diff --git a/src/vs/workbench/parts/extensions/test/electron-browser/extensionsActions.test.ts b/src/vs/workbench/parts/extensions/test/electron-browser/extensionsActions.test.ts
index 68779a8ef72..8308b8fc640 100644
--- a/src/vs/workbench/parts/extensions/test/electron-browser/extensionsActions.test.ts
+++ b/src/vs/workbench/parts/extensions/test/electron-browser/extensionsActions.test.ts
@@ -74,8 +74,7 @@ suite('ExtensionsActions Test', () => {
 
 		instantiationService.stub(IExtensionEnablementService, new TestExtensionEnablementService(instantiationService));
 
-		instantiationService.stub(IExtensionTipsService, ExtensionTipsService);
-		instantiationService.stub(IExtensionTipsService, 'getKeymapRecommendations', () => []);
+		instantiationService.set(IExtensionTipsService, instantiationService.createInstance(ExtensionTipsService));
 		instantiationService.stub(IURLService, URLService);
 	});
 
diff --git a/src/vs/workbench/parts/extensions/test/electron-browser/extensionsTipsService.test.ts b/src/vs/workbench/parts/extensions/test/electron-browser/extensionsTipsService.test.ts
index 7f071a151aa..1aafa089302 100644
--- a/src/vs/workbench/parts/extensions/test/electron-browser/extensionsTipsService.test.ts
+++ b/src/vs/workbench/parts/extensions/test/electron-browser/extensionsTipsService.test.ts
@@ -38,9 +38,8 @@ import { assign } from 'vs/base/common/objects';
 import { getGalleryExtensionId } from 'vs/platform/extensionManagement/common/extensionManagementUtil';
 import { IEnvironmentService } from 'vs/platform/environment/common/environment';
 import { IStorageService, StorageScope } from 'vs/platform/storage/common/storage';
-import { IExtensionsWorkbenchService, ConfigurationKey } from 'vs/workbench/parts/extensions/common/extensions';
+import { ConfigurationKey } from 'vs/workbench/parts/extensions/common/extensions';
 import { ExtensionManagementService } from 'vs/platform/extensionManagement/node/extensionManagementService';
-import { ExtensionsWorkbenchService } from 'vs/workbench/parts/extensions/node/extensionsWorkbenchService';
 import { TestExtensionEnablementService } from 'vs/platform/extensionManagement/test/common/extensionEnablementService.test';
 import { IURLService } from 'vs/platform/url/common/url';
 import product from 'vs/platform/node/product';
@@ -167,7 +166,6 @@ function aGalleryExtension(name: string, properties: any = {}, galleryExtensionP
 suite('ExtensionsTipsService Test', () => {
 	let workspaceService: IWorkspaceContextService;
 	let instantiationService: TestInstantiationService;
-	let extensionsWorkbenchService: IExtensionsWorkbenchService;
 	let testConfigurationService: TestConfigurationService;
 	let testObject: ExtensionTipsService;
 	let parentResource: string;
@@ -222,8 +220,6 @@ suite('ExtensionsTipsService Test', () => {
 		instantiationService.stubPromise(IExtensionManagementService, 'getInstalled', []);
 		instantiationService.stub(IExtensionGalleryService, 'isEnabled', true);
 		instantiationService.stubPromise(IExtensionGalleryService, 'query', aPage<IGalleryExtension>(...mockExtensionGallery));
-		extensionsWorkbenchService = instantiationService.createInstance(ExtensionsWorkbenchService);
-		instantiationService.stub(IExtensionsWorkbenchService, extensionsWorkbenchService);
 
 		prompted = false;
 
@@ -246,7 +242,6 @@ suite('ExtensionsTipsService Test', () => {
 
 	teardown(done => {
 		(<ExtensionTipsService>testObject).dispose();
-		(<ExtensionsWorkbenchService>extensionsWorkbenchService).dispose();
 		if (parentResource) {
 			extfs.del(parentResource, os.tmpdir(), () => { }, done);
 		} else {
diff --git a/src/vs/workbench/parts/extensions/test/electron-browser/extensionsWorkbenchService.test.ts b/src/vs/workbench/parts/extensions/test/electron-browser/extensionsWorkbenchService.test.ts
index f1f0435cf31..2b3f43d0114 100644
--- a/src/vs/workbench/parts/extensions/test/electron-browser/extensionsWorkbenchService.test.ts
+++ b/src/vs/workbench/parts/extensions/test/electron-browser/extensionsWorkbenchService.test.ts
@@ -76,8 +76,7 @@ suite('ExtensionsWorkbenchService Test', () => {
 
 		instantiationService.stub(IExtensionEnablementService, new TestExtensionEnablementService(instantiationService));
 
-		instantiationService.stub(IExtensionTipsService, ExtensionTipsService);
-		instantiationService.stub(IExtensionTipsService, 'getKeymapRecommendations', () => []);
+		instantiationService.set(IExtensionTipsService, instantiationService.createInstance(ExtensionTipsService));
 
 		instantiationService.stub(INotificationService, { prompt: () => null });
 		instantiationService.stub(IDialogService, { show: () => TPromise.as(0) });