-test /Users/Micarrol/Devel/ember-cli-frost-blueprints
> istanbul cover _mocha -- --recursive tests/

  acceptance-test
    ember g acceptance-test foo-bar
      ✓ should not error
      1) "after each" hook for "should not error"

  adapter-test
    ember g adapter-test foo-bar
      2) "before each" hook for "should not error"

  component
    ember g component foo-bar
      3) "before each" hook for "should not error"
    ember g component foo-bar --pod
      ✓ should not error
^C

  2 passing (32s)
  3 failing

  1) acceptance-test ember g acceptance-test foo-bar "after each" hook for "should not error":
     Error: Timeout of 5000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.

  2) adapter-test ember g adapter-test foo-bar "before each" hook for "should not error":
     Error: Timeout of 5000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.

  3) component ember g component foo-bar "before each" hook for "should not error":
     Error: Timeout of 5000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.

NOTE: on the second run I stopped the test run after I saw several of the tests failing.