diff --git a/common.js b/common.js
index e5ea6a96..fc593f98 100644
--- a/common.js
+++ b/common.js
@@ -3,6 +3,7 @@
 const asar = require('asar')
 const child = require('child_process')
 const debug = require('debug')('electron-packager')
+const download = require('electron-download')
 const fs = require('fs-extra')
 const ignore = require('./ignore')
 const minimist = require('minimist')
@@ -81,6 +82,10 @@ function asarApp (appPath, asarOptions, cb) {
   })
 }
 
+function isPlatformMac (platform) {
+  return platform === 'darwin' || platform === 'mas'
+}
+
 function sanitizeAppName (name) {
   return sanitize(name, {replacement: '-'})
 }
@@ -116,28 +121,45 @@ function createAsarOpts (opts) {
   return asarOptions
 }
 
+function createDownloadOpts (opts, platform, arch) {
+  let downloadOpts = opts.download || {}
+
+  subOptionWarning(downloadOpts, 'download', 'platform', platform)
+  subOptionWarning(downloadOpts, 'download', 'arch', arch)
+  subOptionWarning(downloadOpts, 'download', 'version', opts.version)
+
+  return downloadOpts
+}
+
 module.exports = {
   archs: archs,
   platforms: platforms,
 
   parseCLIArgs: parseCLIArgs,
 
-  isPlatformMac: function isPlatformMac (platform) {
-    return platform === 'darwin' || platform === 'mas'
-  },
+  isPlatformMac: isPlatformMac,
 
   subOptionWarning: subOptionWarning,
 
   createAsarOpts: createAsarOpts,
+  createDownloadOpts: createDownloadOpts,
+  createDownloadCombos: function createDownloadCombos (opts, selectedPlatforms, selectedArchs, ignoreFunc) {
+    let combinations = []
+    for (let arch of selectedArchs) {
+      for (let platform of selectedPlatforms) {
+        // Electron does not have 32-bit releases for Mac OS X, so skip that combination
+        if (isPlatformMac(platform) && arch === 'ia32') continue
+        if (typeof ignoreFunc === 'function' && ignoreFunc(platform, arch)) continue
+        combinations.push(createDownloadOpts(opts, platform, arch))
+      }
+    }
 
-  createDownloadOpts: function createDownloadOpts (opts, platform, arch) {
-    let downloadOpts = opts.download || {}
-
-    subOptionWarning(downloadOpts, 'download', 'platform', platform)
-    subOptionWarning(downloadOpts, 'download', 'arch', arch)
-    subOptionWarning(downloadOpts, 'download', 'version', opts.version)
+    return combinations
+  },
 
-    return downloadOpts
+  downloadElectronZip: function downloadElectronZip (downloadOpts, cb) {
+    debug(`Downloading Electron with options ${JSON.stringify(downloadOpts)}`)
+    download(downloadOpts, cb)
   },
 
   generateFinalBasename: generateFinalBasename,
diff --git a/index.js b/index.js
index c91f3bea..25d9c82c 100644
--- a/index.js
+++ b/index.js
@@ -2,7 +2,6 @@
 
 const common = require('./common')
 const debug = require('debug')('electron-packager')
-const download = require('electron-download')
 const extract = require('extract-zip')
 const fs = require('fs-extra')
 const getPackageInfo = require('get-package-info')
@@ -92,15 +91,6 @@ function createSeries (opts, archs, platforms) {
     })
   }
 
-  var combinations = []
-  archs.forEach(function (arch) {
-    platforms.forEach(function (platform) {
-      // Electron does not have 32-bit releases for Mac OS X, so skip that combination
-      if (common.isPlatformMac(platform) && arch === 'ia32') return
-      combinations.push(common.createDownloadOpts(opts, platform, arch))
-    })
-  })
-
   var tasks = []
   var useTempDir = opts.tmpdir !== false
   if (useTempDir) {
@@ -108,14 +98,13 @@ function createSeries (opts, archs, platforms) {
       fs.remove(tempBase, cb)
     })
   }
-  return tasks.concat(combinations.map(function (combination) {
+  return tasks.concat(common.createDownloadCombos(opts, platforms, archs).map(combination => {
     var arch = combination.arch
     var platform = combination.platform
     var version = combination.version
 
-    return function (callback) {
-      debug(`Downloading Electron with options ${JSON.stringify(combination)}`)
-      download(combination, function (err, zipPath) {
+    return (callback) => {
+      common.downloadElectronZip(combination, (err, zipPath) => {
         if (err) return callback(err)
 
         function createApp (comboOpts) {
diff --git a/test/util.js b/test/util.js
index a63dfff5..14c0a40d 100644
--- a/test/util.js
+++ b/test/util.js
@@ -3,7 +3,6 @@
 const bufferEqual = require('buffer-equal')
 const common = require('../common')
 const config = require('./config.json')
-const download = require('electron-download')
 const fs = require('fs-extra')
 const path = require('path')
 const series = require('run-series')
@@ -13,22 +12,6 @@ const test = require('tape')
 const ORIGINAL_CWD = process.cwd()
 const WORK_CWD = path.join(__dirname, 'work')
 
-var combinations = []
-common.archs.forEach(function (arch) {
-  common.platforms.forEach(function (platform) {
-    // Electron does not have 32-bit releases for Mac OS X, so skip that combination
-    // Also skip testing darwin/mas target on Windows since electron-packager itself skips it
-    // (see https://github.com/electron-userland/electron-packager/issues/71)
-    if (common.isPlatformMac(platform) && (arch === 'ia32' || require('os').platform() === 'win32')) return
-
-    combinations.push({
-      arch: arch,
-      platform: platform,
-      version: config.version
-    })
-  })
-})
-
 exports.areFilesEqual = function areFilesEqual (file1, file2, callback) {
   series([
     function (cb) {
@@ -43,11 +26,17 @@ exports.areFilesEqual = function areFilesEqual (file1, file2, callback) {
 }
 
 exports.downloadAll = function downloadAll (version, callback) {
-  series(combinations.map(function (combination) {
-    return function (cb) {
+  let combinations = common.createDownloadCombos({version: config.version}, common.platforms, common.archs, (platform, arch) => {
+    // Skip testing darwin/mas target on Windows since electron-packager itself skips it
+    // (see https://github.com/electron-userland/electron-packager/issues/71)
+    return common.isPlatformMac(platform) && process.platform === 'win32'
+  })
+
+  series(combinations.map(combination => {
+    return (cb) => {
       var downloadOpts = Object.assign({}, combination)
       downloadOpts.version = version
-      download(downloadOpts, cb)
+      common.downloadElectronZip(downloadOpts, cb)
     }
   }), callback)
 }