diff --git a/lib/jenkins-events.js b/lib/jenkins-events.js
index a57cff19..e38d86aa 100644
--- a/lib/jenkins-events.js
+++ b/lib/jenkins-events.js
@@ -72,6 +72,8 @@ module.exports = (app, events) => {
     // create unique logger which is easily traceable throughout the entire app
     // by having e.g. "nodejs/nodejs.org/#1337" part of every subsequent log statement
     data.logger = logger.child({ identifier, event }, true)
+    // prevent data.logger from plausibly being serialised to JSON due to circular references
+    Object.defineProperty(data, 'logger', { enumerable: false })
 
     data.logger.info('Emitting Jenkins event')
     debug(data)
diff --git a/lib/node-labels.js b/lib/node-labels.js
deleted file mode 100644
index b017bb27..00000000
--- a/lib/node-labels.js
+++ /dev/null
@@ -1,307 +0,0 @@
-'use strict'
-
-// order of entries in this map *does* matter for the resolved labels
-// earlier entries override later entries
-const subSystemLabelsMap = new Map([
-  /* src subsystems */
-  [/^src\/async-wrap/, ['c++', 'async_wrap']],
-  [/^src\/(?:base64|node_buffer|string_)/, ['c++', 'buffer']],
-  [/^src\/cares/, ['c++', 'cares']],
-  [/^src\/(?:process_wrap|spawn_)/, ['c++', 'child_process']],
-  [/^src\/node_crypto/, ['c++', 'crypto']],
-  [/^src\/(?:debug-|node_debug)/, ['c++', 'debugger']],
-  [/^src\/udp_/, ['c++', 'dgram']],
-  [/^src\/(?:fs_|node_file|node_stat_watcher)/, ['c++', 'fs']],
-  [/^src\/node_http_parser/, ['c++', 'http_parser']],
-  [/^src\/node_i18n/, ['c++', 'intl']],
-  [/^src\/uv\./, ['c++', 'libuv']],
-  [/^src\/(?:connect(?:ion)?|pipe|tcp)_/, ['c++', 'net']],
-  [/^src\/node_os/, ['c++', 'os']],
-  [/^src\/(?:node_main|signal_)/, ['c++', 'process']],
-  [/^src\/timer_/, ['c++', 'timers']],
-  [/^src\/(?:CNNICHashWhitelist|node_root_certs|tls_)/, ['c++', 'tls']],
-  [/^src\/tty_/, ['c++', 'tty']],
-  [/^src\/node_url/, ['c++', 'url-whatwg']],
-  [/^src\/node_util/, ['c++', 'util']],
-  [/^src\/(?:node_v8|v8abbr)/, ['c++', 'V8 Engine']],
-  [/^src\/node_contextify/, ['c++', 'vm']],
-  [/^src\/.*win32.*/, ['c++', 'windows']],
-  [/^src\/node_zlib/, ['c++', 'zlib']],
-  [/^src\/tracing/, ['c++', 'tracing']],
-  [/^src\/node_api/, ['c++', 'n-api']],
-  [/^src\/node_http2/, ['c++', 'http2', 'dont-land-on-v6.x']],
-  [/^src\/node_report/, ['c++', 'report']],
-  [/^src\/node_wasi/, ['c++', 'wasi']],
-  [/^src\/node_worker/, ['c++', 'worker']],
-  [/^src\/quic\/*/, ['c++', 'quic', 'dont-land-on-v14.x', 'dont-land-on-v12.x']],
-  [/^src\/node_bob*/, ['c++', 'quic', 'dont-land-on-v14.x', 'dont-land-on-v12.x']],
-
-  // don't label python files as c++
-  [/^src\/.+\.py$/, 'lib / src'],
-
-  // properly label changes to v8 inspector integration-related files
-  [/^src\/inspector_/, ['c++', 'inspector']],
-
-  // don't want to label it a c++ update when we're "only" bumping the Node.js version
-  [/^src\/(?!node_version\.h)/, 'c++'],
-  // BUILDING.md should be marked as 'build' in addition to 'doc'
-  [/^BUILDING\.md$/, ['build', 'doc']],
-  // meta is a very specific label for things that are policy and or meta-info related
-  [/^([A-Z]+$|CODE_OF_CONDUCT|ROADMAP|WORKING_GROUPS|GOVERNANCE|CHANGELOG|\.mail|\.git.+)/, 'meta'],
-  // things that edit top-level .md files are always a doc change
-  [/^\w+\.md$/, 'doc'],
-  // different variants of *Makefile and build files
-  [/^(tools\/)?(Makefile|BSDmakefile|create_android_makefiles|\.travis\.yml)$/, 'build'],
-  [/^tools\/(install\.py|genv8constants\.py|getnodeversion\.py|js2c\.py|utils\.py|configure\.d\/.*)$/, 'build'],
-  [/^vcbuild\.bat$/, ['build', 'windows']],
-  [/^(android-)?configure|node\.gyp|common\.gypi$/, 'build'],
-  // more specific tools
-  [/^tools\/gyp/, ['tools', 'build']],
-  [/^tools\/doc\//, ['tools', 'doc']],
-  [/^tools\/icu\//, ['tools', 'intl']],
-  [/^tools\/(?:osx-pkg\.pmdoc|pkgsrc)\//, ['tools', 'macos', 'install']],
-  [/^tools\/(?:(?:mac)?osx-)/, ['tools', 'macos']],
-  [/^tools\/test-npm/, ['tools', 'test', 'npm']],
-  [/^tools\/test/, ['tools', 'test']],
-  [/^tools\/(?:certdata|mkssldef|mk-ca-bundle)/, ['tools', 'openssl', 'tls']],
-  [/^tools\/msvs\//, ['tools', 'windows', 'install']],
-  [/^tools\/[^/]+\.bat$/, ['tools', 'windows']],
-  [/^tools\/make-v8/, ['tools', 'V8 Engine']],
-  // all other tool changes should be marked as such
-  [/^tools\//, 'tools'],
-  [/^\.eslint|\.remark|\.editorconfig/, 'tools'],
-
-  /* Dependencies */
-  // libuv needs an explicit mapping, as the ordinary /deps/ mapping below would
-  // end up as libuv changes labeled with "uv" (which is a non-existing label)
-  [/^deps\/uv\//, 'libuv'],
-  [/^deps\/v8\/tools\/gen-postmortem-metadata\.py/, ['V8 Engine', 'post-mortem']],
-  [/^deps\/v8\//, 'V8 Engine'],
-  [/^deps\/uvwasi\//, 'wasi'],
-  [/^deps\/nghttp2\/nghttp2\.gyp/, ['build', 'http2', 'dont-land-on-v6.x']],
-  [/^deps\/nghttp2\//, ['http2', 'dont-land-on-v6.x']],
-  [/^deps\/ngtcp2\//, 'quic', 'dont-land-on-v14.x', 'dont-land-on-v12.x'],
-  [/^deps\/nghttp3\//, 'quic', 'dont-land-on-v14.x', 'dont-land-on-v12.x'],
-  [/^deps\/([^/]+)/, '$1'],
-
-  /* JS subsystems */
-  // Oddities first
-  [/^lib\/(punycode|\w+\/freelist|sys\.js)/, ''], // TODO: ignore better?
-  [/^lib\/constants\.js$/, 'lib / src'],
-  [/^lib\/_(debug_agent|debugger)\.js$/, 'debugger'],
-  [/^lib(\/\w+)?\/(_)?link(ed)?list/, 'timers'],
-  [/^lib\/\w+\/bootstrap_node/, 'lib / src'],
-  [/^lib\/\w+\/v8_prof_/, 'tools'],
-  [/^lib\/\w+\/socket_list/, 'net'],
-  [/^lib\/\w+\/streams$/, 'stream'],
-  [/^lib\/.*http2/, ['http2', 'dont-land-on-v6.x']],
-  [/^lib\/worker_threads.js$/, ['worker']],
-  [/^lib\/internal\/url\.js$/, ['url-whatwg']],
-  [/^lib\/internal\/modules\/esm/, 'ES Modules'],
-  [/^lib\/internal\/quic\/*/, ['quic', 'dont-land-on-v14.x', 'dont-land-on-v12.x']],
-  // All other lib/ files map directly
-  [/^lib\/_(\w+)_\w+\.js?$/, '$1'], // e.g. _(stream)_wrap
-  [/^lib(\/internal)?\/(\w+)\.js?$/, '$2'], // other .js files
-  [/^lib\/internal\/(\w+)(?:\/|$)/, '$1'] // internal subfolders
-])
-
-const jsSubsystemList = [
-  'debugger', 'assert', 'async_hooks', 'buffer', 'child_process', 'cluster',
-  'console', 'crypto', 'dgram', 'dns', 'domain', 'events', 'esm', 'fs', 'http',
-  'https', 'http2', 'module', 'net', 'os', 'path', 'process', 'querystring',
-  'quic', 'readline', 'repl', 'report', 'stream', 'string_decoder', 'timers',
-  'tls', 'tty', 'url', 'util', 'v8', 'vm', 'wasi', 'worker', 'zlib'
-]
-
-const exclusiveLabelsMap = new Map([
-  // more specific tests
-  [/^test\/addons\//, ['test', 'addons']],
-  [/^test\/debugger\//, ['test', 'debugger']],
-  [/^test\/doctool\//, ['test', 'doc', 'tools']],
-  [/^test\/timers\//, ['test', 'timers']],
-  [/^test\/pseudo-tty\//, ['test', 'tty']],
-  [/^test\/inspector\//, ['test', 'inspector']],
-  [/^test\/cctest\/test_inspector/, ['test', 'inspector']],
-  [/^test\/cctest\/test_url/, ['test', 'url-whatwg']],
-  [/^test\/addons-napi\//, ['test', 'n-api']],
-  [/^test\/async-hooks\//, ['test', 'async_hooks']],
-  [/^test\/report\//, ['test', 'report']],
-  [/^test\/fixtures\/es-module/, ['test', 'ES Modules']],
-  [/^test\/es-module\//, ['test', 'ES Modules']],
-
-  [/^test\//, 'test'],
-
-  // specific map for modules.md as it should be labeled 'module' not 'modules'
-  [/^doc\/api\/modules.md$/, ['doc', 'module']],
-  // specific map for esm.md as it should be labeled 'ES Modules' not 'esm'
-  [/^doc\/api\/esm.md$/, ['doc', 'ES Modules']],
-  // n-api is treated separately since it is not a JS core module but is still
-  // considered a subsystem of sorts
-  [/^doc\/api\/n-api.md$/, ['doc', 'n-api']],
-  // quic
-  [/^doc\/api\/quic.md$/, ['doc', 'quic', 'dont-land-on-v14.x', 'dont-land-on-v12.x']],
-  // add worker label to PRs that affect doc/api/worker_threads.md
-  [/^doc\/api\/worker_threads.md$/, ['doc', 'worker']],
-  // automatically tag JS subsystem-specific API doc changes
-  [/^doc\/api\/(\w+)\.md$/, ['doc', '$1']],
-  // add deprecations label to PRs that affect doc/api/deprecations.md
-  [/^doc\/api\/deprecations.md$/, ['doc', 'deprecations']],
-
-  [/^doc\//, 'doc'],
-
-  // more specific benchmarks
-  [/^benchmark\/buffers\//, ['benchmark', 'buffer']],
-  [/^benchmark\/(?:arrays|es)\//, ['benchmark', 'V8 Engine']],
-  [/^benchmark\/_http/, ['benchmark', 'http']],
-  [/^benchmark\/(?:misc|fixtures)\//, 'benchmark'],
-  [/^benchmark\/streams\//, ['benchmark', 'stream']],
-  [/^benchmark\/([^/]+)\//, ['benchmark', '$1']],
-
-  [/^benchmark\//, 'benchmark']
-])
-
-function resolveLabels (filepathsChanged, baseBranch, limitLabels = true) {
-  const exclusiveLabels = matchExclusiveSubSystem(filepathsChanged)
-
-  if (typeof baseBranch !== 'string') {
-    if (typeof baseBranch === 'boolean') {
-      limitLabels = baseBranch
-    }
-    baseBranch = ''
-  }
-
-  const labels = (exclusiveLabels.length > 0)
-    ? exclusiveLabels
-    : matchAllSubSystem(filepathsChanged, limitLabels)
-
-  // Add version labels if PR is made against a version branch
-  const m = /^(v\d+\.(?:\d+|x))(?:-staging|$)/.exec(baseBranch)
-  if (m) {
-    labels.push(m[1])
-  }
-
-  return labels
-}
-
-function hasAllSubsystems (arr) {
-  return arr.every((val) => {
-    return jsSubsystemList.includes(val)
-  })
-}
-
-// This function is needed to help properly identify when a PR should always
-// (just) be labeled as 'doc' when it is all changes in doc/api/ that do not
-// match subsystem names (e.g. _toc.md, all.md)
-function hasAllDocChanges (arr) {
-  return arr.every((val) => {
-    return /^doc\//.test(val)
-  })
-}
-
-function hasAllTestChanges (arr) {
-  return arr.every((val) => {
-    return /^test\//.test(val)
-  })
-}
-
-function matchExclusiveSubSystem (filepathsChanged) {
-  const isExclusive = filepathsChanged.every(matchesAnExclusiveLabel)
-  var labels = matchSubSystemsByRegex(exclusiveLabelsMap, filepathsChanged)
-  var nonMetaLabels = labels.filter((label) => {
-    return !/^dont-/.test(label)
-  })
-
-  // if there are multiple API doc changes, do not apply subsystem tags for now
-  if (isExclusive &&
-    nonMetaLabels.includes('doc') &&
-    nonMetaLabels.length > 2 &&
-    !hasAllTestChanges(filepathsChanged)) {
-    const nonDocLabels = nonMetaLabels.filter((val) => {
-      return val !== 'doc'
-    })
-    if (hasAllSubsystems(nonDocLabels) || hasAllDocChanges(filepathsChanged)) {
-      labels = ['doc']
-    } else {
-      labels = []
-    }
-  }
-  return isExclusive ? labels : []
-}
-
-function matchAllSubSystem (filepathsChanged, limitLabels) {
-  return matchSubSystemsByRegex(
-    subSystemLabelsMap, filepathsChanged, limitLabels)
-}
-
-function matchSubSystemsByRegex (rxLabelsMap, filepathsChanged, limitLabels) {
-  const labelCount = []
-  // by putting matched labels into a map, we avoid duplicate labels
-  const labelsMap = filepathsChanged.reduce((map, filepath) => {
-    const mappedSubSystems = mappedSubSystemsForFile(rxLabelsMap, filepath)
-
-    if (!mappedSubSystems) {
-      // short-circuit
-      return map
-    }
-
-    for (var i = 0; i < mappedSubSystems.length; ++i) {
-      const mappedSubSystem = mappedSubSystems[i]
-      if (limitLabels && hasLibOrSrcChanges(filepathsChanged)) {
-        if (labelCount.length >= 4) {
-          for (const label of labelCount) {
-            // don't delete the c++ label as we always want that if it has matched
-            if (label !== 'c++') delete map[label]
-          }
-          map['lib / src'] = true
-          // short-circuit
-          return map
-        } else {
-          labelCount.push(mappedSubSystem)
-        }
-      }
-
-      map[mappedSubSystem] = true
-    }
-
-    return map
-  }, {})
-
-  return Object.keys(labelsMap)
-}
-
-function hasLibOrSrcChanges (filepathsChanged) {
-  return filepathsChanged.some((filepath) => filepath.startsWith('lib/') || filepath.startsWith('src/'))
-}
-
-function mappedSubSystemsForFile (labelsMap, filepath) {
-  for (const [regex, label] of labelsMap) {
-    const matches = regex.exec(filepath)
-
-    if (matches === null) {
-      continue
-    }
-
-    const ret = []
-    const labels = Array.isArray(label) ? label : [label]
-    labels.forEach((label) => {
-      // label names starting with $ means we want to extract a matching
-      // group from the regex we've just matched against
-      if (label.startsWith('$')) {
-        const wantedMatchGroup = label.substr(1)
-        label = matches[wantedMatchGroup]
-      }
-      if (!label) {
-        return
-      }
-      // use label name as is when label doesn't look like a regex matching group
-      ret.push(label)
-    })
-    return ret
-  }
-}
-
-function matchesAnExclusiveLabel (filepath) {
-  return mappedSubSystemsForFile(exclusiveLabelsMap, filepath) !== undefined
-}
-
-exports.resolveLabels = resolveLabels
diff --git a/lib/node-repo.js b/lib/node-repo.js
index 4855ba51..ae26f65f 100644
--- a/lib/node-repo.js
+++ b/lib/node-repo.js
@@ -2,80 +2,17 @@
 
