diff --git a/shell/browser/api/electron_api_app.cc b/shell/browser/api/electron_api_app.cc
index 73db1e756f885..3bdbf30ee8f15 100644
--- a/shell/browser/api/electron_api_app.cc
+++ b/shell/browser/api/electron_api_app.cc
@@ -1148,6 +1148,8 @@ bool App::RequestSingleInstanceLock(gin::Arguments* args) {
 
   base::FilePath user_dir;
   base::PathService::Get(chrome::DIR_USER_DATA, &user_dir);
+  // The user_dir may have not been created yet.
+  base::CreateDirectoryAndGetError(user_dir, nullptr);
 
   auto cb = base::BindRepeating(&App::OnSecondInstance, base::Unretained(this));
   auto wrapped_cb = base::BindRepeating(NotificationCallbackWrapper, cb);
diff --git a/spec-main/api-app-spec.ts b/spec-main/api-app-spec.ts
index 98b7b8ac2778f..0389b70931a07 100644
--- a/spec-main/api-app-spec.ts
+++ b/spec-main/api-app-spec.ts
@@ -228,7 +228,7 @@ describe('app module', () => {
       expect(code1).to.equal(0);
     });
 
-    it.only('returns true when setting non-existent user data folder', async function () {
+    it('returns true when setting non-existent user data folder', async function () {
       const appPath = path.join(fixturesPath, 'api', 'singleton-userdata');
       const instance = cp.spawn(process.execPath, [appPath]);
       const [code] = await emittedOnce(instance, 'exit');