diff --git a/src/crawlee/storage_clients/_base/_request_queue_client.py b/src/crawlee/storage_clients/_base/_request_queue_client.py
index 4a09c81f21..768733f2da 100644
--- a/src/crawlee/storage_clients/_base/_request_queue_client.py
+++ b/src/crawlee/storage_clients/_base/_request_queue_client.py
@@ -125,20 +125,12 @@ async def is_empty(self) -> bool:
             True if the request queue is empty, False otherwise.
         """
 
+    @abstractmethod
     async def is_finished(self) -> bool:
         """Check if the request queue is finished.
 
         A finished queue is empty and has no requests currently being processed.
 
-        Warning:
-            This default only checks `is_empty`, which reports whether requests are available to fetch, not
-            whether requests are still being processed. It can therefore return `True` while requests are in
-            progress. Subclasses that track in-progress requests should override this method; all built-in
-            clients already do.
-
         Returns:
             True if the request queue is finished, False otherwise.
         """
-        # TODO: Make this method abstract.
-        # https://github.com/apify/crawlee-python/issues/1985
-        return await self.is_empty()