diff --git a/aio/src/app/sw-updates/global.value.spec.ts b/aio/src/app/sw-updates/global.value.spec.ts
new file mode 100644
index 0000000000..ff43fd55ef
--- /dev/null
+++ b/aio/src/app/sw-updates/global.value.spec.ts
@@ -0,0 +1,18 @@
+import { ReflectiveInjector } from '@angular/core';
+
+import { Global, globalProvider } from './global.value';
+
+
+describe('Global', () => {
+  let value: any;
+
+  beforeEach(() => {
+    const injector = ReflectiveInjector.resolveAndCreate([globalProvider]);
+    value = injector.get(Global);
+  });
+
+
+  it('should be `window`', () => {
+    expect(value).toBe(window);
+  });
+});
diff --git a/aio/src/app/sw-updates/global.value.ts b/aio/src/app/sw-updates/global.value.ts
index 58ff6b2562..91d1fe04a1 100644
--- a/aio/src/app/sw-updates/global.value.ts
+++ b/aio/src/app/sw-updates/global.value.ts
@@ -2,4 +2,7 @@ import { InjectionToken } from '@angular/core';
 
 
 export const Global = new InjectionToken<Window>('global');
-export const globalProvider = { provide: Global, useValue: window };
+export const globalProvider = { provide: Global, useFactory: globalFactory };
+export function globalFactory() {
+  return window;
+}