diff --git a/packages/next/build/webpack-config.ts b/packages/next/build/webpack-config.ts
index 528715fdd5a294e..af18cf03150fddc 100644
--- a/packages/next/build/webpack-config.ts
+++ b/packages/next/build/webpack-config.ts
@@ -44,6 +44,9 @@ import { ProfilingPlugin } from './webpack/plugins/profiling-plugin'
 import { ReactLoadablePlugin } from './webpack/plugins/react-loadable-plugin'
 import { ServerlessPlugin } from './webpack/plugins/serverless-plugin'
 import { TerserPlugin } from './webpack/plugins/terser-webpack-plugin/src/index'
+import WebpackConformancePlugin, {
+  MinificationConformanceCheck,
+} from './webpack/plugins/webpack-conformance-plugin'
 
 type ExcludesFalse = <T>(x: T | false) => x is T
 
@@ -533,6 +536,11 @@ export default async function getBaseWebpackConfig(
               },
             },
           }),
+        config.experimental.conformance &&
+          !dev &&
+          new WebpackConformancePlugin({
+            tests: [new MinificationConformanceCheck()],
+          }),
       ].filter(Boolean),
     },
     recordsPath: path.join(outputPath, 'records.json'),