diff --git a/gulp-tasks/utils/build-browser-bundle.js b/gulp-tasks/utils/build-browser-bundle.js
index 9d1806af1..0465e49a6 100644
--- a/gulp-tasks/utils/build-browser-bundle.js
+++ b/gulp-tasks/utils/build-browser-bundle.js
@@ -120,16 +120,18 @@ module.exports = (packagePath, buildType) => {
     return Promise.reject(ERROR_NO_NAMSPACE + ' ' + packageName);
   }
 
-  let outputFilename = `${packageName}.${buildType.slice(0, 4)}.js`;
+  let outputFilename = pkgJson.workbox.outputFilename || packageName;
   if (pkgJson.workbox.prodOnly) {
     // Bail out early if this is a non-prod build.
     if (buildType !== constants.BUILD_TYPES.prod) {
       return Promise.resolve();
     }
-    // If it is a prod build, then we don't have to bother including the
-    // buildType in the filename, since there is no dev build.
-    outputFilename = `${packageName}.js`;
+  } else {
+    // Prod-only builds (above) don't need the build type, but when there's a
+    // dev and prod build we have to include it.
+    outputFilename += `.${buildType.slice(0, 4)}`;
   }
+  outputFilename += '.js';
 
   const namespace = pkgJson.workbox.browserNamespace;
   const outputDirectory = path.join(packagePath,
diff --git a/gulp-tasks/utils/get-packages-of-type.js b/gulp-tasks/utils/get-packages.js
similarity index 54%
rename from gulp-tasks/utils/get-packages-of-type.js
rename to gulp-tasks/utils/get-packages.js
index f7bfd5854..39eb4886a 100644
--- a/gulp-tasks/utils/get-packages-of-type.js
+++ b/gulp-tasks/utils/get-packages.js
@@ -9,14 +9,21 @@
 const glob = require('glob');
 const path = require('path');
 
-module.exports = (root, type) => {
+
+const DEFAULT_ROOT = path.join(__dirname, '..', '..');
+
+
+const getPackages = ({type, root = DEFAULT_ROOT} = {}) => {
   const pathToPkgJsons = glob.sync('packages/*/package.json', {cwd: root});
-  return pathToPkgJsons.filter((pathToPkgJson) => {
+
+  return pathToPkgJsons.map((pathToPkgJson) => {
     const pkg = require(`${path.resolve(root)}/${pathToPkgJson}`);
-    return pkg.workbox && (pkg.workbox.packageType === type);
-  }).map((pathToPkgJson) => {
-    // Since we matched the glob pattern then we know that this will always
-    // return the name of the package.
-    return pathToPkgJson.split('/')[1];
+    return pkg;
+  }).filter((pkg) => {
+    return pkg.workbox && pkg.workbox.packageType === type;
   });
 };
+
+module.exports = {
+  getPackages,
+};
diff --git a/gulp-tasks/utils/output-filename-to-package-map.js b/gulp-tasks/utils/output-filename-to-package-map.js
new file mode 100644
index 000000000..f6a1e3035
--- /dev/null
+++ b/gulp-tasks/utils/output-filename-to-package-map.js
@@ -0,0 +1,22 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+const {getPackages} = require('./get-packages');
+
+
+const outputFilenameToPkgMap = {};
+getPackages({type: 'browser'}).forEach((pkg) => {
+  // When no `outputFilename` property exists, the package name is used.
+  const outputFilename = pkg.workbox.outputFilename || pkg.name;
+
+  outputFilenameToPkgMap[outputFilename] = pkg;
+});
+
+module.exports = {
+  outputFilenameToPkgMap,
+};
diff --git a/gulp-tasks/utils/publish-helpers.js b/gulp-tasks/utils/publish-helpers.js
index afe21ada9..13548cb55 100644
--- a/gulp-tasks/utils/publish-helpers.js
+++ b/gulp-tasks/utils/publish-helpers.js
@@ -13,7 +13,7 @@ const archiver = require('archiver');
 const oneLine = require('common-tags').oneLine;
 
 const constants = require('./constants');
-const getPackagesOfType = require('./get-packages-of-type');
+const {getPackages} = require('./get-packages');
 const logHelper = require('../../infra/utils/log-helper');
 const spawn = require('./spawn-promise-wrapper');
 
