diff --git a/web/src/features/social/skill-reviews.test.tsx b/web/src/features/social/skill-reviews.test.tsx
index 9af2ba6a..de3710e4 100644
--- a/web/src/features/social/skill-reviews.test.tsx
+++ b/web/src/features/social/skill-reviews.test.tsx
@@ -148,6 +148,7 @@ describe('skill reviews', () => {
     expect(ru.skillReviews.count_one).toBeTruthy()
     expect(ru.skillReviews.count_few).toBeTruthy()
     expect(ru.skillReviews.count_many).toBeTruthy()
+    expect(ru.skillReviews.count_other).toBeTruthy()
   })
 
   it('lets an authenticated author clear existing text when the skill is not interactable', () => {
diff --git a/web/src/i18n/ru-locale.test.ts b/web/src/i18n/ru-locale.test.ts
index 11993275..83d33479 100644
--- a/web/src/i18n/ru-locale.test.ts
+++ b/web/src/i18n/ru-locale.test.ts
@@ -42,7 +42,10 @@ describe('russian locale', () => {
       for (const part of parts) {
         cursor = (cursor as Record<string, unknown>)[part]
       }
-      const englishReference = enMap[key] ?? enMap[key.replace(pluralSuffix, '_other')] ?? ''
+      const englishReference = enMap[key] ?? enMap[key.replace(pluralSuffix, '_other')]
+      if (englishReference === undefined) {
+        throw new Error(`missing English reference for ${key}`)
+      }
       if (placeholders(String(cursor)).join() !== placeholders(englishReference).join()) {
         mismatches.push(key)
       }