diff --git a/packages/application-extension/src/index.ts b/packages/application-extension/src/index.ts
index 466d09535..00011f839 100644
--- a/packages/application-extension/src/index.ts
+++ b/packages/application-extension/src/index.ts
@@ -197,15 +197,15 @@ const opener: JupyterFrontEndPlugin<void> = {
 
         const file = decodeURIComponent(path);
         const ext = PathExt.extname(file);
+
+        // TODO: fix upstream?
+        await settingRegistry?.load('@jupyterlab/notebook-extension:panel');
+
         await new Promise(async () => {
           // TODO: get factory from file type instead?
           if (ext === '.ipynb') {
-            // TODO: fix upstream?
-            await settingRegistry?.load('@jupyterlab/notebook-extension:panel');
-            setTimeout(() => {
-              docManager.open(file, NOTEBOOK_FACTORY, undefined, {
-                ref: '_noref'
-              });
+            docManager.open(file, NOTEBOOK_FACTORY, undefined, {
+              ref: '_noref'
             });
           } else {
             docManager.open(file, EDITOR_FACTORY, undefined, {
diff --git a/ui-tests/test/general.spec.ts-snapshots/notebook-firefox-linux.png b/ui-tests/test/general.spec.ts-snapshots/notebook-firefox-linux.png
index d40340ac0..707971159 100644
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diff --git a/ui-tests/test/menus.spec.ts-snapshots/opened-menu-view-firefox-linux.png b/ui-tests/test/menus.spec.ts-snapshots/opened-menu-view-firefox-linux.png
index cfc60f6e5..9cb32711f 100644
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diff --git a/ui-tests/test/mobile.spec.ts-snapshots/notebook-chromium-linux.png b/ui-tests/test/mobile.spec.ts-snapshots/notebook-chromium-linux.png
index 4dd10c34c..3b05e5370 100644
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diff --git a/ui-tests/test/mobile.spec.ts-snapshots/notebook-firefox-linux.png b/ui-tests/test/mobile.spec.ts-snapshots/notebook-firefox-linux.png
index 250266320..6edc57d8c 100644
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diff --git a/ui-tests/test/mobile.spec.ts-snapshots/tree-chromium-linux.png b/ui-tests/test/mobile.spec.ts-snapshots/tree-chromium-linux.png
index 0ea79afbb..38244f82e 100644
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diff --git a/ui-tests/test/mobile.spec.ts-snapshots/tree-firefox-linux.png b/ui-tests/test/mobile.spec.ts-snapshots/tree-firefox-linux.png
index 017ff95b2..d7e8db695 100644
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