diff --git a/railties/test/generators/app_generator_test.rb b/railties/test/generators/app_generator_test.rb
index 4f405fc8efac4..3df6dc5b6b888 100644
--- a/railties/test/generators/app_generator_test.rb
+++ b/railties/test/generators/app_generator_test.rb
@@ -739,11 +739,11 @@ def test_skip_javascript_option
   def test_webpack_option
     generator([destination_root], javascript: "webpack")
 
-    webpacker_called = 0
+    webpack_called = 0
     command_check = -> command, *_ do
       case command
       when "javascript:install:webpack"
-        webpacker_called += 1
+        webpack_called += 1
       end
     end
 
@@ -751,7 +751,7 @@ def test_webpack_option
       run_generator_instance
     end
 
-    assert_equal 1, webpacker_called, "`javascript:install:webpack` expected to be called once, but was called #{webpacker_called} times."
+    assert_equal 1, webpack_called, "`javascript:install:webpack` expected to be called once, but was called #{webpack_called} times."
     assert_gem "jsbundling-rails"
     assert_node_files
   end
diff --git a/railties/test/isolation/assets/config/webpack/base.js b/railties/test/isolation/assets/config/webpack/base.js
deleted file mode 100644
index a081a4abd6458..0000000000000
--- a/railties/test/isolation/assets/config/webpack/base.js
+++ /dev/null
@@ -1,3 +0,0 @@
-const { webpackConfig } = require('@rails/webpacker')
-
-module.exports = webpackConfig
diff --git a/railties/test/isolation/assets/config/webpack/development.js b/railties/test/isolation/assets/config/webpack/development.js
deleted file mode 100644
index c84a413b59dfe..0000000000000
--- a/railties/test/isolation/assets/config/webpack/development.js
+++ /dev/null
@@ -1,5 +0,0 @@
-process.env.NODE_ENV = process.env.NODE_ENV || 'development'
-
-const webpackConfig = require('./base')
-
-module.exports = webpackConfig
diff --git a/railties/test/isolation/assets/config/webpack/production.js b/railties/test/isolation/assets/config/webpack/production.js
deleted file mode 100644
index c41e0436014e0..0000000000000
--- a/railties/test/isolation/assets/config/webpack/production.js
+++ /dev/null
@@ -1,5 +0,0 @@
-process.env.NODE_ENV = process.env.NODE_ENV || 'production'
-
-const webpackConfig = require('./base')
-
-module.exports = webpackConfig
diff --git a/railties/test/isolation/assets/config/webpack/test.js b/railties/test/isolation/assets/config/webpack/test.js
deleted file mode 100644
index c84a413b59dfe..0000000000000
--- a/railties/test/isolation/assets/config/webpack/test.js
+++ /dev/null
@@ -1,5 +0,0 @@
-process.env.NODE_ENV = process.env.NODE_ENV || 'development'
-
-const webpackConfig = require('./base')
-
-module.exports = webpackConfig
diff --git a/railties/test/isolation/assets/config/webpacker.yml b/railties/test/isolation/assets/config/webpacker.yml
deleted file mode 100644
index c1707a862b47e..0000000000000
--- a/railties/test/isolation/assets/config/webpacker.yml
+++ /dev/null
@@ -1,61 +0,0 @@
-# Note: You must restart bin/webpack-dev-server for changes to take effect
-
-default: &default
-  source_path: app/packs
-  source_entry_path: entrypoints
-  public_root_path: public
-  public_output_path: packs
-  cache_path: tmp/webpacker
-  webpack_compile_output: true
-
-  # Additional paths webpack should look up modules
-  # ['app/assets', 'engine/foo/app/assets']
-  additional_paths: []
-
-  # Reload manifest.json on all requests so we reload latest compiled packs
-  cache_manifest: false
-
-development:
-  <<: *default
-  compile: true
-
-  # Reference: https://webpack.js.org/configuration/dev-server/
-  dev_server:
-    https: false
-    host: localhost
-    port: 3035
-    public: localhost:3035
-    # Hot Module Replacement updates modules while the application is running without a full reload
-    hmr: false
-    # Should we show a full-screen overlay in the browser when there are compiler errors or warnings?
-    overlay: true
-    # Should we use gzip compression?
-    compress: true
-    # Note that apps that do not check the host are vulnerable to DNS rebinding attacks
-    disable_host_check: true
-    # This option lets the browser open with your local IP
-    use_local_ip: false
-    # When enabled, nothing except the initial startup information will be written to the console.
-    # This also means that errors or warnings from webpack are not visible.
-    quiet: false
-    pretty: true
-    headers:
-      'Access-Control-Allow-Origin': '*'
-    watch_options:
-      ignored: '**/node_modules/**'
-
-test:
-  <<: *default
-  compile: true
-
-  # Compile test packs to a separate directory
-  public_output_path: packs-test
-
-production:
-  <<: *default
-
-  # Production depends on precompilation of packs prior to booting for performance.
-  compile: false
-
-  # Cache manifest.json for performance
-  cache_manifest: true
diff --git a/railties/test/isolation/assets/package.json b/railties/test/isolation/assets/package.json
index 7f4565c2903a2..1eec482908dd5 100644
--- a/railties/test/isolation/assets/package.json
+++ b/railties/test/isolation/assets/package.json
@@ -4,7 +4,6 @@
   "dependencies": {
     "@rails/actioncable": "file:../../../../actioncable",
     "@rails/activestorage": "file:../../../../activestorage",
-    "@rails/ujs": "file:../../../../actionview",
-    "@rails/webpacker": "^6.0.0-rc.5"
+    "@rails/ujs": "file:../../../../actionview"
   }
 }