diff --git a/docs/install-and-setup.md b/docs/install-and-setup.md
index bfec375f4..f01a267ff 100644
--- a/docs/install-and-setup.md
+++ b/docs/install-and-setup.md
@@ -88,7 +88,7 @@ export class AppModule {}
 
 ### 7. Inject `AngularFirestore`
 
-Open `/src/app/app.component.ts`, and make sure to modify/delete any tests to get the sample working (tests are still important, you know):
+Open `/src/app/app.component.ts`, add `import 'firebase/firestore';`, and inject `AngularFirestore` in the constructor. Then remember to update your tests to get them passing (tests are still important):
 
 ```ts
 import { Component } from '@angular/core';