diff --git a/types/i18next-browser-languagedetector/i18next-browser-languagedetector-tests.ts b/types/i18next-browser-languagedetector/i18next-browser-languagedetector-tests.ts
index 174a871b9f..eadfcea369 100644
--- a/types/i18next-browser-languagedetector/i18next-browser-languagedetector-tests.ts
+++ b/types/i18next-browser-languagedetector/i18next-browser-languagedetector-tests.ts
@@ -19,7 +19,7 @@ const options: LngDetector.DetectorOptions = {
     cookieDomain: "myDomain",
 
     // optional htmlTag with lang attribute, the default is:
-    htmlTag: document.documentElement!
+    htmlTag: document.documentElement
 };
 
 i18next.use(LngDetector).init({