diff --git a/packages/ngtools/webpack/src/virtual_file_system_decorator.ts b/packages/ngtools/webpack/src/virtual_file_system_decorator.ts
index 484060f5e0..65ad145b3c 100644
--- a/packages/ngtools/webpack/src/virtual_file_system_decorator.ts
+++ b/packages/ngtools/webpack/src/virtual_file_system_decorator.ts
@@ -295,5 +295,6 @@ export class VirtualWatchFileSystemDecorator extends NodeWatchFileSystem {
     };
   }
 
-  watch = isWebpackFiveOrHigher() ? this.createWebpack5Watch : this.createWebpack4Watch();
+  // tslint:disable-next-line: no-any
+  watch = isWebpackFiveOrHigher() ? this.createWebpack5Watch() : this.createWebpack4Watch() as any;
 }
diff --git a/tests/legacy-cli/e2e/tests/basic/rebuild.ts b/tests/legacy-cli/e2e/tests/basic/rebuild.ts
index 18e84f7e20..8f2ef17dae 100644
--- a/tests/legacy-cli/e2e/tests/basic/rebuild.ts
+++ b/tests/legacy-cli/e2e/tests/basic/rebuild.ts
@@ -49,7 +49,8 @@ export default function() {
     // Count the bundles.
     .then((results) => {
       const stdout = results[0].stdout;
-      if (!/(lazy-module|0)\.js/g.test(stdout)) {
+      // First regexp is for Webpack 4; Second is for Webpack 5
+      if (!/(lazy-module|0)\.js/g.test(stdout) && !/lazy_module_ts\.js/g.test(stdout)) {
         throw new Error('Expected webpack to create a new chunk, but did not.');
       }
     })