diff --git a/aio/content/examples/http/specs.stackblitz.json b/aio/content/examples/http/specs.stackblitz.json
index 1442c98f3a..68c0874f18 100644
--- a/aio/content/examples/http/specs.stackblitz.json
+++ b/aio/content/examples/http/specs.stackblitz.json
@@ -1,6 +1,7 @@
 {
   "description": "Http Guide Testing",
   "files":[
+    "src/app/heroes/hero.ts",
     "src/app/heroes/heroes.service.ts",
     "src/app/heroes/heroes.service.spec.ts",
 
diff --git a/aio/content/examples/http/src/app/heroes/heroes.service.spec.ts b/aio/content/examples/http/src/app/heroes/heroes.service.spec.ts
index c3bf9bc7e0..bfc204b4ad 100644
--- a/aio/content/examples/http/src/app/heroes/heroes.service.spec.ts
+++ b/aio/content/examples/http/src/app/heroes/heroes.service.spec.ts
@@ -28,9 +28,9 @@ describe('HeroesService', () => {
 
     // Inject the http, test controller, and service-under-test
     // as they will be referenced by each test.
-    httpClient = TestBed.inject(HttpClient);
-    httpTestingController = TestBed.inject(HttpTestingController);
-    heroService = TestBed.inject(HeroesService);
+    httpClient = TestBed.get(HttpClient);
+    httpTestingController = TestBed.get(HttpTestingController);
+    heroService = TestBed.get(HeroesService);
   });
 
   afterEach(() => {
@@ -44,7 +44,7 @@ describe('HeroesService', () => {
     let expectedHeroes: Hero[];
 
     beforeEach(() => {
-      heroService = TestBed.inject(HeroesService);
+      heroService = TestBed.get(HeroesService);
       expectedHeroes = [
         { id: 1, name: 'A' },
         { id: 2, name: 'B' },
diff --git a/aio/content/examples/http/src/main.ts b/aio/content/examples/http/src/main.ts
index 6b6532d428..0740658908 100644
--- a/aio/content/examples/http/src/main.ts
+++ b/aio/content/examples/http/src/main.ts
@@ -1,5 +1,12 @@
 // #docregion
+import { enableProdMode } from '@angular/core';
 import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
+
 import { AppModule } from './app/app.module';
+import { environment } from './environments/environment';
+
+if (environment.production) {
+  enableProdMode();
+}
 
 platformBrowserDynamic().bootstrapModule(AppModule);
diff --git a/aio/content/examples/http/src/testing/http-client.spec.ts b/aio/content/examples/http/src/testing/http-client.spec.ts
index d098397e79..f13c15a18b 100644
--- a/aio/content/examples/http/src/testing/http-client.spec.ts
+++ b/aio/content/examples/http/src/testing/http-client.spec.ts
@@ -27,8 +27,8 @@ describe('HttpClient testing', () => {
     });
 
     // Inject the http service and test controller for each test
-    httpClient = TestBed.inject(HttpClient);
-    httpTestingController = TestBed.inject(HttpTestingController);
+    httpClient = TestBed.get(HttpClient);
+    httpTestingController = TestBed.get(HttpTestingController);
   });
   // #enddocregion setup
   // #docregion afterEach
@@ -67,6 +67,7 @@ describe('HttpClient testing', () => {
     httpTestingController.verify();
   });
   // #enddocregion get-test
+
   it('can test HttpClient.get with matching header', () => {
     const testData: Data = {name: 'Test Data'};
 
diff --git a/aio/content/examples/http/stackblitz.json b/aio/content/examples/http/stackblitz.json
index 6ef625c1a0..5d24738b29 100644
--- a/aio/content/examples/http/stackblitz.json
+++ b/aio/content/examples/http/stackblitz.json
@@ -5,7 +5,8 @@
     "!**/*.js",
 
     "!src/testing/*.*",
-    "!src/index-specs.html"
+    "!src/index-specs.html",
+    "!src/main-specs.ts"
   ],
   "tags": ["http"]
 }