 /* eslint-disable camelcase */
 
-const LRU = require('lru-cache')
 const Aigle = require('aigle')
 const request = require('request')
 
 const githubClient = require('./github-client')
 const { createPrComment } = require('./github-comment')
-const resolveLabels = require('./node-labels').resolveLabels
 const { Owners } = require('./node-owners')
-const existingLabelsCache = new LRU({ max: 1, maxAge: 1000 * 60 * 60 })
 
 const fiveSeconds = 5 * 1000
 
 const sleep = (ms) => new Promise(resolve => setTimeout(resolve, ms))
 
-async function deferredResolveLabelsThenUpdatePr (options) {
-  const timeoutMillis = (options.timeoutInSec || 0) * 1000
-  await sleep(timeoutMillis)
-  return resolveLabelsThenUpdatePr(options)
-}
-
-async function resolveLabelsThenUpdatePr (options) {
-  const times = options.retries || 5
-  const interval = options.retryInterval || fiveSeconds
-  const retry = fn => Aigle.retry({ times, interval }, fn)
-
-  const filepathsChanged = await retry(() => listFiles({
-    owner: options.owner,
-    repo: options.repo,
-    pull_number: options.prId,
-    logger: options.logger
-  }))
-  options.logger.debug('Fetching PR files for labelling')
-
-  const resolvedLabels = resolveLabels(filepathsChanged, options.baseBranch)
-
-  return fetchExistingThenUpdatePr(options, resolvedLabels)
-}
-
-async function fetchExistingThenUpdatePr (options, labels) {
-  try {
-    const existingLabels = await fetchExistingLabels(options)
-    const labelsToAdd = stringsInCommon(existingLabels, labels)
-    options.logger.debug('Resolved labels: ' + labelsToAdd, labels, existingLabels)
-
-    return updatePrWithLabels(options, labelsToAdd)
-  } catch (err) {
-    options.logger.error(err, 'Error retrieving existing repo labels')
-
-    return updatePrWithLabels(options, labels)
-  }
-}
-
-async function updatePrWithLabels (options, labels) {
-  // no need to request github if we didn't resolve any labels
-  if (!labels.length) {
-    return
-  }
-
-  options.logger.debug('Trying to add labels: ' + labels)
-
-  try {
-    await githubClient.issues.addLabels({
-      owner: options.owner,
-      repo: options.repo,
-      issue_number: options.prId,
-      labels: labels
-    })
-
-    options.logger.info('Added labels: ' + labels)
-  } catch (err) {
-    options.logger.error(err, 'Error while adding labels')
-  }
-}
-
 async function removeLabelFromPR (options, label) {
   // no need to request github if we didn't resolve a label
   if (!label) {
@@ -104,46 +41,6 @@ async function removeLabelFromPR (options, label) {
   return label
 }
 
-async function fetchExistingLabels (options) {
-  const cacheKey = `${options.owner}:${options.repo}`
-
-  if (existingLabelsCache.has(cacheKey)) {
-    return existingLabelsCache.get(cacheKey)
-  }
-
-  const labelsResult = await fetchLabelPages(options, 1)
-  const existingLabels = labelsResult.data || labelsResult || []
-  const existingLabelNames = existingLabels.map((label) => label.name)
-
-  // cache labels so we don't have to fetch these *all the time*
-  existingLabelsCache.set(cacheKey, existingLabelNames)
-  options.logger.debug('Filled existing repo labels cache: ' + existingLabelNames)
-
-  return existingLabelNames
-}
-
-async function fetchLabelPages (options, startPageNum, cb) {
-  // the github client API is somewhat misleading,
-  // this fetches *all* repo labels not just for an issue
-  const result = await githubClient.issues.listLabelsForRepo({
-    owner: options.owner,
-    repo: options.repo,
-    page: startPageNum,
-    per_page: 100
-  })
-
-  const existingLabels = result.data || []
-  if (!githubClient.hasNextPage(result)) {
-    return existingLabels
-  }
-
-  const remainingLabels = await fetchLabelPages(
-    options,
-    startPageNum + 1)
-
-  return existingLabels.concat(remainingLabels)
-}
-
 function getBotPrLabels (options, cb) {
   githubClient.issues.listEvents({
     owner: options.owner,
@@ -175,13 +72,6 @@ function getBotPrLabels (options, cb) {
   }, cb)
 }
 
