diff --git a/aio/content/examples/testing/src/app/shared/title-case.pipe.ts b/aio/content/examples/testing/src/app/shared/title-case.pipe.ts
index df2567778d..8797f49932 100644
--- a/aio/content/examples/testing/src/app/shared/title-case.pipe.ts
+++ b/aio/content/examples/testing/src/app/shared/title-case.pipe.ts
@@ -1,7 +1,7 @@
 // #docregion
 import { Pipe, PipeTransform } from '@angular/core';
 
-@Pipe({name: 'titlecase', pure: false})
+@Pipe({name: 'titlecase', pure: true})
 /** Transform to Title Case: uppercase the first letter of the words in a string.*/
 export class TitleCasePipe implements PipeTransform {
   transform(input: string): string {