Some tests about .eslintignore file are failing on Windows

[mysticatea]

Tell us about your environment

• ESLint Version: master
• Node Version: 10.4.0
• npm Version: 6.1.0

What parser (default, Babel-ESLint, etc.) are you using?
Please show your full configuration:

N/A

What did you do? Please include the actual source code causing the issue, as well as the command that you used to run ESLint.

npm test on our repo.

What did you expect to happen?

Tests are passed.

What actually happened? Please include the actual, raw output from ESLint.

> npm i; npm t
npm WARN eslint-plugin-es@1.3.1 requires a peer of eslint@>=4.19.1 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-plugin-eslint-plugin@1.4.0 requires a peer of eslint@>=4.1.0 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-plugin-node@7.0.1 requires a peer of eslint@>=4.19.1 but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

updated 1 package and audited 6116 packages in 12.179s
found 12 vulnerabilities (4 low, 6 moderate, 2 critical)
  run `npm audit fix` to fix them, or `npm audit` for details

> eslint@5.2.0 test C:\Users\starc\Documents\GitHub\eslint
> node Makefile.js test

Validating Makefile.js
Validating .eslintrc.js
Validating JSON Files
Validating Markdown Files
Validating JavaScript files
Validating JavaScript test files
Validating rules
Running unit tests

  [▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬...](node:10708) [ESLINT_LEGACY_ECMAFEATURES] DeprecationWarning: The 'ecmaFeatures' config file property is deprecated, and has no effect. (found in "tests\fixtures\config-file\ecma-features\.eslintrc.yml")
(node:10708) [ESLINT_LEGACY_OBJECT_REST_SPREAD] DeprecationWarning: The 'parserOptions.ecmaFeatures.experimentalObjectRestSpread' option is deprecated. Use 'parserOptions.ecmaVersion' instead. (found in "tests\fixtures\config-file\experimental-object-rest-spread\basic\.eslintrc.yml")
(node:10708) [ESLINT_LEGACY_OBJECT_REST_SPREAD] DeprecationWarning: The 'parserOptions.ecmaFeatures.experimentalObjectRestSpread' option is deprecated. Use 'parserOptions.ecmaVersion' instead. (found in "tests\fixtures\config-file\experimental-object-rest-spread\subdir\.eslintrc.yml")
(node:10708) [ESLINT_LEGACY_OBJECT_REST_SPREAD] DeprecationWarning: The 'parserOptions.ecmaFeatures.experimentalObjectRestSpread' option is deprecated. Use 'parserOptions.ecmaVersion' instead. (found in "tests\fixtures\config-file\experimental-object-rest-spread\extends\common.yml")
  [▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬.]


  [▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬](node:10708) [DEP0094] DeprecationWarning: assert.fail() with more than one argument is deprecated. Please use assert.strictEqual() instead or only pass a message.
  [▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬]

  18351 passing (1m)
  4 failing

  1) CLIEngine
       executeOnFiles()
         should ignore one-level down node_modules when ignore file has 'node_modules/' in it:

      AssertionError: expected 2 to equal 1
      + expected - actual

      -2
      +1

      at Context.it (tests\lib\cli-engine.js:1107:20)

  2) CLIEngine
       executeOnFiles()
         should ignore all files and throw an error when tests/fixtures/ is in ignore file:
     AssertionError: expected [Function] to throw an error
      at Context.it (tests\lib\cli-engine.js:1124:20)

  3) IgnoredPaths
       initialization
         should load .eslintignore from cwd when explicitly passed:
     AssertionError: expected [ Array(5) ] to include 'sampleignorepattern'
      at Context.it (tests\lib\ignored-paths.js:128:20)

  4) IgnoredPaths
       initialization with ignorePath containing commented lines
         should not include comments in ignore rules:
     AssertionError: expected [ Array(5) ] to include 'this_one_not'
      at Context.it (tests\lib\ignored-paths.js:453:20)



=============================================================================
Writing coverage object [C:\Users\starc\Documents\GitHub\eslint\coverage\coverage.json]
Writing coverage reports at [C:\Users\starc\Documents\GitHub\eslint\coverage]
=============================================================================

=============================== Coverage summary ===============================
Statements   : 99.29% ( 14358/14460 ), 165 ignored
Branches     : 98.26% ( 11051/11247 ), 122 ignored
Functions    : 99.71% ( 2427/2434 ), 28 ignored
Lines        : 99.29% ( 14213/14314 )
================================================================================
C:\Users\starc\Documents\GitHub\eslint\node_modules\shelljs\src\common.js:401
      if (config.fatal) throw e;
                        ^

Error: exec: (node:10708) [ESLINT_LEGACY_ECMAFEATURES] DeprecationWarning: The 'ecmaFeatures' config file property is deprecated, and has
no effect. (found in "tests/fixtures/config-file/ecma-features/.eslintrc.yml")
(node:10708) [ESLINT_LEGACY_OBJECT_REST_SPREAD] DeprecationWarning: The 'parserOptions.ecmaFeatures.experimentalObjectRestSpread' option is deprecated. Use 'parserOptions.ecmaVersion' instead. (found in "tests/fixtures/config-file/experimental-object-rest-spread/basic/.eslintrc.yml")
(node:10708) [ESLINT_LEGACY_OBJECT_REST_SPREAD] DeprecationWarning: The 'parserOptions.ecmaFeatures.experimentalObjectRestSpread' option is deprecated. Use 'parserOptions.ecmaVersion' instead. (found in "tests/fixtures/config-file/experimental-object-rest-spread/subdir/.eslintrc.yml")
(node:10708) [ESLINT_LEGACY_OBJECT_REST_SPREAD] DeprecationWarning: The 'parserOptions.ecmaFeatures.experimentalObjectRestSpread' option is deprecated. Use 'parserOptions.ecmaVersion' instead. (found in "tests/fixtures/config-file/experimental-object-rest-spread/extends/common.yml")



(node:10708) [DEP0094] DeprecationWarning: assert.fail() with more than one argument is deprecated. Please use assert.strictEqual() instead or only pass a message.
=============================================================================
Writing coverage object [C:/Users/starc/Documents/GitHub/eslint/coverage/coverage.json]
Writing coverage reports at [C:/Users/starc/Documents/GitHub/eslint/coverage]
=============================================================================

    at Object.error (C:\Users\starc\Documents\GitHub\eslint\node_modules\shelljs\src\common.js:110:27)
    at execSync (C:\Users\starc\Documents\GitHub\eslint\node_modules\shelljs\src\exec.js:99:12)
    at _exec (C:\Users\starc\Documents\GitHub\eslint\node_modules\shelljs\src\exec.js:202:12)
    at C:\Users\starc\Documents\GitHub\eslint\node_modules\shelljs\src\common.js:335:23
    at Function.target.test (C:\Users\starc\Documents\GitHub\eslint\Makefile.js:602:18)
    at Object.global.target.(anonymous function) [as test] (C:\Users\starc\Documents\GitHub\eslint\node_modules\shelljs\make.js:36:40)
    at C:\Users\starc\Documents\GitHub\eslint\node_modules\shelljs\make.js:48:27
    at Array.forEach (<anonymous>)
    at Timeout._onTimeout (C:\Users\starc\Documents\GitHub\eslint\node_modules\shelljs\make.js:46:10)
    at ontimeout (timers.js:427:11)
npm ERR! Test failed.  See above for more details.