-function stringsInCommon (arr1, arr2) {
-  const loweredArr2 = arr2.map((str) => str.toLowerCase())
-  // we want the original string cases in arr1, therefore we don't lowercase them
-  // before comparing them cause that would wrongly make "V8" -> "v8"
-  return arr1.filter((str) => loweredArr2.indexOf(str.toLowerCase()) !== -1)
-}
-
 async function deferredResolveOwnersThenPingPr (options) {
   const timeoutMillis = (options.timeoutInSec || 0) * 1000
   await sleep(timeoutMillis)
@@ -288,12 +178,9 @@ async function pingOwners (options, owners) {
 
 exports.getBotPrLabels = getBotPrLabels
 exports.removeLabelFromPR = removeLabelFromPR
-exports.fetchExistingThenUpdatePr = fetchExistingThenUpdatePr
-exports.resolveLabelsThenUpdatePr = deferredResolveLabelsThenUpdatePr
 exports.resolveOwnersThenPingPr = deferredResolveOwnersThenPingPr
 
 // exposed for testability
-exports._fetchExistingLabels = fetchExistingLabels
 exports._testExports = {
   pingOwners, getCodeOwnersFile, getCodeOwnersUrl, getDefaultBranch, listFiles, getCommentForOwners
 }
diff --git a/package-lock.json b/package-lock.json
index c4dcc8dd..4aa78ad5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2417,9 +2417,9 @@
       }
     },
     "glob-parent": {
-      "version": "5.1.0",
-      "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.0.tgz",
-      "integrity": "sha512-qjtRgnIVmOfnKUE3NJAQEdk+lKrxfw8t5ke7SXtfMTHcjsBfOfWXCQfdb30zfDoZQ2IRSIiidmjtbHZPZ++Ihw==",
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
+      "integrity": "sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==",
       "dev": true,
       "requires": {
         "is-glob": "^4.0.1"
@@ -2514,9 +2514,9 @@
       }
     },
     "hosted-git-info": {
-      "version": "2.7.1",
-      "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.7.1.tgz",
-      "integrity": "sha512-7T/BxH19zbcCTa8XkMlbK5lTo1WtgkFi3GvdWEyNuc4Vex7/9Dqbnpsf4JMydcfj9HCg4zUWFTL3Za6lapg5/w==",
+      "version": "2.8.9",
+      "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.8.9.tgz",
+      "integrity": "sha512-mxIDAb9Lsm6DoOJ7xH+5+X4y1LU/4Hi50L9C5sIswK3JzULS4bwk1FvjdBgvYR4bzT4tuUQiC15FE2f5HbLvYw==",
       "dev": true
     },
     "html-escaper": {
@@ -3156,9 +3156,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.19",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.19.tgz",
-      "integrity": "sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ=="
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
     },
     "lodash.flattendeep": {
       "version": "4.4.0",
@@ -3187,12 +3187,6 @@
       "integrity": "sha512-U7KCmLdqsGHBLeWqYlFA0V0Sl6P08EE1ZrmA9cxjUE0WVqT9qnyVDPz1kzpFEP0jdJuFnasWIfSd7fsaNXkpbg==",
       "dev": true
     },
-    "lolex": {
-      "version": "1.6.0",
-      "resolved": "https://registry.npmjs.org/lolex/-/lolex-1.6.0.tgz",
-      "integrity": "sha1-OpoCg0UqR9dDnnJzG54H1zhuSfY=",
-      "dev": true
-    },
     "loose-envify": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
@@ -3206,6 +3200,7 @@
       "version": "4.1.3",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.3.tgz",
       "integrity": "sha512-fFEhvcgzuIoJVUF8fYr5KR0YqxD238zgObTps31YdADwPPAp82a4M8TrckkWyx7ekNlf9aBcVn81cFwwXngrJA==",
+      "dev": true,
       "requires": {
         "pseudomap": "^1.0.2",
         "yallist": "^2.1.2"
@@ -3528,9 +3523,9 @@
       "dev": true
     },
     "normalize-url": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/normalize-url/-/normalize-url-4.5.0.tgz",
-      "integrity": "sha512-2s47yzUxdexf1OhyRi4Em83iQk0aPvwTddtFz4hnSSw9dCEsLEGf6SwIO8ss/19S9iBb5sJaOuTvTGDeZI00BQ==",
+      "version": "4.5.1",
+      "resolved": "https://registry.npmjs.org/normalize-url/-/normalize-url-4.5.1.tgz",
+      "integrity": "sha512-9UZCFRHQdNrfTpGg8+1INIg93B6zE0aXMVFkw1WFwvO4SlZywU6aLg5Of0Ap/PgcbSw4LNxvMWXMeugwMCX0AA==",
       "dev": true
     },
     "npm-run-path": {
@@ -3744,12 +3739,12 @@
       }
     },
     "original": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/original/-/original-1.0.1.tgz",
-      "integrity": "sha512-IEvtB5vM5ULvwnqMxWBLxkS13JIEXbakizMSo3yoPNPCIWzg8TG3Usn/UhXoZFM/m+FuEA20KdzPSFq/0rS+UA==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/original/-/original-1.0.2.tgz",
+      "integrity": "sha512-hyBVl6iqqUOJ8FqRe+l/gS8H+kKYjrEndd5Pm1MfBtsEKA038HkkdbAl/72EAXGyonD/PFsvmVG+EvcIpliMBg==",
       "dev": true,
       "requires": {
-        "url-parse": "~1.4.0"
+        "url-parse": "^1.4.3"
       }
     },
     "os-homedir": {
@@ -4197,7 +4192,8 @@
     "pseudomap": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
-      "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM="
+      "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM=",
+      "dev": true
     },
     "psl": {
       "version": "1.1.31",
@@ -4239,9 +4235,9 @@
       "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA=="
     },
     "querystringify": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/querystringify/-/querystringify-2.0.0.tgz",
-      "integrity": "sha512-eTPo5t/4bgaMNZxyjWx6N2a6AuE0mq51KWvpc7nU/MAqixcI6v6KrGUKES0HaomdnolQBBXU/++X6/QQ9KL4tw==",
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/querystringify/-/querystringify-2.2.0.tgz",
+      "integrity": "sha512-FIqgj2EUvTa7R50u0rGsyTftzjYmv/a3hO345bZNrqabNqjtgiDMgmo4mkUjd+nzU5oF3dClKqFIPUKybUyqoQ==",
       "dev": true
     },
     "range-parser": {
@@ -6550,12 +6546,12 @@
       }
     },
     "url-parse": {
-      "version": "1.4.4",
-      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.4.4.tgz",
-      "integrity": "sha512-/92DTTorg4JjktLNLe6GPS2/RvAd/RGr6LuktmWSMLEOa6rjnlrFXNgSbSmkNvCoL2T028A0a1JaJLzRMlFoHg==",
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.5.1.tgz",
+      "integrity": "sha512-HOfCOUJt7iSYzEx/UqgtwKRMC6EU91NFhsCHMv9oM03VJcVo2Qrp8T8kI9D7amFf1cu+/3CEhgb3rF9zL7k85Q==",
       "dev": true,
       "requires": {
-        "querystringify": "^2.0.0",
+        "querystringify": "^2.1.1",
         "requires-port": "^1.0.0"
       }
     },
@@ -6786,15 +6782,16 @@
       "dev": true
     },
     "y18n": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
-      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.1.tgz",
+      "integrity": "sha512-wNcy4NvjMYL8gogWWYAO7ZFWFfHcbdbE57tZO8e4cbpj8tfUcwrwqSl3ad8HxpYWCdXcJUCeKKZS62Av1affwQ==",
       "dev": true
     },
     "yallist": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
+      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
+      "dev": true
     },
     "yaml": {
       "version": "1.8.3",
diff --git a/package.json b/package.json
index 5e9ebcb9..9e3158fa 100644
--- a/package.json
+++ b/package.json
@@ -26,12 +26,10 @@
     "events-async": "^1.2.1",
     "express": "^4.13.4",
     "glob": "^7.0.3",
-    "lru-cache": "^4.0.1",
     "request": "^2.88.0"
   },
   "devDependencies": {
     "eventsource": "^0.2.1",
-    "lolex": "^1.5.1",
     "nock": "^12.0.3",
     "nodemon": "^2.0.4",
     "proxyquire": "^1.7.10",
diff --git a/scripts/attempt-backport.js b/scripts/attempt-backport.js
deleted file mode 100644
index 3a95d9b7..00000000
--- a/scripts/attempt-backport.js
+++ /dev/null
@@ -1,241 +0,0 @@
-'use strict'
-
-const { spawn } = require('child_process')
-const debug = require('debug')('attempt-backport')
-const request = require('request')
-const { fetchExistingThenUpdatePr, removeLabelFromPR, getBotPrLabels } = require('../lib/node-repo')
-
-const enabledRepos = ['node']
-const nodeVersions = [
-  { version: 7 },
-  { version: 6, lts: true },
-  { version: 4, lts: true }
-]
-const queue = []
-let inProgress = false
-
-module.exports = function (app) {
-  if (!global._node_repo_dir) return
-
-  app.on('pull_request.opened', handlePrUpdate)
-  // Pull Request updates
-  app.on('pull_request.synchronize', handlePrUpdate)
-
-  // to trigger polling manually
-  app.get('/attempt-backport/pr/:owner/:repo/:id', (req, res) => {
-    const owner = req.params.owner
-    const repo = req.params.repo
-    const prId = parseInt(req.params.id, 10)
-    const options = { owner, repo, prId, logger: req.log }
-
-    if (~enabledRepos.indexOf(repo)) {
-      for (const node of nodeVersions) {
-        queueAttemptBackport(options, node.version, !!node.lts)
-      }
-    }
-
-    if (!inProgress) processNextBackport()
-
-    res.end()
-  })
-}
-
-function handlePrUpdate (event, owner, repo) {
-  if (!~enabledRepos.indexOf(repo)) return
-
-  if (event.pull_request.base.ref !== 'master') return
-
-  const prId = event.number
-  const options = { owner, repo, prId, logger: event.logger }
-
-  debug(`/${owner}/${repo}/pull/${prId} sync`)
-  for (const node of nodeVersions) {
-    queueAttemptBackport(options, node.version, !!node.lts)
-  }
-
-  if (!inProgress) processNextBackport()
-}
-
-function processNextBackport () {
-  const item = queue.shift()
-  if (!item) return
-
-  if (typeof item !== 'function') {
-    debug(`item was not a function! - queue size: ${queue.length}`)
-    return
-  } else if (inProgress) {
-    debug(`was still in progress! - queue size: ${queue.length}`)
-    return
-  }
-  item()
-}
-
-function queueAttemptBackport (options, version, isLTS) {
-  queue.push(function () {
-    options.logger.debug(`processing a new backport to v${version}`)
-    attemptBackport(options, version, isLTS, processNextBackport)
-  })
-}
-
-function attemptBackport (options, version, isLTS, cb) {
-  // Start
-  gitAmAbort()
-
-  function wrapCP (cmd, args, opts, callback) {
-    let exited = false
-
-    if (arguments.length === 3) {
-      callback = opts
-      opts = {}
-    }
-
-    opts.cwd = global._node_repo_dir
-
-    const cp = spawn(cmd, args, opts)
-    const argsString = [cmd, ...args].join(' ')
-
-    cp.on('error', function (err) {
-      debug(`child_process err: ${err}`)
-      if (!exited) onError()
-    })
-    cp.on('exit', function (code) {
-      exited = true
-      if (!cb) {
-        debug(`error before exit, code: ${code}, on '${argsString}'`)
-        return
-      } else if (code > 0) {
-        debug(`exit code > 0: ${code}, on '${argsString}'`)
-        onError()
-        return
-      }
-      callback()
-    })
-    // Useful when debugging.
-
-    cp.stdout.on('data', (data) => {
-      options.logger.debug(data.toString())
-    })
-    cp.stderr.on('data', (data) => {
-      options.logger.debug(data.toString())
-    })
-
-    return cp
-  }
-
-  function onError () {
-    if (!cb) return
-    const _cb = cb
-    setImmediate(() => {
-      options.logger.debug(`backport to ${version} failed`)
-
-      if (!isLTS) {
-        options.logger.debug(`Should have added (but temporary disabled): dont-land-on-v${version}.x`)
-      } else {
-        getBotPrLabels(options, (err, ourLabels) => {
-          if (err) {
-            options.logger.error(err, 'Error fetching existing bot labels')
-            return
-          }
-
-          const label = `lts-watch-v${version}.x`
-          if (!ourLabels.includes(label)) return
-
-          removeLabelFromPR(options, label)
-        })
-      }
-
-      setImmediate(() => {
-        inProgress = false
-        _cb()
-      })
-    })
-    cb = null
-  }
-
-  function gitAmAbort () {
-    // TODO(Fishrock123): this should probably just merge into wrapCP
-    let exited = false
-    options.logger.debug('aborting any previous backport attempt...')
-
-    const cp = spawn('git', ['am', '--abort'], { cwd: global._node_repo_dir })
-    const argsString = 'git am --abort'
-
-    cp.on('error', function (err) {
-      debug(`child_process err: ${err}`)
-      if (!exited) onError()
-    })
-    cp.on('exit', function (code) {
-      exited = true
-      if (!cb) {
-        debug(`error before exit, code: ${code}, on '${argsString}'`)
-        return
-      }
-      gitRemoteUpdate()
-    })
-  }
-
-  function gitRemoteUpdate () {
-    options.logger.debug('updating git remotes...')
-    wrapCP('git', ['remote', 'update', '-p'], gitCheckout)
-  }
-
-  function gitCheckout () {
-    options.logger.debug(`checking out origin/v${version}.x-staging...`)
-    wrapCP('git', ['checkout', `origin/v${version}.x-staging`], gitCleanFXD)
-  }
-
-  function gitCleanFXD () {
-    wrapCP('git', ['clean', '-fdx'], fetchDiff)
-  }
-
-  function fetchDiff () {
-    options.logger.debug(`fetching diff from pr ${options.prId}...`)
-
-    const url = `https://patch-diff.githubusercontent.com/raw/${options.owner}/${options.repo}/pull/${options.prId}.patch`
-
-    const req = request(url)
-
-    req.on('error', function (err) {
-      debug(`request err: ${err}`)
-      return onError()
-    })
-    req.on('response', function (response) {
-      if (response.statusCode !== 200) {
-        debug(`request non-200 status: ${response.statusCode}`)
-        return onError()
-      }
-    })
-
-    gitAttemptBackport(req)
-  }
-
-  function gitAttemptBackport (req) {
-    options.logger.debug(`attempting a backport to v${version}...`)
-    const cp = wrapCP('git', ['am', '-3'], { stdio: 'pipe' }, function done () {
-      // Success!
-      if (isLTS) {
-        fetchExistingThenUpdatePr(options, [`lts-watch-v${version}.x`])
-      } else {
-        getBotPrLabels(options, (err, ourLabels) => {
-          if (err) {
-            options.logger.error(err, 'Error fetching existing bot labels')
-            return
-          }
-
-          const label = `dont-land-on-v${version}.x`
-          if (!ourLabels.includes(label)) return
-
-          removeLabelFromPR(options, label)
-        })
-      }
-
-      setImmediate(() => {
-        options.logger.debug(`backport to v${version} successful`)
-        inProgress = false
-        cb()
-      })
-    })
-
-    req.pipe(cp.stdin)
-  }
-}
diff --git a/scripts/node-subsystem-label.js b/scripts/node-subsystem-label.js
deleted file mode 100644
index ce3bd0b9..00000000
--- a/scripts/node-subsystem-label.js
+++ /dev/null
@@ -1,33 +0,0 @@
-'use strict'
-
-const debug = require('debug')('node_subsystem_label')
-
-const nodeRepo = require('../lib/node-repo')
-
-const timeoutInSec = process.env.WAIT_SECONDS_BEFORE_RESOLVING_LABELS || 2
-
-module.exports = function (app, events) {
-  events.on('pull_request.opened', handlePrCreated)
-}
-
-function handlePrCreated (event, owner, repo) {
-  const prId = event.number
-  const logger = event.logger
-  const baseBranch = event.pull_request.base.ref
-
-  // subsystem labelling is for node core only
-  if (repo !== 'node') return
-
-  debug(`/${owner}/${repo}/pull/${prId} opened`)
-  // by not hard coding the owner repo to nodejs/node here,
-  // we can test these this script in a different repo than
-  // *actual* node core as long as the repo is named "node"
-  return nodeRepo.resolveLabelsThenUpdatePr({
-    owner,
-    repo,
-    prId,
-    logger,
-    baseBranch,
-    timeoutInSec
-  })
-}
diff --git a/server.js b/server.js
index 41b63ea1..ffb1bec8 100644
--- a/server.js
+++ b/server.js
@@ -4,20 +4,6 @@ require('dotenv').load({ silent: true })
 