@@ -106,7 +106,10 @@ const groupBuildFiles = async (tagName, gitBranch) => {
 
     const sourceCodePath = path.join(getBuildPath(tagName), SOURCE_CODE_DIR);
 
-    const browserPackages = getPackagesOfType(sourceCodePath, 'browser');
+    const browserPackages = getPackages({
+      type: 'browser',
+      root: sourceCodePath,
+    });
 
     const pattern = path.posix.join(
         sourceCodePath, 'packages', `{${browserPackages.join(',')}}`,
diff --git a/infra/testing/server/routes/build-file.js b/infra/testing/server/routes/build-file.js
index c1400fd04..31475501e 100644
--- a/infra/testing/server/routes/build-file.js
+++ b/infra/testing/server/routes/build-file.js
@@ -7,20 +7,22 @@
 */
 
 const path = require('path');
-
 const constants = require('../../../../gulp-tasks/utils/constants');
+const {outputFilenameToPkgMap} = require('../../../../gulp-tasks/utils/output-filename-to-package-map');
+
 
-const match = '/__WORKBOX/buildFile/:moduleInfo';
+const ROOT_DIR = path.join(__dirname, '..', '..', '..', '..');
+const match = '/__WORKBOX/buildFile/:packageFile';
 
 async function handler(req, res) {
-  const {moduleInfo} = req.params;
-  const [moduleName, buildType, extension] = moduleInfo.split('.', 3);
+  const {packageFile} = req.params;
+  const [outputFilename, buildType, extension] = packageFile.split('.', 3);
 
-  const packagePath = `../../../../packages/${moduleName}`;
-  const {main} = require(`${packagePath}/package.json`);
+  const pkg = outputFilenameToPkgMap[outputFilename];
+  const packagePath = path.join(ROOT_DIR, 'packages', pkg.name);
+  const buildPath = path.dirname(path.join(packagePath, pkg.main));
 
-  const buildPath = path.dirname(path.join(packagePath, main));
-  let fileName = path.basename(main);
+  let fileName = path.basename(pkg.main);
 
   if (buildType) {
     fileName = fileName.replace('.prod.', `.${buildType}.`);
diff --git a/packages/workbox-google-analytics/package.json b/packages/workbox-google-analytics/package.json
index 7ef4f4a83..741f39f99 100644
--- a/packages/workbox-google-analytics/package.json
+++ b/packages/workbox-google-analytics/package.json
@@ -23,9 +23,10 @@
   },
   "workbox": {
     "browserNamespace": "workbox.googleAnalytics",
+    "outputFilename": "workbox-offline-ga",
     "packageType": "browser"
   },
-  "main": "build/workbox-google-analytics.prod.js",
+  "main": "build/workbox-offline-ga.prod.js",
   "module": "index.mjs",
   "dependencies": {
     "workbox-background-sync": "^3.6.2",
diff --git a/packages/workbox-sw/controllers/WorkboxSW.mjs b/packages/workbox-sw/controllers/WorkboxSW.mjs
index f1c834fca..3f276a20a 100644
--- a/packages/workbox-sw/controllers/WorkboxSW.mjs
+++ b/packages/workbox-sw/controllers/WorkboxSW.mjs
@@ -16,7 +16,7 @@ const MODULE_KEY_TO_NAME_MAPPING = {
   cacheableResponse: 'cacheable-response',
   core: 'core',
   expiration: 'cache-expiration',
-  googleAnalytics: 'google-analytics',
+  googleAnalytics: 'offline-ga',
   navigationPreload: 'navigation-preload',
   precaching: 'precaching',
   rangeRequests: 'range-requests',
diff --git a/test/workbox-build/node/entry-points/generate-sw.js b/test/workbox-build/node/entry-points/generate-sw.js
index c00a20adb..ce70500bb 100644
--- a/test/workbox-build/node/entry-points/generate-sw.js
+++ b/test/workbox-build/node/entry-points/generate-sw.js
@@ -182,14 +182,14 @@ describe(`[workbox-build] entry-points/generate-sw.js (End to End)`, function()
         'workbox-core.dev.js.map',
         'workbox-core.prod.js',
         'workbox-core.prod.js.map',
-        'workbox-google-analytics.dev.js',
-        'workbox-google-analytics.dev.js.map',
-        'workbox-google-analytics.prod.js',
-        'workbox-google-analytics.prod.js.map',
         'workbox-navigation-preload.dev.js',
         'workbox-navigation-preload.dev.js.map',
         'workbox-navigation-preload.prod.js',
         'workbox-navigation-preload.prod.js.map',
+        'workbox-offline-ga.dev.js',
+        'workbox-offline-ga.dev.js.map',
+        'workbox-offline-ga.prod.js',
+        'workbox-offline-ga.prod.js.map',
         'workbox-precaching.dev.js',
         'workbox-precaching.dev.js.map',
         'workbox-precaching.prod.js',
diff --git a/test/workbox-google-analytics/static/basic-example/sw.js b/test/workbox-google-analytics/static/basic-example/sw.js
index 492eb2881..d19113b97 100644
--- a/test/workbox-google-analytics/static/basic-example/sw.js
+++ b/test/workbox-google-analytics/static/basic-example/sw.js
@@ -6,13 +6,10 @@
   https://opensource.org/licenses/MIT.
 */
 
