diff --git a/test/unit/utils.test.js b/test/unit/utils.test.js
index bd2a1bf3e9..20182b338b 100644
--- a/test/unit/utils.test.js
+++ b/test/unit/utils.test.js
@@ -1,7 +1,5 @@
 
-import path from 'path'
 import { Utils } from '../utils'
-import PerfLoader from '../../lib/builder/webpack/utils/perf-loader'
 
 describe('utils', () => {
   test('encodeHtml', () => {
@@ -200,34 +198,6 @@ describe('utils', () => {
     const chainedFn = Utils.chainFn(firstFn, secondFn)
     expect(chainedFn({}, 10)).toEqual({ foo: 11, bar: 12 })
   })
-
-  test('performance loader', () => {
-    const perfLoader = new PerfLoader({
-      dev: true,
-      build: {
-        parallel: true,
-        cache: true
-      }
-    })
-    const js = { name: 'js', poolTimeout: Infinity }
-    const css = { name: 'css', poolTimeout: Infinity }
-    expect(perfLoader.workerPools).toMatchObject({ js, css })
-
-    const warmup = jest.fn()
-    perfLoader.threadLoader = { warmup }
-    perfLoader.warmup()
-    expect(warmup).toHaveBeenCalledTimes(2)
-    expect(warmup).toHaveBeenCalledWith(js, ['babel-loader', 'babel-preset-env'])
-    expect(warmup).toHaveBeenCalledWith(css, ['css-loader'])
-
-    const loaders = perfLoader.pool('js', { loader: 'test-perf-loader' })
-    const cacheDirectory = path.resolve('node_modules/.cache/cache-loader')
-    expect(loaders).toMatchObject([
-      { loader: 'cache-loader', options: { cacheDirectory } },
-      { loader: 'thread-loader', options: js },
-      { loader: 'test-perf-loader' }
-    ])
-  })
 })
 
 test('createRoutes should allow snake case routes', () => {
diff --git a/test/unit/wp.config.test.js b/test/unit/wp.config.test.js
new file mode 100644
index 0000000000..d99405aef5
--- /dev/null
+++ b/test/unit/wp.config.test.js
@@ -0,0 +1,33 @@
+
+import path from 'path'
+import PerfLoader from '../../lib/builder/webpack/utils/perf-loader'
+
+describe('webpack configuration', () => {
+  test('performance loader', () => {
+    const perfLoader = new PerfLoader({
+      dev: true,
+      build: {
+        parallel: true,
+        cache: true
+      }
+    })
+    const js = { name: 'js', poolTimeout: Infinity }
+    const css = { name: 'css', poolTimeout: Infinity }
+    expect(perfLoader.workerPools).toMatchObject({ js, css })
+
+    const warmup = jest.fn()
+    perfLoader.threadLoader = { warmup }
+    perfLoader.warmup()
+    expect(warmup).toHaveBeenCalledTimes(2)
+    expect(warmup).toHaveBeenCalledWith(js, ['babel-loader', 'babel-preset-env'])
+    expect(warmup).toHaveBeenCalledWith(css, ['css-loader'])
+
+    const loaders = perfLoader.pool('js', { loader: 'test-perf-loader' })
+    const cacheDirectory = path.resolve('node_modules/.cache/cache-loader')
+    expect(loaders).toMatchObject([
+      { loader: 'cache-loader', options: { cacheDirectory } },
+      { loader: 'thread-loader', options: js },
+      { loader: 'test-perf-loader' }
+    ])
+  })
+})