 const glob = require('glob')
 const logger = require('./lib/logger')
-const { spawnSync } = require('child_process')
-
-if (process.env.NODE_REPO_DIR) {
-  const fs = require('fs')
-  global._node_repo_dir = fs.realpathSync(process.env.NODE_REPO_DIR)
-  const out = spawnSync('git', ['status'], { cwd: global._node_repo_dir })
-
-  if (out.status !== 0) {
-    logger.info(out.stdout)
-    logger.error(out.stderr)
-    logger.error('Bad NODE_REPO_DIR. Backport patch testing disabled.')
-    global._node_repo_dir = false
-  }
-}
 
 const port = process.env.PORT || 3000
 const scriptsToLoad = process.env.SCRIPTS || './scripts/**/*.js'
diff --git a/test/_fixtures/repo-labels-page-2.json b/test/_fixtures/repo-labels-page-2.json
deleted file mode 100644
index ad0ccb5c..00000000
--- a/test/_fixtures/repo-labels-page-2.json
+++ /dev/null
@@ -1,77 +0,0 @@
-{
-  "data": [
-    {
-      "id": 280213872,
-      "url": "https://api.github.com/repos/nodejs/node/labels/v0.12",
-      "name": "v0.12",
-      "color": "c7def8",
-      "default": false
-    },
-    {
-      "id": 280213880,
-      "url": "https://api.github.com/repos/nodejs/node/labels/v4.x",
-      "name": "v4.x",
-      "color": "eb6420",
-      "default": false
-    },
-    {
-      "id": 441404503,
-      "url": "https://api.github.com/repos/nodejs/node/labels/v7.x",
-      "name": "v7.x",
-      "color": "fbca04",
-      "default": false
-    },
-    {
-      "id": 176191361,
-      "url": "https://api.github.com/repos/nodejs/node/labels/V8 Engine",
-      "name": "V8 Engine",
-      "color": "0052cc",
-      "default": false
-    },
-    {
-      "id": 386816750,
-      "url": "https://api.github.com/repos/nodejs/node/labels/V8_inspector",
-      "name": "V8_inspector",
-      "color": "ededed",
-      "default": false
-    },
-    {
-      "id": 155436007,
-      "url": "https://api.github.com/repos/nodejs/node/labels/vm",
-      "name": "vm",
-      "color": "bfdadc",
-      "default": false
-    },
-    {
-      "id": 166236401,
-      "url": "https://api.github.com/repos/nodejs/node/labels/windows",
-      "name": "windows",
-      "color": "9944dd",
-      "default": false
-    },
-    {
-      "id": 151728680,
-      "url": "https://api.github.com/repos/nodejs/node/labels/wontfix",
-      "name": "wontfix",
-      "color": "ededed",
-      "default": true
-    },
-    {
-      "id": 155436008,
-      "url": "https://api.github.com/repos/nodejs/node/labels/zlib",
-      "name": "zlib",
-      "color": "009800",
-      "default": false
-    }
-  ],
-  "meta": {
-    "x-ratelimit-limit":"60",
-    "x-ratelimit-remaining":"52",
-    "x-ratelimit-reset":"1531354196",
-    "x-github-request-id":"EBA1:936F:5CE9930:7925DDD:5B4692FA",
-    "x-github-media-type":"github.v3; format=json",
-    "link":"<https://api.github.com/repositories/27193779/labels?page=1&per_page=100>; rel=\"prev\", <https://api.github.com/repositories/27193779/labels?page=1&per_page=100>; rel=\"first\"",
-    "etag":"\"9408108c2d89606f9539deefc6d90acd\"",
-    "status":"200 OK"
-  }
-}
diff --git a/test/_fixtures/repo-labels.json b/test/_fixtures/repo-labels.json
deleted file mode 100644
index b3d5e759..00000000
--- a/test/_fixtures/repo-labels.json
+++ /dev/null
@@ -1,179 +0,0 @@
-{
-  "data": [
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/confirmed-bug",
-      "name": "confirmed-bug",
-      "color": "fc2929"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/duplicate",
-      "name": "duplicate",
-      "color": "ededed"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/help%20wanted",
-      "name": "help wanted",
-      "color": "159818"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/invalid",
-      "name": "invalid",
-      "color": "ededed"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/question",
-      "name": "question",
-      "color": "cc317c"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/wontfix",
-      "name": "wontfix",
-      "color": "ededed"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/in%20progress",
-      "name": "in progress",
-      "color": "ededed"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/tls",
-      "name": "tls",
-      "color": "fad8c7"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/crypto",
-      "name": "crypto",
-      "color": "009800"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/buffer",
-      "name": "buffer",
-      "color": "f7c6c7"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/http",
-      "name": "http",
-      "color": "c7def8"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/https",
-      "name": "https",
-      "color": "0052cc"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/assert",
-      "name": "assert",
-      "color": "d4c5f9"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/util",
-      "name": "util",
-      "color": "d4c5f9"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/cluster",
-      "name": "cluster",
-      "color": "f7c6c7"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/child_process",
-      "name": "child_process",
-      "color": "f7c6c7"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/dgram",
-      "name": "dgram",
-      "color": "fbca04"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/c++",
-      "name": "c++",
-      "color": "e11d21"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/doc",
-      "name": "doc",
-      "color": "006b75"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/debugger",
-      "name": "debugger",
-      "color": "bfd4f2"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/dns",
-      "name": "dns",
-      "color": "fbca04"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/domain",
-      "name": "domain",
-      "color": "e11d21"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/events",
-      "name": "events",
-      "color": "bfdadc"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/fs",
-      "name": "fs",
-      "color": "0052cc"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/module",
-      "name": "module",
-      "color": "fbca04"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/net",
-      "name": "net",
-      "color": "eb6420"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/os",
-      "name": "os",
-      "color": "d4c5f9"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/querystring",
-      "name": "querystring",
-      "color": "5319e7"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/readline",
-      "name": "readline",
-      "color": "d4c5f9"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/repl",
-      "name": "repl",
-      "color": "5319e7"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/V8 Engine",
-      "name": "V8 Engine",
-      "color": "0052cc"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/timers",
-      "name": "timers",
-      "color": "f7c6c7"
-    },
-    {
-      "url": "https://api.github.com/repos/nodejs/node/labels/v6.x",
-      "name": "v6.x",
-      "color": "c2e0c6"
-    }
-  ],
-  "meta": {
-    "x-ratelimit-limit":"60",
-    "x-ratelimit-remaining":"53",
-    "x-ratelimit-reset":"1531354196",
-    "x-github-request-id":"EB9F:936D:4E2E967:6642386:5B469223",
-    "x-github-media-type":"github.v3; format=json",
-    "link":"<https://api.github.com/repositories/27193779/labels?page=2&per_page=100>; rel=\"next\", <https://api.github.com/repositories/27193779/labels?page=2&per_page=100>; rel=\"last\"",
-    "etag":"\"86cc32d7673902f0b0774ab892d78f14\"",
-    "status":"200 OK"
-  }
-}
diff --git a/test/integration/node-labels-webhook.test.js b/test/integration/node-labels-webhook.test.js
deleted file mode 100644
index 34fac9f1..00000000
--- a/test/integration/node-labels-webhook.test.js
+++ /dev/null
@@ -1,200 +0,0 @@
-'use strict'
-
-const tap = require('tap')
-const url = require('url')
-const nock = require('nock')
-const supertest = require('supertest')
-const proxyquire = require('proxyquire')
-
-const testStubs = {
-  './github-secret': {
-    isValid: () => true,
-
-    // necessary to make makes proxyquire return this stub
-    // whenever *any* module tries to require('./github-secret')
-    '@global': true
-  }
-}
-
-process.env.WAIT_SECONDS_BEFORE_RESOLVING_LABELS = 0
-
-const readFixture = require('../read-fixture')
-
-// Clearing the require cache is needed due to labels being cached into a singleton variable.
-// To ensure every test can run on its own without relying on other tests having run already
-// resulted in the cache being filled up, we enforce all tests to run without any "cache warming",
-// hence labels has to be fetched every time
-function clearRequireCache () {
-  for (const modulePath of Object.keys(require.cache)) {
-    delete require.cache[modulePath]
-  }
-}
-
-function initializeApp () {
-  const { app, events } = proxyquire('../../app', testStubs)
-  clearRequireCache()
-  require('../../scripts/node-subsystem-label')(app, events)
-  return app
-}
-
-setupNoRequestMatchHandler()
-
-tap.test('Sends POST request to https://api.github.com/repos/nodejs/node/issues/<PR-NUMBER>/labels', (t) => {
-  const app = initializeApp()
-  const expectedLabels = ['timers']
-  const webhookPayload = readFixture('pull-request-opened.json')
-
-  const filesScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get('/repos/nodejs/node/pulls/19/files')
-    .reply(200, readFixture('pull-request-files.json'))
-
-  const existingRepoLabelsScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get('/repos/nodejs/node/labels')
