diff --git a/deltachat-rpc-client/tests/test_folders.py b/deltachat-rpc-client/tests/test_folders.py
index 3b917d6a3..132dfb617 100644
--- a/deltachat-rpc-client/tests/test_folders.py
+++ b/deltachat-rpc-client/tests/test_folders.py
@@ -17,7 +17,6 @@ def test_moved_markseen(acfactory, direct_imap, log):
     log.section("ac2: creating DeltaChat folder")
     ac2_direct_imap = direct_imap(ac2)
     ac2_direct_imap.create_folder("DeltaChat")
-    # ac2.set_config("delete_server_after", "0")  # TODO check if this causes a test failure
     ac2.set_config("sync_msgs", "0")  # Do not send a sync message when accepting a contact request.
 
     ac2.add_or_update_transport({"addr": addr, "password": password, "imapFolder": "DeltaChat"})
@@ -57,11 +56,6 @@ def test_moved_markseen(acfactory, direct_imap, log):
 def test_markseen_message_and_mdn(acfactory, direct_imap):
     ac1, ac2 = acfactory.get_online_accounts(2)
 
-    for ac in ac1, ac2:
-        # TODO check if this causes a test failure
-        # ac.set_config("delete_server_after", "0")
-        pass
-
     # Do not send BCC to self, we only want to test MDN on ac1.
     ac1.set_config("bcc_self", "0")
 
diff --git a/src/ephemeral.rs b/src/ephemeral.rs
index 5ab5483af..35b6bafbe 100644
--- a/src/ephemeral.rs
+++ b/src/ephemeral.rs
@@ -648,7 +648,6 @@ pub(crate) async fn ephemeral_loop(context: &Context, interrupt_receiver: Receiv
 }
 
 /// Schedules expired IMAP messages for deletion.
-#[expect(clippy::arithmetic_side_effects)]
 pub(crate) async fn delete_expired_imap_messages(context: &Context) -> Result<()> {
     let now = time();
     context
diff --git a/src/imap.rs b/src/imap.rs
index 07272ae40..41a18a881 100644
--- a/src/imap.rs
+++ b/src/imap.rs
@@ -1395,7 +1395,7 @@ impl Session {
                     context
                         .sql
                         .execute(
-                            &format!("UPDATE imap SET target='' WHERE rfc724_mid=?"),
+                            "UPDATE imap SET target='' WHERE rfc724_mid=?",
                             (rfc724_mid,),
                         )
                         .await?;