diff --git a/aio/content/examples/testing/src/app/demo/async-helper.spec.ts b/aio/content/examples/testing/src/app/demo/async-helper.spec.ts
index 9c9c3cb7d8..ca0239408d 100644
--- a/aio/content/examples/testing/src/app/demo/async-helper.spec.ts
+++ b/aio/content/examples/testing/src/app/demo/async-helper.spec.ts
@@ -4,86 +4,103 @@ import { interval, of } from 'rxjs';
 import { delay, take } from 'rxjs/operators';
 
 describe('Angular async helper', () => {
-  let actuallyDone = false;
 
-  beforeEach(() => { actuallyDone = false; });
+  describe('async', () => {
+    let actuallyDone = false;
 
-  afterEach(() => { expect(actuallyDone).toBe(true, 'actuallyDone should be true'); });
+    beforeEach(() => { actuallyDone = false; });
 
-  it('should run normal test', () => { actuallyDone = true; });
+    afterEach(() => { expect(actuallyDone).toBe(true, 'actuallyDone should be true'); });
 
-  it('should run normal async test', (done: DoneFn) => {
-    setTimeout(() => {
-      actuallyDone = true;
-      done();
-    }, 0);
+    it('should run normal test', () => { actuallyDone = true; });
+
+    it('should run normal async test', (done: DoneFn) => {
+      setTimeout(() => {
+        actuallyDone = true;
+        done();
+      }, 0);
+    });
+
+    it('should run async test with task',
+       async(() => { setTimeout(() => { actuallyDone = true; }, 0); }));
+
+    it('should run async test with task', async(() => {
+      const id = setInterval(() => {
+        actuallyDone = true;
+        clearInterval(id);
+      }, 100);
+    }));
+
+    it('should run async test with successful promise', async(() => {
+      const p = new Promise(resolve => { setTimeout(resolve, 10); });
+      p.then(() => { actuallyDone = true; });
+    }));
+
+    it('should run async test with failed promise', async(() => {
+      const p = new Promise((resolve, reject) => { setTimeout(reject, 10); });
+      p.catch(() => { actuallyDone = true; });
+    }));
+
+    // Use done. Can also use async or fakeAsync.
+    it('should run async test with successful delayed Observable', (done: DoneFn) => {
+      const source = of (true).pipe(delay(10));
+      source.subscribe(val => actuallyDone = true, err => fail(err), done);
+    });
+
+    it('should run async test with successful delayed Observable', async(() => {
+      const source = of (true).pipe(delay(10));
+      source.subscribe(val => actuallyDone = true, err => fail(err));
+    }));
+
+    it('should run async test with successful delayed Observable', fakeAsync(() => {
+      const source = of (true).pipe(delay(10));
+      source.subscribe(val => actuallyDone = true, err => fail(err));
+
+      tick(10);
+    }));
   });
 
-  it('should run async test with task',
-     async(() => { setTimeout(() => { actuallyDone = true; }, 0); }));
+  describe('fakeAsync', () => {
+    // #docregion fake-async-test-tick
+    it('should run timeout callback with delay after call tick with millis', fakeAsync(() => {
+        let called = false;
+        setTimeout(() => { called = true; }, 100);
+        tick(100);
+        expect(called).toBe(true);
+      }));
+    // #enddocregion fake-async-test-tick
 
-  it('should run async test with task', async(() => {
-       const id = setInterval(() => {
-         actuallyDone = true;
-         clearInterval(id);
-       }, 100);
-     }));
+    // #docregion fake-async-test-date
+    it('should get Date diff correctly in fakeAsync', fakeAsync(() => {
+        const start = Date.now();
+        tick(100);
+        const end = Date.now();
+        expect(end - start).toBe(100);
+      }));
+    // #enddocregion fake-async-test-date
 
-  it('should run async test with successful promise', async(() => {
-       const p = new Promise(resolve => { setTimeout(resolve, 10); });
-       p.then(() => { actuallyDone = true; });
-     }));
+    // #docregion fake-async-test-rxjs
+    it('should get Date diff correctly in fakeAsync with rxjs scheduler', fakeAsync(() => {
+        // need to add `import 'zone.js/dist/zone-patch-rxjs-fake-async'
+        // to patch rxjs scheduler
+        let result = null;
+        of ('hello').pipe(delay(1000)).subscribe(v => { result = v; });
+        expect(result).toBeNull();
+        tick(1000);
+        expect(result).toBe('hello');
 
-  it('should run async test with failed promise', async(() => {
-       const p = new Promise((resolve, reject) => { setTimeout(reject, 10); });
-       p.catch(() => { actuallyDone = true; });
-     }));
+        const start = new Date().getTime();
+        let dateDiff = 0;
+        interval(1000).pipe(take(2)).subscribe(() => dateDiff = (new Date().getTime() - start));
 
-  // Use done. Can also use async or fakeAsync.
-  it('should run async test with successful delayed Observable', (done: DoneFn) => {
-    const source = of (true).pipe(delay(10));
-    source.subscribe(val => actuallyDone = true, err => fail(err), done);
+        tick(1000);
+        expect(dateDiff).toBe(1000);
+        tick(1000);
+        expect(dateDiff).toBe(2000);
+      }));
+    // #enddocregion fake-async-test-rxjs
   });
 
-  // #docregion fake-async-test-tick
-  it('should run timeout callback with delay after call tick with millis', fakeAsync(() => {
-       let called = false;
-       setTimeout(() => { called = true; }, 100);
-       tick(100);
-       expect(called).toBe(true);
-     }));
-  // #enddocregion fake-async-test-tick
-
-  // #docregion fake-async-test-date
-  it('should get Date diff correctly in fakeAsync', fakeAsync(() => {
-       const start = Date.now();
-       tick(100);
-       const end = Date.now();
-       expect(end - start).toBe(100);
-     }));
-  // #enddocregion fake-async-test-date
-
-  // #docregion fake-async-test-rxjs
-  it('should get Date diff correctly in fakeAsync with rxjs scheduler', fakeAsync(() => {
-       // need to add `import 'zone.js/dist/zone-patch-rxjs-fake-async'
-       // to patch rxjs scheduler
-       let result = null;
-       of ('hello').pipe(delay(1000)).subscribe(v => { result = v; });
-       expect(result).toBeNull();
-       tick(1000);
-       expect(result).toBe('hello');
-
-       const start = new Date().getTime();
-       let dateDiff = 0;
-       interval(1000).pipe(take(2)).subscribe(() => dateDiff = (new Date().getTime() - start));
-
-       tick(1000);
-       expect(dateDiff).toBe(1000);
-       tick(1000);
-       expect(dateDiff).toBe(2000);
-     }));
-  // #enddocregion fake-async-test-rxjs
-
   // #docregion fake-async-test-clock
   describe('use jasmine.clock()', () => {
     // need to config __zone_symbol__fakeAsyncPatchLock flag
@@ -124,16 +141,4 @@ describe('Angular async helper', () => {
   });
   // #enddocregion async-test-promise-then
 
-  it('should run async test with successful delayed Observable', async(() => {
-       const source = of (true).pipe(delay(10));
-       source.subscribe(val => actuallyDone = true, err => fail(err));
-     }));
-
-  it('should run async test with successful delayed Observable', fakeAsync(() => {
-       const source = of (true).pipe(delay(10));
-       source.subscribe(val => actuallyDone = true, err => fail(err));
-
-       tick(10);
-     }));
-
 });