-    .reply(200, readFixture('repo-labels.json'))
-
-  const newLabelsScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .post('/repos/nodejs/node/issues/19/labels', { labels: expectedLabels })
-    .reply(200)
-
-  t.plan(1)
-  t.tearDown(() => {
-    filesScope.done()
-    existingRepoLabelsScope.done()
-    newLabelsScope.done()
-  })
-
-  supertest(app)
-    .post('/hooks/github')
-    .set('x-github-event', 'pull_request')
-    .send(webhookPayload)
-    .expect(200)
-    .end((err, res) => {
-      t.equal(err, null)
-    })
-})
-
-tap.test('Adds v6.x label when PR is targeting the v6.x-staging branch', (t) => {
-  const app = initializeApp()
-  const expectedLabels = ['timers', 'v6.x']
-  const webhookPayload = readFixture('pull-request-opened-v6.x.json')
-
-  const filesScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get('/repos/nodejs/node/pulls/19/files')
-    .reply(200, readFixture('pull-request-files.json'))
-
-  const existingRepoLabelsScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get('/repos/nodejs/node/labels')
-    .reply(200, readFixture('repo-labels.json'))
-
-  const newLabelsScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .post('/repos/nodejs/node/issues/19/labels', { labels: expectedLabels })
-    .reply(200)
-
-  t.plan(1)
-  t.tearDown(() => {
-    filesScope.done()
-    existingRepoLabelsScope.done()
-    newLabelsScope.done()
-  })
-
-  supertest(app)
-    .post('/hooks/github')
-    .set('x-github-event', 'pull_request')
-    .send(webhookPayload)
-    .expect(200)
-    .end((err, res) => {
-      t.equal(err, null)
-    })
-})
-
-// reported bug: https://github.com/nodejs/github-bot/issues/58
-tap.test('Does not create labels which does not already exist', (t) => {
-  const app = initializeApp()
-  const webhookPayload = readFixture('pull-request-opened-mapproxy.json')
-
-  const filesScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get('/repos/nodejs/node/pulls/7972/files')
-    .reply(200, readFixture('pull-request-files-mapproxy.json'))
-
-  const existingRepoLabelsScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get('/repos/nodejs/node/labels')
-    .reply(200, readFixture('repo-labels.json'))
-
-  t.plan(1)
-  t.tearDown(() => {
-    filesScope.done()
-    existingRepoLabelsScope.done()
-  })
-
-  supertest(app)
-    .post('/hooks/github')
-    .set('x-github-event', 'pull_request')
-    .send(webhookPayload)
-    .expect(200)
-    .end((err, res) => {
-      t.equal(err, null)
-    })
-})
-
-// reported bug: https://github.com/nodejs/github-bot/issues/92
-tap.test('Adds V8 Engine label when PR has deps/v8 file changes', (t) => {
-  const app = initializeApp()
-  const expectedLabels = ['V8 Engine']
-  const webhookPayload = readFixture('pull-request-opened-v8.json')
-
-  const filesScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get('/repos/nodejs/node/pulls/9422/files')
-    .reply(200, readFixture('pull-request-files-v8.json'))
-
-  const existingRepoLabelsScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get('/repos/nodejs/node/labels')
-    .reply(200, readFixture('repo-labels.json'))
-
-  const newLabelsScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .post('/repos/nodejs/node/issues/9422/labels', { labels: expectedLabels })
-    .reply(200)
-
-  t.plan(1)
-  t.tearDown(() => {
-    filesScope.done()
-    existingRepoLabelsScope.done()
-    newLabelsScope.done()
-  })
-
-  supertest(app)
-    .post('/hooks/github')
-    .set('x-github-event', 'pull_request')
-    .send(webhookPayload)
-    .expect(200)
-    .end((err, res) => {
-      t.equal(err, null)
-    })
-})
-
-function ignoreQueryParams (pathAndQuery) {
-  return url.parse(pathAndQuery, true).pathname
-}
-
-// nock doesn't make the tests explode if an unexpected external request is made,
-// we therefore have to attach an explicit "no match" handler too make tests fail
-// if there's made outgoing request we didn't expect
-function setupNoRequestMatchHandler () {
-  nock.emitter.on('no match', (req) => {
-    // requests against the app is expected and we shouldn't need to tell nock about it
-    if (req.hostname === '127.0.0.1') return
-
-    const reqUrl = `${req._headers.host}${req.path}`
-    throw new Error(`Unexpected request was sent to ${reqUrl}`)
-  })
-}
diff --git a/test/unit/node-build-label.test.js b/test/unit/node-build-label.test.js
deleted file mode 100644
index da0b4746..00000000
--- a/test/unit/node-build-label.test.js
+++ /dev/null
@@ -1,41 +0,0 @@
-'use strict'
-
-const tap = require('tap')
-
-const nodeLabels = require('../../lib/node-labels')
-
-tap.test('label: "build" when build related files has been changed', (t) => {
-  const buildRelatedFiles = [
-    'configure',
-    'node.gyp',
-    'common.gypi',
-    'BSDmakefile',
-    'Makefile',
-    'tools/Makefile',
-    'tools/install.py',
-    'tools/create_android_makefiles',
-    'tools/genv8constants.py',
-    'tools/getnodeversion.py',
-    'tools/js2c.py',
-    'tools/utils.py',
-    'tools/configure.d/nodedownload.py'
-  ]
-
-  buildRelatedFiles.forEach((filepath) => {
-    const labels = nodeLabels.resolveLabels([ filepath ])
-
-    t.same(labels, ['build'], filepath + ' got "build" label')
-  })
-
-  t.end()
-})
-
-tap.test('labels: not "build" when Makefile in ./deps has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'deps/v8/Makefile'
-  ])
-
-  t.notOk(labels.includes('build'))
-
-  t.end()
-})
diff --git a/test/unit/node-js-subsystem-labels.test.js b/test/unit/node-js-subsystem-labels.test.js
deleted file mode 100644
index dc9b51d3..00000000
--- a/test/unit/node-js-subsystem-labels.test.js
+++ /dev/null
@@ -1,175 +0,0 @@
-/* eslint-disable no-multi-spaces */
-'use strict'
-
-const tap = require('tap')
-
-const nodeLabels = require('../../lib/node-labels')
-
-tap.test('label: lib oddities', (t) => {
-  const libFiles = [
-    'lib/_debug_agent.js',
-    'lib/_http_agent.js',
-    'lib/_http_client.js',
-    'lib/_http_common.js',
-    'lib/_http_incoming.js',
-    'lib/_http_outgoing.js',
-    'lib/_http_server.js',
-    'lib/_linklist.js',
-    'lib/_stream_duplex.js',
-    'lib/_stream_passthrough.js',
-    'lib/_stream_readable.js',
-    'lib/_stream_transform.js',
-    'lib/_stream_wrap.js',
-    'lib/_stream_writable.js',
-    'lib/_tls_common.js',
-    'lib/_tls_legacy.js',
-    'lib/_tls_wrap.js',
-    'lib/constants.js',
-    'lib/punycode.js', // ignored
-    'lib/sys.js', // ignored
-    'lib/internal/freelist.js', // ignored
-    'lib/internal/process',
-    'lib/internal/readme.md', // ignored
-    'lib/internal/socket_list.js',
-    'lib/internal/v8_prof_polyfill.js',
-    'lib/internal/v8_prof_processor.js'
-  ]
-
-  const labels = nodeLabels.resolveLabels(libFiles, false)
-
-  t.same(labels, [
-    'debugger',       // _debug_agent
-    'http',           // _http_*
-    'timers',         // linklist
-    'stream',         // _stream_*
-    'tls',            // _tls_*
-    'lib / src',      // constants
-    'process',        // internal/process/
-    'net',            // socket_list
-    'tools'           // v8_prof_*
-  ])
-
-  t.end()
-})
-
-tap.test('label: lib internals oddities duplicates', (t) => {
-  const libFiles = [
-    'lib/internal/bootstrap_node.js',
-    'lib/internal/linkedlist.js',
-    'lib/internal/streams'
-  ]
-
-  const labels = nodeLabels.resolveLabels(libFiles)
-
-  t.same(labels, [
-    'lib / src', // bootstrap_node
-    'timers',    // linkedlist
-    'stream'     // internal/streams/
-  ])
-
-  t.end()
-})
-
-tap.test('label: lib normal without "lib / src" limiting', (t) => {
-  const libFiles = [
-    'lib/_debugger.js',
-    'lib/assert.js',
-    'lib/buffer.js',
-    'lib/child_process.js',
-    'lib/cluster.js',
-    'lib/console.js',
-    'lib/crypto.js',
-    'lib/dgram.js',
-    'lib/dns.js',
-    'lib/domain.js',
-    'lib/events.js',
-    'lib/fs.js',
-    'lib/http.js',
-    'lib/https.js',
-    'lib/module.js',
-    'lib/net.js',
-    'lib/os.js',
-    'lib/path.js',
-    'lib/process.js',
-    'lib/querystring.js',
-    'lib/readline.js',
-    'lib/repl.js',
-    'lib/stream.js',
-    'lib/string_decoder.js',
-    'lib/timers.js',
-    'lib/tls.js',
-    'lib/tty.js',
-    'lib/url.js',
-    'lib/util.js',
-    'lib/v8.js',
-    'lib/vm.js',
-    'lib/zlib.js'
-  ]
-
-  const labels = nodeLabels.resolveLabels(libFiles, false)
-
-  t.same(labels, libFiles.map((path) => /lib\/(_)?(\w+)\.js/.exec(path)[2]))
-
-  t.end()
-})
-
-tap.test('label: lib internals without "lib / src" limiting', (t) => {
-  const libFiles = [
-    'lib/internal/child_process.js',
-    'lib/internal/cluster.js',
-    'lib/internal/module.js',
-    'lib/internal/net.js',
-    'lib/internal/process.js',
-    'lib/internal/readline.js',
-    'lib/internal/repl.js',
-    'lib/internal/util.js'
-  ]
-
-  const labels = nodeLabels.resolveLabels(libFiles, false)
-
-  t.same(labels, libFiles.map((path) => /lib\/internal\/(\w+)\.js/.exec(path)[1]))
-
-  t.end()
-})
-
-tap.test('label: add subsystem when ./doc/api/<subsystem>.md has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'doc/api/fs.md'
-  ], false)
-
-  t.same(labels, ['doc', 'fs'])
-
-  t.end()
-})
-
-tap.test('label: only "doc" with multiple API doc files changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'doc/api/fs.md',
-    'doc/api/stream.md'
-  ], false)
-
-  t.same(labels, ['doc'])
-
-  t.end()
-})
-
-tap.test('label: "doc,module" when doc/api/modules.md was changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'doc/api/modules.md'
