diff --git a/tests/e2e/test_atomic_artifact_search_http.py b/tests/e2e/test_atomic_artifact_search_http.py
index f935fbdf11..d79151c264 100644
--- a/tests/e2e/test_atomic_artifact_search_http.py
+++ b/tests/e2e/test_atomic_artifact_search_http.py
@@ -100,7 +100,8 @@ async def scenario():
             mcp=McpConfig(enabled=False),
         )
         embedding = _Embedding()
-        prepare_server_database(
+        await asyncio.to_thread(
+            prepare_server_database,
             settings,
             evidence_dir=migration_backend.directory / "migration-evidence",
             embedding_profile=embedding.profile,