diff --git a/api/tests/conftest.py b/api/tests/conftest.py
index 208acdd..7880a8b 100644
--- a/api/tests/conftest.py
+++ b/api/tests/conftest.py
@@ -356,7 +356,7 @@ def _get_number_of_posts(
         start: Union[TwitterTimestamp, None] = None,
         end: Union[TwitterTimestamp, None] = None,
         search_text: Union[str, None] = None,
-        search_url: Union[str, None] = None,
+        search_url: Union[HttpUrl, None] = None,
     ) -> int:
         return len(list(_get_posts(post_ids, note_ids, start, end, search_text, search_url)))