-  ], false)
-
-  t.same(labels, ['doc', 'module'])
-
-  t.end()
-})
-
-tap.test('label: appropriate labels for files in internal subdirectories', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'lib/internal/cluster/master.js',
-    'lib/internal/process/next_tick.js'
-  ], false)
-
-  t.same(labels, ['cluster', 'process'])
-
-  t.end()
-})
diff --git a/test/unit/node-labels.test.js b/test/unit/node-labels.test.js
deleted file mode 100644
index 1e3895f3..00000000
--- a/test/unit/node-labels.test.js
+++ /dev/null
@@ -1,716 +0,0 @@
-'use strict'
-
-const tap = require('tap')
-
-const nodeLabels = require('../../lib/node-labels')
-
-tap.test('no labels: when ./test/ and ./doc/ files has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'test/debugger/test-debugger-pid.js',
-    'doc/api/fs.md'
-  ])
-
-  t.same(labels, [])
-
-  t.end()
-})
-
-// This ensures older mislabelling issues doesn't happen again
-// https://github.com/nodejs/node/pull/6432
-// https://github.com/nodejs/node/pull/6448
-tap.test('no labels: when ./test/ and ./lib/ files has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'lib/punycode.js',
-    'test/parallel/test-assert.js'
-  ])
-
-  t.same(labels, [])
-
-  t.end()
-})
-
-tap.test('label: "doc" when only ./doc/ files has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'doc/api/fs.md',
-    'doc/api/http.md',
-    'doc/onboarding.md'
-  ])
-
-  t.same(labels, ['doc'])
-
-  t.end()
-})
-
-tap.test('label: "doc" & "deprecations" when ./doc/api/deprecations.md has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'doc/api/deprecations.md'
-  ])
-
-  t.same(labels, ['doc', 'deprecations'])
-
-  t.end()
-})
-
-tap.test('label: "c++" when ./src/* has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'src/node.cc'
-  ])
-
-  t.same(labels, ['c++'])
-
-  t.end()
-})
-
-const srcCases = [
-  ['async_wrap', ['async-wrap-inl.h', 'async-wrap.h', 'async-wrap.cc']],
-  ['buffer',
-    ['base64.h',
-      'node_buffer.cc',
-      'node_buffer.h',
-      'string_bytes.cc',
-      'string_bytes.h',
-      'string_search.cc',
-      'string_search.h']],
-  ['cares', ['cares_wrap.cc']],
-  ['child_process', ['process_wrap.cc', 'spawn_sync.cc', 'spawn_sync.h']],
-  ['crypto',
-    ['node_crypto.cc',
-      'node_crypto.h',
-      'node_crypto_bio.cc',
-      'node_crypto_bio.h',
-      'node_crypto_clienthello-inl.h',
-      'node_crypto_clienthello.cc',
-      'node_crypto_clienthello.h',
-      'node_crypto_groups.h']],
-  ['debugger', ['debug-agent.cc', 'debug-agent.h', 'node_debug_options.cc']],
-  ['dgram', ['udp_wrap.cc', 'udp_wrap.h']],
-  ['fs',
-    ['fs_event_wrap.cc',
-      'node_file.cc',
-      'node_file.h',
-      'node_stat_watcher.cc',
-      'node_stat_watcher.h']],
-  ['http_parser', ['node_http_parser.cc', 'node_http_parser.h']],
-  ['intl', ['node_i18n.cc', 'node_i18n.h']],
-  ['libuv', ['uv.cc']],
-  ['net',
-    ['connect_wrap.cc',
-      'connect_wrap.h',
-      'connection_wrap.cc',
-      'connection_wrap.h',
-      'pipe_wrap.cc',
-      'pipe_wrap.h',
-      'tcp_wrap.cc',
-      'tcp_wrap.h']],
-  ['os', ['node_os.cc']],
-  ['process', ['node_main.cc', 'signal_wrap.cc']],
-  ['timers', ['timer_wrap.cc']],
-  ['tracing',
-    ['tracing/agent.cc',
-      'tracing/agent.h',
-      'tracing/node_trace_buffer.cc',
-      'tracing/node_trace_buffer.h',
-      'tracing/node_trace_writer.cc',
-      'tracing/node_trace_writer.h',
-      'tracing/trace_event.cc',
-      'tracing/trace_event.h']],
-  ['tls',
-    ['CNNICHashWhitelist.inc',
-      'node_root_certs.h',
-      'tls_wrap.cc',
-      'tls_wrap.h']],
-  ['tty', ['tty_wrap.cc', 'tty_wrap.h']],
-  [['url-whatwg'],
-    ['node_url.cc', 'node_url.h']],
-  ['util', ['node_util.cc']],
-  ['V8 Engine', ['node_v8.cc', 'v8abbr.h']],
-  ['vm', ['node_contextify.cc']],
-  ['windows',
-    ['backtrace_win32.cc',
-      'node_win32_etw_provider-inl.h',
-      'node_win32_etw_provider.cc',
-      'node_win32_etw_provider.h',
-      'node_win32_perfctr_provider.cc',
-      'node_win32_perfctr_provider.h']],
-  ['zlib', ['node_zlib.cc']]
-]
-for (const info of srcCases) {
-  let labels = info[0]
-  if (!Array.isArray(labels)) {
-    labels = [labels]
-  }
-  const files = info[1]
-  for (const file of files) {
-    tap.test(`label: "${labels.join('","')}" when ./src/${file} has been changed`, (t) => {
-      const resolved = nodeLabels.resolveLabels([`src/${file}`])
-
-      t.same(resolved, ['c++'].concat(labels))
-
-      t.end()
-    })
-  }
-}
-
-tap.test('label: not "c++" when ./src/node_version.h has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'src/node_version.h'
-  ])
-
-  t.same(labels, [])
-
-  t.end()
-})
-
-tap.test('label: not "c++" when ./src/*.py has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'src/nolttng_macros.py',
-    'src/notrace_macros.py',
-    'src/perfctr_macros.py'
-  ])
-
-  t.same(labels, ['lib / src'])
-
-  t.end()
-})
-
-tap.test('label: "inspector" when ./src/inspector_* has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'src/inspector_socket.cc'
-  ])
-
-  t.same(labels, ['c++', 'inspector'])
-
-  t.end()
-})
-
-tap.test('label: "V8 Engine" when ./deps/v8/ files has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'deps/v8/src/arguments.cc'
-  ])
-
-  t.same(labels, ['V8 Engine'])
-
-  t.end()
-})
-
-tap.test('label: "libuv" when ./deps/uv/ files has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'deps/uv/src/fs-poll.c'
-  ])
-
-  t.same(labels, ['libuv'])
-
-  t.end()
-})
-
-tap.test('label: "wasi" when ./deps/uvwasi/ files has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'deps/uvwasi/src/uvwasi.c'
-  ])
-
-  t.same(labels, ['wasi'])
-
-  t.end()
-})
-
-tap.test('label: "V8 Engine", "openssl" when ./deps/v8/ and ./deps/openssl/ files has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'deps/v8/src/arguments.cc',
-    'deps/openssl/openssl/ssl/ssl_rsa.c'
-  ])
-
-  t.same(labels, ['V8 Engine', 'openssl'])
-
-  t.end()
-})
-
-//
-// Planned tests to be resolved later
-//
-
-tap.test('label: "repl" when ./lib/repl.js has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'lib/repl.js',
-    'test/debugger/test-debugger-pid.js',
-    'test/debugger/test-debugger-repl-break-in-module.js',
-    'test/debugger/test-debugger-repl-term.js'
-  ])
-
-  t.same(labels, ['repl'])
-
-  t.end()
-})
-
-tap.test('label: "lib / src" when 4 or more JS sub-systems have been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'lib/assert.js',
-    'lib/dns.js',
-    'lib/repl.js',
-    'lib/process.js',
-    'lib/module.js'
-  ])
-
-  t.same(labels, ['lib / src'])
-
-  t.end()
-})
-
-// https://github.com/nodejs/node/pull/12366 should have been labelled "lib / src"
-// https://github.com/nodejs/github-bot/issues/137
-tap.test('label: "lib / src" when 4 or more native files have been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'node.gyp',
-    'src/cares_wrap.cc',
-    'src/fs_event_wrap.cc',
-    'src/node.cc',
-    'src/node_api.cc',
-    'src/node_buffer.cc',
-    'src/node_config.cc',
-    'src/node_constants.cc',
-    'src/node_contextify.cc',
-    'src/node_file.cc',
-    'src/node_file.h',
-    'src/node_http_parser.cc',
-    'src/node_http_parser.h',
-    'src/node_i18n.cc',
-    'src/node_revert.cc',
-    'src/node_serdes.cc',
-    'src/node_zlib.cc',
-    'src/process_wrap.cc',
-    'src/signal_wrap.cc',
-    'src/string_bytes.cc',
-    'src/timer_wrap.cc',
-    'src/uv.cc'
-  ])
-
-  t.same(labels, ['c++', 'lib / src'])
-
-  t.end()
-})
-
-// https://github.com/nodejs/node/pull/7488 wrongfully labelled with "lib / src"
-tap.test('label: not "lib / src" when only deps have been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'deps/v8/test/cctest/interpreter/bytecode_expectations/ArrayLiterals.golden',
-    'deps/v8/test/cctest/interpreter/bytecode_expectations/ArrayLiteralsWide.golden',
-    'deps/v8/test/cctest/interpreter/bytecode_expectations/AssignmentsInBinaryExpression.golden',
-    'deps/v8/test/cctest/interpreter/bytecode_expectations/BasicBlockToBoolean.golden',
-    'deps/v8/test/cctest/interpreter/bytecode_expectations/BasicLoops.golden'
-  ])
-
-  t.same(labels, ['V8 Engine'])
-
-  t.end()
-})
-
-tap.test('label: "JS sub-systems when less than 4 sub-systems have changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'lib/assert.js',
-    'lib/dns.js',
-    'lib/repl.js',
-    'lib/process.js'
-  ])
-
-  t.same(labels, ['assert', 'dns', 'repl', 'process'])
-
-  t.end()
-})
-
-tap.test('label: "meta" when meta-info files have changed', (t) => {
-  // e.g. LICENSE, AUTHORS, some ./*.md files
-  const labels = nodeLabels.resolveLabels([
-    '.gitattributes',
-    '.gitignore',
-    '.mailmap',
-    'AUTHORS',
-    'LICENSE',
-    'CHANGELOG.md',
-    'CODE_OF_CONDUCT.md',
-    'GOVERNANCE.md',
-    'ROADMAP.md',
-    'WORKING_GROUPS.md'
-  ])
-
-  t.same(labels, ['meta'])
-
-  t.end()
-})
-
-tap.test('label: not "meta" when other top-level have been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'BUILDING.md',
-    'README.md',
-    'COLLABORATOR_GUIDE.md',
-    'CONTRIBUTING.md',
-    'configure'
-  ])
-
-  t.same(labels.indexOf('meta'), -1)
-
-  t.end()
-})
-
-tap.test('label: "doc" when top-level .md files have changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'BUILDING.md',
-    'README.md'
-  ])
-
-  t.same(labels, ['build', 'doc'])
-
-  t.end()
-})
-
