diff --git a/lib/broccoli/ember-app.js b/lib/broccoli/ember-app.js
index af23e413108..9abc5795d40 100644
--- a/lib/broccoli/ember-app.js
+++ b/lib/broccoli/ember-app.js
@@ -22,7 +22,6 @@ const concat = require('broccoli-concat');
 const BroccoliDebug = require('broccoli-debug');
 const ModuleNormalizer = require('broccoli-module-normalizer');
 const AmdFunnel = require('broccoli-amd-funnel');
-const ConfigReplace = require('broccoli-config-replace');
 const mergeTrees = require('./merge-trees');
 const WatchedDir = require('broccoli-source').WatchedDir;
 const UnwatchedDir = require('broccoli-source').UnwatchedDir;
@@ -34,7 +33,6 @@ const omitBy = require('ember-cli-lodash-subset').omitBy;
 const isNull = require('ember-cli-lodash-subset').isNull;
 const Funnel = require('broccoli-funnel');
 const logger = require('heimdalljs-logger')('ember-cli:ember-app');
-const emberAppUtils = require('../utilities/ember-app-utils');
 const addonProcessTree = require('../utilities/addon-process-tree');
 const lintAddonsByType = require('../utilities/lint-addons-by-type');
 const emberCLIBabelConfigKey = require('../utilities/ember-cli-babel-config-key');
@@ -42,8 +40,6 @@ const { isExperimentEnabled } = require('../experiments');
 const semver = require('semver');
 const DefaultPackager = require('./default-packager');
 
-const configReplacePatterns = emberAppUtils.configReplacePatterns;
-
 let DEFAULT_CONFIG = {
   storeConfigInMeta: true,
   autoRun: true,
@@ -968,36 +964,6 @@ class EmberApp {
     return this._cachedTemplateTree;
   }
 
-  /**
-    Returns the tree for /tests/index.html
-
-    @private
-    @method testIndex
-    @return {Tree} Tree for /tests/index.html
-   */
-  testIndex() {
-    let index = new Funnel(this.trees.tests, {
-      srcDir: '/',
-      files: ['index.html'],
-      destDir: '/tests',
-      annotation: 'Funnel (test index)',
-    });
-
-    let patterns = configReplacePatterns({
-      addons: this.project.addons,
-      autoRun: this.options.autoRun,
-      storeConfigInMeta: this.options.storeConfigInMeta,
-      isModuleUnification: isExperimentEnabled('MODULE_UNIFICATION') && !!this.trees.src,
-    });
-
-    return new ConfigReplace(index, this._defaultPackager.packageConfig(this.tests), {
-      configPath: path.join(this.name, 'config', 'environments', 'test.json'),
-      files: ['tests/index.html'],
-      env: 'test',
-      patterns,
-    });
-  }
-
   /*
    * Gather application and add-ons javascript files and return them in a single
    * tree.