diff --git a/src/utils/__tests__/currentLanguage.test.js b/src/utils/__tests__/currentLanguage.test.js
index 71b5f49..fa12a2d 100644
--- a/src/utils/__tests__/currentLanguage.test.js
+++ b/src/utils/__tests__/currentLanguage.test.js
@@ -39,4 +39,8 @@ test.for([
     ['de-DE-u-co-phonebk', 'de'],
     ['zh-Hant-TW-u-co-phonebk', 'zh']
 ])('returns the language \'%s\'', ([locale, language]) => {
+    Object.defineProperty(navigator, 'language', {
+        value: language,
+        configurable: true
+    });
 });
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