-tap.test('label: not "doc" when other top-level files have been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'LICENSE',
-    'configure',
-    '.mailmap'
-  ])
-
-  t.same(labels.indexOf('doc'), -1)
-
-  t.end()
-})
-
-tap.test('label: version labels (old)', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'common.gypi'
-  ], 'v0.12')
-
-  t.same(labels, ['build', 'v0.12'])
-
-  t.end()
-})
-
-tap.test('label: version labels (old, staging)', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'common.gypi'
-  ], 'v0.12-staging')
-
-  t.same(labels, ['build', 'v0.12'])
-
-  t.end()
-})
-
-tap.test('label: version labels (new)', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'deps/v8/include/v8-version.h',
-    'deps/v8/src/crankshaft/hydrogen.cc',
-    'deps/v8/test/mjsunit/regress/regress-5033.js'
-  ], 'v6.x')
-
-  t.same(labels, ['V8 Engine', 'v6.x'])
-
-  t.end()
-})
-
-tap.test('label: version labels (new, staging)', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'deps/v8/include/v8-version.h',
-    'deps/v8/src/crankshaft/hydrogen.cc',
-    'deps/v8/test/mjsunit/regress/regress-5033.js'
-  ], 'v6.x-staging')
-
-  t.same(labels, ['V8 Engine', 'v6.x'])
-
-  t.end()
-})
-
-tap.test('label: no version labels (master)', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'deps/v8/include/v8-version.h',
-    'deps/v8/src/crankshaft/hydrogen.cc',
-    'deps/v8/test/mjsunit/regress/regress-5033.js'
-  ], 'master')
-
-  t.same(labels, ['V8 Engine'])
-
-  t.end()
-})
-
-tap.test('label: build label (windows)', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'vcbuild.bat'
-  ])
-
-  t.same(labels, ['build', 'windows'])
-
-  t.end()
-})
-
-tap.test('label: doc label for non-subsystem API doc changes', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'doc/api/_toc.md',
-    'doc/api/all.md'
-  ])
-
-  t.same(labels, ['doc'])
-
-  t.end()
-})
-
-const specificBenchmarks = [
-  [[], ['fixtures/alice.html', 'misc/freelist.js']],
-  ['assert', ['assert/deepequal-buffer.js']],
-  ['buffer', ['buffers/buffer-base64-decode.js']],
-  ['child_process', ['child_process/child-process-exec-stdout.js']],
-  ['crypto', ['crypto/aes-gcm-throughput.js']],
-  ['dgram', ['dgram/bind-params.js']],
-  ['domain', ['domain/domain-fn-args.js']],
-  ['events', ['events/ee-emit.js']],
-  ['fs', ['fs/readfile.js']],
-  ['http', ['_http-benchmarkers.js', 'http/simple.js']],
-  ['module', ['module/module-loader.js']],
-  ['net', ['net/net-c2s.js']],
-  ['os', ['os/loadavg.js']],
-  ['path', ['path/basename-posix.js']],
-  ['process', ['process/memoryUsage.js']],
-  ['querystring', ['querystring/querystring-parse.js']],
-  ['stream', ['streams/readable-readall.js']],
-  ['string_decoder', ['string_decoder/string-decoder.js']],
-  ['timers', ['timers/set-immediate-depth.js']],
-  ['tls', ['tls/throughput.js']],
-  ['url', ['url/url-resolve.js']],
-  ['util', ['util/format.js']],
-  ['V8 Engine', ['arrays/var-int.js', 'es/defaultparams-bench.js']],
-  ['vm', ['vm/run-in-context.js']]
-]
-for (const info of specificBenchmarks) {
-  let labels = info[0]
-  if (!Array.isArray(labels)) {
-    labels = ['benchmark', labels]
-  } else {
-    labels = ['benchmark'].concat(labels)
-  }
-  const files = info[1]
-  for (const file of files) {
-    tap.test(`label: "${labels.join('","')}" when ./benchmark/${file} has been changed`, (t) => {
-      const resolved = nodeLabels.resolveLabels([`benchmark/${file}`])
-
-      t.same(resolved, labels)
-
-      t.end()
-    })
-  }
-}
-
-const moreTools = [
-  '.eslintignore', '.editorconfig', '.eslintrc.yaml', '.remarkrc'
-]
-for (const file of moreTools) {
-  tap.test(`label: "tools" when ${file} has been changed`, (t) => {
-    const resolved = nodeLabels.resolveLabels([`${file}`])
-
-    t.same(resolved, ['tools'])
-
-    t.end()
-  })
-}
-
-const specificTests = [
-  ['addons', ['addons/async-hello-world/binding.cc']],
-  ['debugger', ['debugger/test-debugger-repl.js']],
-  [['doc', 'tools'], ['doctool/test-doctool-html.js']],
-  [['inspector'],
-    ['inspector/test-inspector.js', 'cctest/test_inspector_socket.cc']],
-  ['timers', ['timers/test-timers-reliability.js']],
-  ['tty', ['pseudo-tty/stdin-setrawmode.js']],
-  [['url-whatwg'],
-    ['cctest/test_url.cc']]
-]
-for (const info of specificTests) {
-  let labels = info[0]
-  if (!Array.isArray(labels)) {
-    labels = ['test', labels]
-  } else {
-    labels = ['test'].concat(labels)
-  }
-  const files = info[1]
-  for (const file of files) {
-    tap.test(`label: "${labels.join('","')}" when ./test/${file} has been changed`, (t) => {
-      const resolved = nodeLabels.resolveLabels([`test/${file}`])
-
-      t.same(resolved, labels)
-
-      t.end()
-    })
-  }
-}
-
-const specificTools = [
-  ['build', ['gyp/gyp_main.py', 'gyp_node.py']],
-  ['doc', ['doc/generate.js']],
-  ['intl', ['icu/icu-generate.gyp']],
-  ['macos',
-    ['macosx-firewall.sh',
-      'osx-codesign.sh']],
-  [['macos', 'install'],
-    ['osx-pkg.pmdoc/index.xml.tmpl',
-      'pkgsrc/description']],
-  [['test', 'npm'], ['test-npm.sh', 'test-npm-package.js']],
-  [['test'], ['test.py']],
-  [['openssl', 'tls'], ['certdata.txt', 'mkssldef.py', 'mk-ca-bundle.pl']],
-  [['windows'], ['sign.bat']],
-  [['windows', 'install'], ['msvs/msi/product.wxs']],
-  [['V8 Engine'], ['make-v8.sh']]
-]
-for (const info of specificTools) {
-  let labels = info[0]
-  if (!Array.isArray(labels)) {
-    labels = ['tools', labels]
-  } else {
-    labels = ['tools'].concat(labels)
-  }
-  const files = info[1]
-  for (const file of files) {
-    tap.test(`label: "${labels.join('","')}" when ./tools/${file} has been changed`, (t) => {
-      const resolved = nodeLabels.resolveLabels([`tools/${file}`])
-
-      t.same(resolved, labels)
-
-      t.end()
-    })
-  }
-}
-
-[
-  [['V8 Engine', 'post-mortem'],
-    ['deps/v8/tools/gen-postmortem-metadata.py']],
-  [['c++', 'n-api'],
-    ['src/node_api.cc', 'src/node_api.h', 'src/node_api_types.h']],
-  [['test', 'n-api'],
-    ['test/addons-napi/foo']],
-  [['doc', 'n-api'],
-    ['doc/api/n-api.md']]
-].forEach((info) => {
-  const labels = info[0]
-  const files = info[1]
-  for (const file of files) {
-    tap.test(`label: "${labels.join('","')}" when ./${file} has been changed`, (t) => {
-      const resolved = nodeLabels.resolveLabels([file])
-
-      t.same(resolved, labels)
-
-      t.end()
-    })
-  }
-});
-
-[
-  [['async_hooks'], ['lib/async_hooks.js']],
-  [['test', 'async_hooks'], ['test/async-hooks/test-connection.ssl.js']]
-].forEach((info) => {
-  const labels = info[0]
-  const files = info[1]
-  for (const file of files) {
-    tap.test(`label: "${labels.join('","')}" when ./${file} has been changed`, (t) => {
-      const resolved = nodeLabels.resolveLabels([file])
-
-      t.same(resolved, labels)
-
-      t.end()
-    })
-  }
-})
-
-tap.test('label: "build" when ./android-configure has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    'android-configure'
-  ])
-
-  t.same(labels, ['build'])
-
-  t.end()
-})
-
-tap.test('label: "build" when ./.travis.yml has been changed', (t) => {
-  const labels = nodeLabels.resolveLabels([
-    '.travis.yml'
-  ])
-
-  t.same(labels, ['build'])
-
-  t.end()
-});
-
-[
-  [['http2', 'dont-land-on-v6.x'],
-    ['lib/http2.js',
-      'lib/internal/http2/core.js',
-      'deps/nghttp2/lib/nghttp2_buf.c']],
-  [['c++', 'http2', 'dont-land-on-v6.x'],
-    ['src/node_http2.cc',
-      'src/node_http2.h',
-      'src/node_http2_core.h',
-      'src/node_http2_core-inl.h']],
-  [['build', 'http2', 'dont-land-on-v6.x'],
-    ['deps/nghttp2/nghttp2.gyp']],
-  [['doc', 'http2'], ['doc/api/http2.md']]
-].forEach((info) => {
-  const labels = info[0]
-  const files = info[1]
-  for (const file of files) {
-    tap.test(`label: "${labels.join('","')}" when ./${file} has been changed`, (t) => {
-      const resolved = nodeLabels.resolveLabels([file])
-
-      t.same(resolved, labels)
-
-      t.end()
-    })
-  }
-});
-
-[
-  [['c++', 'report'],
-    ['src/node_report.cc',
-      'src/node_report.h',
-      'src/node_report_module.cc',
-      'src/node_report_utils.cc']],
-  [['doc', 'report'], ['doc/api/report.md']],
-  [['test', 'report'], ['test/report/test-report-config.js']]
-].forEach((info) => {
-  const labels = info[0]
-  const files = info[1]
-  for (const file of files) {
-    tap.test(`label: "${labels.join('","')}" when ./${file} has been changed`, (t) => {
-      const resolved = nodeLabels.resolveLabels([file])
-
-      t.same(resolved, labels)
-
-      t.end()
-    })
-  }
-});
-
-[
-  // wasi
-  [['wasi'],
-    ['lib/wasi.js']],
-  [['c++', 'wasi'],
-    ['src/node_wasi.cc',
-      'src/node_wasi.h']],
-  [['doc', 'wasi'], ['doc/api/wasi.md']],
-
-  // worker
-  [['worker'],
-    ['lib/worker_threads.js',
-      'lib/internal/worker.js',
-      'lib/internal/worker/io.js']],
-  [['c++', 'worker'],
-    ['src/node_worker.cc',
-      'src/node_worker.h']],
-  [['doc', 'worker'], ['doc/api/worker_threads.md']]
-].forEach((info) => {
-  const labels = info[0]
-  const files = info[1]
-  for (const file of files) {
-    tap.test(`label: "${labels.join('","')}" when ./${file} has been changed`, (t) => {
-      const resolved = nodeLabels.resolveLabels([file])
-
-      t.same(resolved, labels)
-
-      t.end()
-    })
-  }
-})
diff --git a/test/unit/node-repo.test.js b/test/unit/node-repo.test.js
index 1efcba95..32d12312 100644
--- a/test/unit/node-repo.test.js
+++ b/test/unit/node-repo.test.js
@@ -1,7 +1,6 @@
 'use strict'
 
