         [coreSpecFailed, failedPackages] = results
 
       elapsedTime = Math.round((Date.now() - startTime) / 100) / 10
-      grunt.log.ok("Total spec time: #{elapsedTime}s using #{concurrency} cores")
+      grunt.log.ok("Total spec time: #{elapsedTime}s")
       failures = failedPackages
       failures.push "atom core" if coreSpecFailed
 
       grunt.log.error("[Error]".red + " #{failures.join(', ')} spec(s) failed") if failures.length > 0
 
-      if process.platform is 'win32' and process.env.JANKY_SHA1
-        done()
-      else
-        done(not coreSpecFailed and failedPackages.length is 0)
+      done(not coreSpecFailed and failedPackages.length is 0)

      continue unless isAtomPackage(packagePath)
      packageSpecQueue.push(packagePath)

    packageSpecQueue.concurrency = Math.max(1, concurrency - 1)
    packageSpecQueue.drain = -> callback(null, failedPackages)

  runCoreSpecs = (callback, logOutput = false) ->
    appPath = getAppPath()
    resourcePath = process.cwd()
    coreSpecsPath = path.resolve('spec')

    if process.platform in ['darwin', 'linux']
      options =
        cmd: appPath
        args: ['--test', "--resource-path=#{resourcePath}", coreSpecsPath, "--user-data-dir=#{temp.mkdirSync('atom-user-data-dir')}"]
        opts:
          env: _.extend({}, process.env,
            ATOM_INTEGRATION_TESTS_ENABLED: true
          )

    else if process.platform is 'win32'
      options =
        cmd: process.env.comspec
        args: ['/c', appPath, '--test', "--resource-path=#{resourcePath}", '--log-file=ci.log', coreSpecsPath]
        opts:
          env: _.extend({}, process.env,
            ATOM_INTEGRATION_TESTS_ENABLED: true
          )

    if logOutput
      options.opts.stdio = 'inherit'

    grunt.log.ok "Launching core specs."
    spawn options, (error, results, code) ->
      if process.platform is 'win32'
        process.stderr.write(fs.readFileSync('ci.log')) if error
        fs.unlinkSync('ci.log')
      else
        # TODO: Restore concurrency on Windows
        packageSpecQueue?.concurrency = concurrency
        logDeprecations('Core Specs', results)

      callback(null, error)

  grunt.registerTask 'run-specs', 'Run the specs', ->
    done = @async()
    startTime = Date.now()
    method =
      if concurrency is 1
        async.series
      else
        async.parallel

    # If we're just running the core specs then we won't have any output to
    # indicate the tests actually *are* running. This upsets Travis:
    # https://github.com/atom/atom/issues/10837. So pass the test output
    # through.
    runCoreSpecsWithLogging = (callback) -> runCoreSpecs(callback, true)

    specs =
      if process.env.ATOM_SPECS_TASK is 'packages'
        [runPackageSpecs]
      else if process.env.ATOM_SPECS_TASK is 'core'
        [runCoreSpecsWithLogging]
      else
        [runCoreSpecs, runPackageSpecs]

    method specs, (error, results) ->
      failedPackages = []
      coreSpecFailed = null


    resourcePath = process.cwd()
    appPath = getAppPath()

    packageSpecQueue = async.queue (packagePath, callback) ->
      options =
        cmd: appPath
        args: ['--test', "--resource-path=#{resourcePath}", path.join(packagePath, 'spec')]
        opts:
          cwd: packagePath
          env: _.extend({}, process.env, ELECTRON_ENABLE_LOGGING: true, ATOM_PATH: rootDir)

      grunt.log.ok "Launching #{path.basename(packagePath)} specs."
      spawn options, (error) ->
        failedPackages.push path.basename(packagePath) if error
        callback()

    modulesDirectory = path.resolve('node_modules')
