diff --git a/test/web/feed/tag_controller_test.exs b/test/web/feed/tag_controller_test.exs
index d95aac108..d726300a9 100644
--- a/test/web/feed/tag_controller_test.exs
+++ b/test/web/feed/tag_controller_test.exs
@@ -82,6 +82,10 @@ test "gets a feed (ATOM)", %{conn: conn} do
   end
 
   test "gets a feed (RSS)", %{conn: conn} do
+    %{microsecond: {micro, _}} = DateTime.utc_now()
+    micro = (micro / 1000) |> floor()
+    Process.sleep(950 - micro)
+
     Pleroma.Config.put(
       [:feed, :post_title],
       %{max_length: 25, omission: "..."}