 const tap = require('tap')
-const lolex = require('lolex')
 const nock = require('nock')
 
 const nodeRepo = require('../../lib/node-repo')
@@ -10,91 +9,6 @@ const logger = require('../../lib/logger')
 const readFixture = require('../read-fixture')
 const { ignoreQueryParams } = require('../common')
 
-tap.test('fetchExistingLabels(): caches existing repository labels', async (t) => {
-  const owner = 'nodejs'
-  const repo = 'node1'
-  // Test passes if nock is only called once, no other checks to run
-  const scope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get(`/repos/${owner}/${repo}/labels`)
-    .once() // should only be called once
-    .reply(200, [])
-
-  await nodeRepo._fetchExistingLabels({ owner, repo, logger })
-  await nodeRepo._fetchExistingLabels({ owner, repo, logger })
-  scope.done()
-})
-
-tap.test('fetchExistingLabels(): cache expires after one hour', async (t) => {
-  const owner = 'nodejs'
-  const repo = 'node2'
-  const clock = lolex.install()
-
-  // Test passes if nock is only called once, no other checks to run
-  const scope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get(`/repos/${owner}/${repo}/labels`)
-    .twice() // should be called twice
-    .reply(200, [])
-
-  t.tearDown(() => {
-    clock.uninstall()
-  })
-
-  await nodeRepo._fetchExistingLabels({ owner, repo, logger })
-
-  // fetch labels again after 1 hour and 1 minute
-  clock.tick(1000 * 60 * 61)
-
-  await nodeRepo._fetchExistingLabels({ owner, repo, logger })
-  scope.done()
-})
-
-tap.test('fetchExistingLabels(): yields an array of existing label names', async (t) => {
-  const labelsFixture = readFixture('repo-labels.json')
-  const owner = 'nodejs'
-  const repo = 'node3'
-
-  const scope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get(`/repos/${owner}/${repo}/labels`)
-    .reply(200, labelsFixture.data)
-
-  t.plan(1)
-
-  const existingLabels = await nodeRepo._fetchExistingLabels({ owner, repo, logger })
-  t.ok(existingLabels.includes('cluster'))
-  scope.done()
-})
-
-tap.test('fetchExistingLabels(): can retrieve more than 100 labels', async (t) => {
-  const labelsFixturePage1 = readFixture('repo-labels.json')
-  const labelsFixturePage2 = readFixture('repo-labels-page-2.json')
-  const owner = 'nodejs'
-  const repo = 'node4'
-  const headers = {
-    'Link': `<https://api.github.com/repos/${owner}/${repo}/labels?page=2>; rel="next"`
-  }
-
-  const firstPageScope = nock('https://api.github.com')
-    .filteringPath(ignoreQueryParams)
-    .get(`/repos/${owner}/${repo}/labels`)
-    .reply(200, labelsFixturePage1.data, headers)
-
-  const secondPageScope = nock('https://api.github.com')
-    .get(`/repos/${owner}/${repo}/labels`)
-    .query({ page: 2, per_page: 100 })
-    .reply(200, labelsFixturePage2.data)
-
-  t.plan(2)
-
-  const existingLabels = await nodeRepo._fetchExistingLabels({ owner, repo, logger })
-  t.ok(existingLabels.includes('cluster'))
-  t.ok(existingLabels.includes('windows'))
-  firstPageScope.done()
-  secondPageScope.done()
-})
-
 tap.test('getBotPrLabels(): returns labels added by nodejs-github-bot', (t) => {
   const events = readFixture('pull-request-events.json')