diff --git a/src/vs/workbench/api/node/extHost.api.impl.ts b/src/vs/workbench/api/node/extHost.api.impl.ts
index 025c03ce4effa16829b160897ef4ab85729b79a3..07e96c7fd1d36bf1993a9706b014ceb914749dcf 100644
--- a/src/vs/workbench/api/node/extHost.api.impl.ts
+++ b/src/vs/workbench/api/node/extHost.api.impl.ts
@@ -882,7 +882,7 @@ interface INodeModuleFactory {
 	load(request: string, parent: { filename: string; }): any;
 }
 
-class NodeModuleRequireInterceptor {
+export class NodeModuleRequireInterceptor {
 	public static INSTANCE = new NodeModuleRequireInterceptor();
 
 	private readonly _factories: Map<string, INodeModuleFactory>;
@@ -908,13 +908,7 @@ class NodeModuleRequireInterceptor {
 	}
 }
 
-export function initializeExtensionApi(extensionService: ExtHostExtensionService, apiFactory: IExtensionApiFactory, extensionRegistry: ExtensionDescriptionRegistry, configProvider: ExtHostConfigProvider): Promise<void> {
-	return extensionService.getExtensionPathIndex().then(extensionPaths => {
-		NodeModuleRequireInterceptor.INSTANCE.register(new VSCodeNodeModuleFactory(apiFactory, extensionPaths, extensionRegistry, configProvider));
-	});
-}
-
-class VSCodeNodeModuleFactory implements INodeModuleFactory {
+export class VSCodeNodeModuleFactory implements INodeModuleFactory {
 	public readonly nodeModuleName = 'vscode';
 
 	private readonly _extApiImpl = new Map<string, typeof vscode>();
diff --git a/src/vs/workbench/api/node/extHostExtensionService.ts b/src/vs/workbench/api/node/extHostExtensionService.ts
index b0a9421c1fa171056c12bf195b9939a9cee070af..9c5a7259524e36f8c8a3258ed563a5da63bc304c 100644
--- a/src/vs/workbench/api/node/extHostExtensionService.ts
+++ b/src/vs/workbench/api/node/extHostExtensionService.ts
@@ -12,7 +12,7 @@ import { TernarySearchTree } from 'vs/base/common/map';
 import { URI } from 'vs/base/common/uri';
 import * as pfs from 'vs/base/node/pfs';
 import { ILogService } from 'vs/platform/log/common/log';
-import { createApiFactory, initializeExtensionApi, IExtensionApiFactory } from 'vs/workbench/api/node/extHost.api.impl';
+import { createApiFactory, IExtensionApiFactory, NodeModuleRequireInterceptor, VSCodeNodeModuleFactory } from 'vs/workbench/api/node/extHost.api.impl';
 import { ExtHostExtensionServiceShape, IEnvironment, IInitData, IMainContext, MainContext, MainThreadExtensionServiceShape, MainThreadTelemetryShape, MainThreadWorkspaceShape, IStaticWorkspaceData } from 'vs/workbench/api/common/extHost.protocol';
 import { ExtHostConfiguration } from 'vs/workbench/api/node/extHostConfiguration';
 import { ActivatedExtension, EmptyExtension, ExtensionActivatedByAPI, ExtensionActivatedByEvent, ExtensionActivationReason, ExtensionActivationTimes, ExtensionActivationTimesBuilder, ExtensionsActivator, IExtensionAPI, IExtensionContext, IExtensionMemento, IExtensionModule, HostExtension } from 'vs/workbench/api/node/extHostExtensionActivator';
@@ -242,7 +242,9 @@ export class ExtHostExtensionService implements ExtHostExtensionServiceShape {
 	private async _initialize(): Promise<void> {
 		try {
 			const configProvider = await this._extHostConfiguration.getConfigProvider();
-			await initializeExtensionApi(this, this._extensionApiFactory, this._registry, configProvider);
+			const extensionPaths = await this.getExtensionPathIndex();
+			NodeModuleRequireInterceptor.INSTANCE.register(new VSCodeNodeModuleFactory(this._extensionApiFactory, extensionPaths, this._registry, configProvider));
+
 			// Do this when extension service exists, but extensions are not being activated yet.
 			await connectProxyResolver(this._extHostWorkspace, configProvider, this, this._extHostLogService, this._mainThreadTelemetryProxy);
 			this._almostReadyToRunExtensions.open();