diff --git a/packages/schematics/angular/web-worker/index.ts b/packages/schematics/angular/web-worker/index.ts
index 717a3741bfe4..012566b1df0a 100644
--- a/packages/schematics/angular/web-worker/index.ts
+++ b/packages/schematics/angular/web-worker/index.ts
@@ -62,9 +62,11 @@ function addSnippet(options: WebWorkerOptions): Rule {
       return;
     }
 
+    const fileRegExp = new RegExp(`^${options.name}.*\.ts`);
     const siblingModules = host.getDir(options.path).subfiles
-      // Find all files that start with the same name, are ts files, and aren't spec files.
-      .filter(f => f.startsWith(options.name) && f.endsWith('.ts') && !f.endsWith('spec.ts'))
+      // Find all files that start with the same name, are ts files,
+      // and aren't spec or module files.
+      .filter(f => fileRegExp.test(f) && !/(module|spec)\.ts$/.test(f))
       // Sort alphabetically for consistency.
       .sort();
 
diff --git a/packages/schematics/angular/web-worker/index_spec.ts b/packages/schematics/angular/web-worker/index_spec.ts
index bc68cba035d5..a8f6520189c1 100644
--- a/packages/schematics/angular/web-worker/index_spec.ts
+++ b/packages/schematics/angular/web-worker/index_spec.ts
@@ -11,7 +11,7 @@ import { Schema as WorkspaceOptions } from '../workspace/schema';
 import { Schema as WebWorkerOptions } from './schema';
 
 
-describe('Service Worker Schematic', () => {
+describe('Web Worker Schematic', () => {
   const schematicRunner = new SchematicTestRunner(
     '@schematics/angular',
     require.resolve('../collection.json'),
@@ -35,7 +35,7 @@ describe('Service Worker Schematic', () => {
     name: 'bar',
     inlineStyle: false,
     inlineTemplate: false,
-    routing: false,
+    routing: true,
     skipTests: false,
     skipPackageJson: false,
   };