diff --git a/app/src/test/java/space/hackenslacker/kanbn4droid/app/boarddetail/BoardDetailRepositoryTest.kt b/app/src/test/java/space/hackenslacker/kanbn4droid/app/boarddetail/BoardDetailRepositoryTest.kt
index 350bd37..f375578 100644
--- a/app/src/test/java/space/hackenslacker/kanbn4droid/app/boarddetail/BoardDetailRepositoryTest.kt
+++ b/app/src/test/java/space/hackenslacker/kanbn4droid/app/boarddetail/BoardDetailRepositoryTest.kt
@@ -215,13 +215,34 @@ class BoardDetailRepositoryTest {
         val result = repository.createCard(
             listId = " list-1 ",
             title = " Card title ",
-            description = "Description",
-            dueDate = null,
-            tagIds = listOf(" tag-1 ", "", "tag-2"),
+            description = "  Description  ",
+            dueDate = "2026-03-16T10:15:30Z",
+            tagIds = listOf(" tag-1 ", "", "tag-2", "tag-1", "   ", " tag-2"),
         )
 
         assertTrue(result is BoardsApiResult.Success<*>)
         assertEquals("list-1", apiClient.lastCreateCardListPublicId)
+        assertEquals("Card title", apiClient.lastCreateCardTitle)
+        assertEquals("Description", apiClient.lastCreateCardDescription)
+        assertEquals("2026-03-16T10:15:30Z", apiClient.lastCreateCardDueDate)
+        assertEquals(listOf("tag-1", "tag-2"), apiClient.lastCreateCardTagPublicIds)
+    }
+
+    @Test
+    fun createCard_sendsNullDescriptionWhenBlankAfterTrim() = runTest {
+        val apiClient = FakeBoardDetailApiClient()
+        val repository = createRepository(apiClient = apiClient)
+
+        val result = repository.createCard(
+            listId = "list-1",
+            title = "Card",
+            description = "   ",
+            dueDate = null,
+            tagIds = emptyList(),
+        )
+
+        assertTrue(result is BoardsApiResult.Success<*>)
+        assertEquals(null, apiClient.lastCreateCardDescription)
     }
 
     @Test
@@ -486,6 +507,10 @@ class BoardDetailRepositoryTest {
         var lastMoveTargetListId: String? = null
         var getLabelByPublicIdCalls: MutableList<String> = mutableListOf()
         var lastCreateCardListPublicId: String? = null
+        var lastCreateCardTitle: String? = null
+        var lastCreateCardDescription: String? = null
+        var lastCreateCardDueDate: String? = null
+        var lastCreateCardTagPublicIds: List<String> = emptyList()
 
         override suspend fun healthCheck(baseUrl: String, apiKey: String): AuthResult = AuthResult.Success
 
@@ -537,6 +562,10 @@ class BoardDetailRepositoryTest {
             tagPublicIds: List<String>,
         ): BoardsApiResult<CreatedEntityRef> {
             lastCreateCardListPublicId = listPublicId
+            lastCreateCardTitle = title
+            lastCreateCardDescription = description
+            lastCreateCardDueDate = dueDate
+            lastCreateCardTagPublicIds = tagPublicIds
             return createCardResult
         }