diff --git a/ts/reviewer/index.ts b/ts/reviewer/index.ts
index abb96a661..88ab8f3e0 100644
--- a/ts/reviewer/index.ts
+++ b/ts/reviewer/index.ts
@@ -1,6 +1,10 @@
 // Copyright: Ankitects Pty Ltd and contributors
 // License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
+/* eslint
+@typescript-eslint/no-non-null-assertion: "off",
+ */
+
 import "css-browser-selector/css_browser_selector";
 import "jquery/dist/jquery";
 
@@ -139,7 +143,7 @@ export function _showAnswer(a: string, bodyclass: string): void {
                 // avoid scrolling to the answer until images load
                 allImagesLoaded().then(scrollToAnswer);
             },
-            function () {}
+            function () {/* noop */}
         )
     );
 }
diff --git a/ts/reviewer/mathjax.ts b/ts/reviewer/mathjax.ts
index f7f7546b6..7fcbcfcbf 100644
--- a/ts/reviewer/mathjax.ts
+++ b/ts/reviewer/mathjax.ts
@@ -7,7 +7,8 @@ import { RegisterHTMLHandler } from "mathjax-full/js/handlers/html";
 import { AllPackages } from "mathjax-full/js/input/tex/AllPackages.js";
 import "mathjax-full/js/util/entities/all";
 
-const adaptor = new HTMLAdaptor(window as any);
+// @ts-expect-error Minor interface mismatch: document.documentElement.nodeValue might be null
+const adaptor = new HTMLAdaptor(window);
 RegisterHTMLHandler(adaptor);
 
 const texOptions = {