-/* globals workbox */
+importScripts('/__WORKBOX/buildFile/workbox-sw');
+importScripts('/infra/testing/comlink/sw-interface.js');
 
-importScripts('/__WORKBOX/buildFile/workbox-core');
-importScripts('/__WORKBOX/buildFile/workbox-background-sync');
-importScripts('/__WORKBOX/buildFile/workbox-routing');
-importScripts('/__WORKBOX/buildFile/workbox-strategies');
-importScripts('/__WORKBOX/buildFile/workbox-google-analytics');
+workbox.setConfig({modulePathPrefix: '/__WORKBOX/buildFile/'});
 
 // Spy on .fetch() calls from inside the service worker.
 // If `simulateOffline` is set to true, throw a network error.
diff --git a/test/workbox-sw/node/test-WorkboxSW.mjs b/test/workbox-sw/node/test-WorkboxSW.mjs
index 30b05afd4..3adf3f371 100644
--- a/test/workbox-sw/node/test-WorkboxSW.mjs
+++ b/test/workbox-sw/node/test-WorkboxSW.mjs
@@ -8,13 +8,11 @@
 
 import {expect} from 'chai';
 import sinon from 'sinon';
-import path from 'path';
-import fs from 'fs-extra';
 import generateTestVariants from '../../../infra/testing/generate-variant-tests';
 import WorkboxSW from '../../../packages/workbox-sw/controllers/WorkboxSW.mjs';
-import getPackagesOfType from '../../../gulp-tasks/utils/get-packages-of-type';
+import {getPackages} from '../../../gulp-tasks/utils/get-packages';
+import {outputFilenameToPkgMap} from '../../../gulp-tasks/utils/output-filename-to-package-map';
 
-const ROOT_DIR = path.join(__dirname, '..', '..', '..');
 
 describe(`[workbox-sw] WorkboxSW`, function() {
   let sandbox = sinon.createSandbox();
@@ -30,11 +28,12 @@ describe(`[workbox-sw] WorkboxSW`, function() {
         return;
       }
 
-      const packageName = match[1];
-      const pkgJson = fs.readJSONSync(path.join(ROOT_DIR, 'packages', packageName, 'package.json'));
-      const namespace = pkgJson.workbox.browserNamespace.split('.')[1];
+      const outputFilename = match[1];
+      const pkg = outputFilenameToPkgMap[outputFilename];
+
+      const namespace = pkg.workbox.browserNamespace.split('.')[1];
       self.workbox[namespace] = {
-        injectedMsg: `Injected value for ${packageName}.`,
+        injectedMsg: `Injected value for ${pkg.name}.`,
       };
     });
   });
@@ -231,12 +230,9 @@ describe(`[workbox-sw] WorkboxSW`, function() {
     });
   });
 
