diff --git a/src/vs/platform/configuration/common/configurationRegistry.ts b/src/vs/platform/configuration/common/configurationRegistry.ts
index 518898d9d85..34b7a40b1c3 100644
--- a/src/vs/platform/configuration/common/configurationRegistry.ts
+++ b/src/vs/platform/configuration/common/configurationRegistry.ts
@@ -336,7 +336,13 @@ export function validateProperty(property: string): string {
 	return null;
 }
 
-export function getScopes(keys: string[]): ConfigurationScope[] {
+export function getScopes(): { [key: string]: ConfigurationScope } {
+	const scopes = {};
 	const configurationProperties = configurationRegistry.getConfigurationProperties();
-	return keys.map(key => configurationProperties[key].scope);
+	for (const key of Object.keys(configurationProperties)) {
+		scopes[key] = configurationProperties[key].scope;
+	}
+	scopes['launch'] = ConfigurationScope.RESOURCE;
+	scopes['task'] = ConfigurationScope.RESOURCE;
+	return scopes;
 }
diff --git a/src/vs/workbench/api/node/extHost.protocol.ts b/src/vs/workbench/api/node/extHost.protocol.ts
index 07a6fc237ad..3a62eda7a27 100644
--- a/src/vs/workbench/api/node/extHost.protocol.ts
+++ b/src/vs/workbench/api/node/extHost.protocol.ts
@@ -83,7 +83,7 @@ export interface IInitData {
 }
 
 export interface IConfigurationInitData extends IConfigurationData {
-	configurationScopes: ConfigurationScope[];
+	configurationScopes: { [key: string]: ConfigurationScope };
 }
 
 export interface IWorkspaceConfigurationChangeEventData {
diff --git a/src/vs/workbench/api/node/extHostConfiguration.ts b/src/vs/workbench/api/node/extHostConfiguration.ts
index db1ab8b650f..e89decf0b5b 100644
--- a/src/vs/workbench/api/node/extHostConfiguration.ts
+++ b/src/vs/workbench/api/node/extHostConfiguration.ts
@@ -41,14 +41,14 @@ export class ExtHostConfiguration implements ExtHostConfigurationShape {
 	private readonly _onDidChangeConfiguration = new Emitter<vscode.ConfigurationChangeEvent>();
 	private readonly _proxy: MainThreadConfigurationShape;
 	private readonly _extHostWorkspace: ExtHostWorkspace;
-	private _configurationScopes: Map<string, ConfigurationScope>;
+	private _configurationScopes: { [key: string]: ConfigurationScope };
 	private _configuration: Configuration;
 
 	constructor(proxy: MainThreadConfigurationShape, extHostWorkspace: ExtHostWorkspace, data: IConfigurationInitData) {
 		this._proxy = proxy;
 		this._extHostWorkspace = extHostWorkspace;
 		this._configuration = Configuration.parse(data);
-		this._readConfigurationScopes(data.configurationScopes);
+		this._configurationScopes = data.configurationScopes;
 	}
 
 	get onDidChangeConfiguration(): Event<vscode.ConfigurationChangeEvent> {
@@ -129,7 +129,7 @@ export class ExtHostConfiguration implements ExtHostConfigurationShape {
 	}
 
 	private _validateConfigurationAccess(key: string, resource: URI, extensionId: string): void {
-		const scope = this._configurationScopes.get(key);
+		const scope = this._configurationScopes[key];
 		const extensionIdText = extensionId ? `[${extensionId}] ` : '';
 		if (ConfigurationScope.RESOURCE === scope) {
 			if (resource === void 0) {
@@ -145,18 +145,6 @@ export class ExtHostConfiguration implements ExtHostConfigurationShape {
 		}
 	}
 
-	private _readConfigurationScopes(scopes: ConfigurationScope[]): void {
-		this._configurationScopes = new Map<string, ConfigurationScope>();
-		if (scopes.length) {
-			const defaultKeys = this._configuration.keys(this._extHostWorkspace.workspace).default;
-			if (defaultKeys.length === scopes.length) {
-				for (let i = 0; i < defaultKeys.length; i++) {
-					this._configurationScopes.set(defaultKeys[i], scopes[i]);
-				}
-			}
-		}
-	}
-
 	private _toConfigurationChangeEvent(data: IWorkspaceConfigurationChangeEventData): vscode.ConfigurationChangeEvent {
 		const changedConfiguration = new ConfigurationModel(data.changedConfiguration.contents, data.changedConfiguration.keys, data.changedConfiguration.overrides);
 		const changedConfigurationByResource: StrictResourceMap<ConfigurationModel> = new StrictResourceMap<ConfigurationModel>();
diff --git a/src/vs/workbench/services/extensions/electron-browser/extensionHost.ts b/src/vs/workbench/services/extensions/electron-browser/extensionHost.ts
index 8079fd1e198..a02b5cf7211 100644
--- a/src/vs/workbench/services/extensions/electron-browser/extensionHost.ts
+++ b/src/vs/workbench/services/extensions/electron-browser/extensionHost.ts
@@ -358,7 +358,7 @@ export class ExtensionHostProcessWorker {
 
 	private _createExtHostInitData(): TPromise<IInitData> {
 		return TPromise.join<any>([this._telemetryService.getTelemetryInfo(), this._extensionService.getExtensions()]).then(([telemetryInfo, extensionDescriptions]) => {
-			const configurationData: IConfigurationInitData = { ...this._configurationService.getConfigurationData(), configurationScopes: [] };
+			const configurationData: IConfigurationInitData = { ...this._configurationService.getConfigurationData(), configurationScopes: {} };
 			const r: IInitData = {
 				parentPid: process.pid,
 				environment: {
@@ -376,7 +376,7 @@ export class ExtensionHostProcessWorker {
 				workspace: this._contextService.getWorkbenchState() === WorkbenchState.EMPTY ? null : <IWorkspaceData>this._contextService.getWorkspace(),
 				extensions: extensionDescriptions,
 				// Send configurations scopes only in development mode.
-				configuration: !this._environmentService.isBuilt || this._environmentService.isExtensionDevelopment ? { ...configurationData, configurationScopes: getScopes(this._configurationService.keys().default) } : configurationData,
+				configuration: !this._environmentService.isBuilt || this._environmentService.isExtensionDevelopment ? { ...configurationData, configurationScopes: getScopes() } : configurationData,
 				telemetryInfo,
 				args: this._environmentService.args,
 				execPath: this._environmentService.execPath,