diff --git a/src/vs/workbench/node/extensionHostMain.ts b/src/vs/workbench/node/extensionHostMain.ts
index 36d33d6057177f1e46f4b0c90cdeb04ca9d02b3f..5a08660ab745fafecc8561da8deecb4fa8ae790e 100644
--- a/src/vs/workbench/node/extensionHostMain.ts
+++ b/src/vs/workbench/node/extensionHostMain.ts
@@ -276,7 +276,7 @@ export class ExtensionHostMain {
 
 		const timer = setTimeout(async () => {
 			await this._mainThreadWorkspace.$cancelSearch(requestId);
-			this._extensionService.activateById(extensionId, new ExtensionActivatedByEvent(true, `workspaceContainsTimeout`))
+			this._extensionService.activateById(extensionId, new ExtensionActivatedByEvent(true, `workspaceContainsTimeout:${globPatterns.join(',')}`))
 				.then(null, err => console.error(err));
 		}, ExtensionHostMain.WORKSPACE_CONTAINS_TIMEOUT);
 
diff --git a/src/vs/workbench/parts/extensions/electron-browser/runtimeExtensionsEditor.ts b/src/vs/workbench/parts/extensions/electron-browser/runtimeExtensionsEditor.ts
index 5d43bb9b58700bbe15d8e43c123b24f9e94040ed..470724893b10393e29f6df0da1fbc514f9e4cd75 100644
--- a/src/vs/workbench/parts/extensions/electron-browser/runtimeExtensionsEditor.ts
+++ b/src/vs/workbench/parts/extensions/electron-browser/runtimeExtensionsEditor.ts
@@ -318,6 +318,14 @@ export class RuntimeExtensionsEditor extends BaseEditor {
 							]
 						}, "Activated because file {0} exists in your workspace", fileNameOrGlob);
 					}
+				} else if (/^workspaceContainsTimeout:/.test(activationTimes.activationEvent)) {
+					const glob = activationTimes.activationEvent.substr('workspaceContainsTimeout:'.length);
+					title = nls.localize({
+						key: 'workspaceContainsTimeout',
+						comment: [
+							'{0} will be a glob pattern'
+						]
+					}, "Activated because searching for {0} took too long", glob);
 				} else if (/^onLanguage:/.test(activationTimes.activationEvent)) {
 					let language = activationTimes.activationEvent.substr('onLanguage:'.length);
 					title = nls.localize('languageActivation', "Activated because you opened a {0} file", language);