diff --git a/tests/unit/test_db_update_conversation.py b/tests/unit/test_db_update_conversation.py
new file mode 100644
index 000000000..42ee46e35
--- /dev/null
+++ b/tests/unit/test_db_update_conversation.py
@@ -0,0 +1,44 @@
+"""Test that update_conversation accepts clear_persona parameter.
+
+BaseDatabase declares ``clear_persona: bool = False``, but SQLiteDatabase
+was missing the parameter, causing ``TypeError`` when callers passed it.
+"""
+
+import pytest
+
+
+def test_sqlite_update_conversation_accepts_clear_persona():
+    """Verify SQLiteDatabase.update_conversation accepts all abstract params."""
+    from inspect import signature
+    from astrbot.core.db import BaseDatabase
+    from astrbot.core.db.sqlite import SQLiteDatabase
+
+    sig = signature(BaseDatabase.update_conversation)
+    impl_sig = signature(SQLiteDatabase.update_conversation)
+
+    for name, param in sig.parameters.items():
+        assert name in impl_sig.parameters, (
+            f"SQLiteDatabase.update_conversation missing parameter: {name}"
+        )
+
+
+@pytest.mark.asyncio
+async def test_update_conversation_clear_persona_does_not_crash():
+    """Call update_conversation with clear_persona=True does not raise."""
+    from astrbot.core.db.sqlite import SQLiteDatabase
+
+    db = SQLiteDatabase(":memory:")
+    await db.initialize()
+
+    try:
+        result = await db.update_conversation(
+            cid="test-cid",
+            title="test",
+            clear_persona=True,
+        )
+        # No conversation exists, so result should be None
+        assert result is None
+    except TypeError as e:
+        pytest.fail(f"update_conversation(clear_persona=True) raised: {e}")
+    finally:
+        await db.engine.dispose()