lib/pleroma/web/activity_pub/activity_pub.ex

@@ -1827,7 +1827,7 @@ def fetch_and_prepare_featured_from_ap_id(ap_id) do
   def enqueue_pin_fetches(%{pinned_objects: pins}) do
     # enqueue a task to fetch all pinned objects
     Enum.each(pins, fn {ap_id, _} ->
-      unless %{} = Object.get_cached_by_ap_id(ap_id) do
+      if is_nil(Object.get_cached_by_ap_id(ap_id)) do
         Pleroma.Workers.RemoteFetcherWorker.enqueue("fetch_remote", %{
           "id" => ap_id,
           "depth" => 1

test/pleroma/web/activity_pub/activity_pub_test.exs

@@ -325,9 +325,7 @@ test "fetches user featured collection" do
             body: featured_data,
             headers: [{"content-type", "application/activity+json"}]
           }
-      end)
 
-      Tesla.Mock.mock_global(fn
         %{
           method: :get,
           url: ^object_url
@@ -340,7 +338,8 @@ test "fetches user featured collection" do
       end)
 
       {:ok, user} = ActivityPub.make_user_from_ap_id(ap_id)
-      Process.sleep(50)
+      # wait for oban
+      Pleroma.Tests.ObanHelpers.perform_all()
 
       assert user.featured_address == featured_url
       assert Map.has_key?(user.pinned_objects, object_url)