app/src/androidTest/kotlin/org/libremail/data/local/DatabaseEncryptionTest.kt

@@ -147,7 +147,7 @@ class DatabaseEncryptionTest {
         } finally {
             encrypted.close()
         }
-        assertEquals("Room's schema version must survive the plaintext -> encrypted conversion", 18, version)
+        assertEquals("Room's schema version must survive the plaintext -> encrypted conversion", 19, version)
     }
 
     private fun openPlaintext(): LibreMailDatabase =

app/src/androidTest/kotlin/org/libremail/data/local/MessageDaoTest.kt

@@ -76,6 +76,13 @@ class MessageDaoTest {
         inInbox = inInbox,
         bodyFetched = bodyFetched,
         uid = uid,
+        // Mirror production's Unicode-casefold population (issue #232): Mappers.toEntity + MessageDao's
+        // updateHeaderContent/updateBody write `lowercase()` copies of the searchable fields, and the
+        // *SearchSummaries queries match against these `*Fold` columns — so fixtures must set them too.
+        senderFold = sender.lowercase(),
+        senderEmailFold = senderEmail.lowercase(),
+        subjectFold = subject.lowercase(),
+        snippetFold = snippet.lowercase(),
     )
 
     /** Refreshes a [PagingSource] and returns the first loaded page's ids in order. */