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 405be3a135fd69a8da30df06d8965fa2861d08d0..17f180eedc120a8e44f2ab8b03db186a6c6644c2 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
@@ -53,7 +53,7 @@ suite('ExtensionsActions Test', () => {
 		instantiationService.stub(ITelemetryService, NullTelemetryService);
 
 		instantiationService.stub(IWorkspaceContextService, new TestContextService());
-		instantiationService.stub(IConfigurationService, { onDidUpdateConfiguration: () => { }, getConfiguration: () => ({}) });
+		instantiationService.stub(IConfigurationService, { onDidUpdateConfiguration: () => { }, onDidChangeConfiguration: () => { }, getConfiguration: () => ({}) });
 
 		instantiationService.stub(IExtensionGalleryService, ExtensionGalleryService);
 
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 3cfe083cd1690ab696f99299e1b9c354f4076668..2fad5c275f03da4e5b5089711ad510c467269762 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
@@ -56,7 +56,7 @@ suite('ExtensionsWorkbenchService Test', () => {
 		instantiationService.stub(IExtensionGalleryService, ExtensionGalleryService);
 
 		instantiationService.stub(IWorkspaceContextService, new TestContextService());
-		instantiationService.stub(IConfigurationService, { onDidUpdateConfiguration: () => { }, getConfiguration: () => ({}) });
+		instantiationService.stub(IConfigurationService, { onDidUpdateConfiguration: () => { }, onDidChangeConfiguration: () => { }, getConfiguration: () => ({}) });
 
 		instantiationService.stub(IExtensionManagementService, ExtensionManagementService);
 		instantiationService.stub(IExtensionManagementService, 'onInstallExtension', installEvent.event);
diff --git a/src/vs/workbench/services/keybinding/test/node/keybindingEditing.test.ts b/src/vs/workbench/services/keybinding/test/node/keybindingEditing.test.ts
index 9ee62bfdc44b103694206f1b90013f9b5dc1ae5b..6f003bde4916a6dfc89e3ae0d1f4157717502019 100644
--- a/src/vs/workbench/services/keybinding/test/node/keybindingEditing.test.ts
+++ b/src/vs/workbench/services/keybinding/test/node/keybindingEditing.test.ts
@@ -67,6 +67,7 @@ suite('Keybindings Editing', () => {
 			instantiationService.stub(IConfigurationService, ConfigurationService);
 			instantiationService.stub(IConfigurationService, 'getConfiguration', { 'eol': '\n' });
 			instantiationService.stub(IConfigurationService, 'onDidUpdateConfiguration', () => { });
+			instantiationService.stub(IConfigurationService, 'onDidChangeConfiguration', () => { });
 			instantiationService.stub(IWorkspaceContextService, new TestContextService());
 			instantiationService.stub(ILifecycleService, new TestLifecycleService());
 			instantiationService.stub(IEditorGroupService, new TestEditorGroupService());
diff --git a/src/vs/workbench/test/electron-browser/api/mainThreadConfiguration.test.ts b/src/vs/workbench/test/electron-browser/api/mainThreadConfiguration.test.ts
index 5cd09140d48caae732bf641a7cbeac7240b3e452..b91637eeeaec26184c50431e801e004f407abd68 100644
--- a/src/vs/workbench/test/electron-browser/api/mainThreadConfiguration.test.ts
+++ b/src/vs/workbench/test/electron-browser/api/mainThreadConfiguration.test.ts
@@ -50,6 +50,7 @@ suite('MainThreadConfiguration', function () {
 		instantiationService = new TestInstantiationService();
 		instantiationService.stub(IConfigurationService, WorkspaceService);
 		instantiationService.stub(IConfigurationService, 'onDidUpdateConfiguration', sinon.mock());
+		instantiationService.stub(IConfigurationService, 'onDidChangeConfiguration', sinon.mock());
 		instantiationService.stub(IConfigurationService, 'updateValue', target);
 	});