-  const browserPackages = getPackagesOfType(ROOT_DIR, 'browser');
-  browserPackages.forEach((pkgName) => {
-    const pkg = fs.readJSONSync(path.join(ROOT_DIR, 'packages', pkgName, 'package.json'));
-    if (pkg.workbox.browserNamespace === 'workbox') {
-      return;
-    }
+  getPackages({type: 'browser'}).forEach((pkg) => {
+    // Don't test workbox-sw, which exports the `workbox` namespace.
+    if (pkg.workbox.browserNamespace === 'workbox') return;
 
     describe(`get ${pkg.workbox.browserNamespace}`, function() {
       it(`should return ${pkg.workbox.browserNamespace}`, function() {
diff --git a/test/workbox-sw/static/integration/invalid-sw.js b/test/workbox-sw/static/integration/invalid-sw.js
index 5dfffd856..dd0800e99 100644
--- a/test/workbox-sw/static/integration/invalid-sw.js
+++ b/test/workbox-sw/static/integration/invalid-sw.js
@@ -7,6 +7,9 @@
 */
 
 importScripts('/__WORKBOX/buildFile/workbox-sw');
+importScripts('/infra/testing/comlink/sw-interface.js');
+
+workbox.setConfig({modulePathPrefix: '/__WORKBOX/buildFile/'});
 
 // This is expected to lead to an error.
 const namespace = 'doesnotexist';
diff --git a/test/workbox-sw/static/integration/valid-sw.js b/test/workbox-sw/static/integration/valid-sw.js
index 3d65f7eae..af72cbc6d 100644
--- a/test/workbox-sw/static/integration/valid-sw.js
+++ b/test/workbox-sw/static/integration/valid-sw.js
@@ -7,6 +7,9 @@
 */
 
 importScripts('/__WORKBOX/buildFile/workbox-sw');
+importScripts('/infra/testing/comlink/sw-interface.js');
+
+workbox.setConfig({modulePathPrefix: '/__WORKBOX/buildFile/'});
 
 // TODO: Find some way to autogenerate this list.
 const namespaces = [
diff --git a/test/workbox-webpack-plugin/node/generate-sw.js b/test/workbox-webpack-plugin/node/generate-sw.js
index 76e46d5cb..23ba8bd7e 100644
--- a/test/workbox-webpack-plugin/node/generate-sw.js
+++ b/test/workbox-webpack-plugin/node/generate-sw.js
@@ -47,14 +47,14 @@ describe(`[workbox-webpack-plugin] GenerateSW (End to End)`, function() {
     'workbox-core.dev.js.map',
     'workbox-core.prod.js',
     'workbox-core.prod.js.map',
-    'workbox-google-analytics.dev.js',
-    'workbox-google-analytics.dev.js.map',
-    'workbox-google-analytics.prod.js',
-    'workbox-google-analytics.prod.js.map',
     'workbox-navigation-preload.dev.js',
     'workbox-navigation-preload.dev.js.map',
     'workbox-navigation-preload.prod.js',
     'workbox-navigation-preload.prod.js.map',
+    'workbox-offline-ga.dev.js',
+    'workbox-offline-ga.dev.js.map',
+    'workbox-offline-ga.prod.js',
+    'workbox-offline-ga.prod.js.map',
     'workbox-precaching.dev.js',
     'workbox-precaching.dev.js.map',
     'workbox-precaching.prod.js',
diff --git a/test/workbox-webpack-plugin/node/inject-manifest.js b/test/workbox-webpack-plugin/node/inject-manifest.js
index ba10dd736..61de0ff30 100644
--- a/test/workbox-webpack-plugin/node/inject-manifest.js
+++ b/test/workbox-webpack-plugin/node/inject-manifest.js
@@ -48,14 +48,14 @@ describe(`[workbox-webpack-plugin] InjectManifest (End to End)`, function() {
     'workbox-core.dev.js.map',
     'workbox-core.prod.js',
     'workbox-core.prod.js.map',
-    'workbox-google-analytics.dev.js',
-    'workbox-google-analytics.dev.js.map',
-    'workbox-google-analytics.prod.js',
-    'workbox-google-analytics.prod.js.map',
     'workbox-navigation-preload.dev.js',
     'workbox-navigation-preload.dev.js.map',
     'workbox-navigation-preload.prod.js',
     'workbox-navigation-preload.prod.js.map',
+    'workbox-offline-ga.dev.js',
+    'workbox-offline-ga.dev.js.map',
+    'workbox-offline-ga.prod.js',
+    'workbox-offline-ga.prod.js.map',
     'workbox-precaching.dev.js',
     'workbox-precaching.dev.js.map',
     'workbox-precaching.prod.js',