diff --git a/web/app.js b/web/app.js
index dc080e7ca..2af3a511e 100644
--- a/web/app.js
+++ b/web/app.js
@@ -1479,13 +1479,7 @@ const PDFViewerApplication = {
       // It should be *extremely* rare for metadata to not have been resolved
       // when this code runs, but ensure that we handle that case here.
       await new Promise(resolve => {
-        this.eventBus._on(
-          "metadataloaded",
-          evt => {
-            resolve();
-          },
-          { once: true }
-        );
+        this.eventBus._on("metadataloaded", resolve, { once: true });
       });
       if (pdfDocument !== this.pdfDocument) {
         return; // The document was closed while the metadata resolved.
@@ -1498,13 +1492,7 @@ const PDFViewerApplication = {
       // Hence we'll simply have to trust that the `contentLength` (as provided
       // by the server), when it exists, is accurate enough here.
       await new Promise(resolve => {
-        this.eventBus._on(
-          "documentloaded",
-          evt => {
-            resolve();
-          },
-          { once: true }
-        );
+        this.eventBus._on("documentloaded", resolve, { once: true });
       });
       if (pdfDocument !== this.pdfDocument) {
         return; // The document was closed while the downloadInfo resolved.