diff --git a/node/subsystem-util/src/rolling_session_window.rs b/node/subsystem-util/src/rolling_session_window.rs
index d8a908a6901c..608ae420b0b5 100644
--- a/node/subsystem-util/src/rolling_session_window.rs
+++ b/node/subsystem-util/src/rolling_session_window.rs
@@ -281,6 +281,7 @@ mod tests {
 	use assert_matches::assert_matches;
 	use polkadot_node_subsystem::messages::{AllMessages, AvailabilityRecoveryMessage};
 	use polkadot_node_subsystem_test_helpers::make_subsystem_context;
+	use polkadot_node_subsystem::SubsystemContext;
 	use polkadot_primitives::v2::Header;
 	use sp_core::testing::TaskExecutor;
 
@@ -329,11 +330,11 @@ mod tests {
 		let test_fut = {
 			Box::pin(async move {
 				let window = match window {
-					None => RollingSessionWindow::new(&mut sender, TEST_WINDOW_SIZE, hash)
+					None => RollingSessionWindow::new(sender.clone(), TEST_WINDOW_SIZE, hash)
 						.await
 						.unwrap(),
 					Some(mut window) => {
-						window.cache_session_info_for_head(&mut sender, hash).await.unwrap();
+						window.cache_session_info_for_head(sender, hash).await.unwrap();
 						window
 					},
 				};
@@ -503,8 +504,9 @@ mod tests {
 		let hash = header.hash();
 
 		let test_fut = {
+			let sender = ctx.sender().clone();
 			Box::pin(async move {
-				let res = RollingSessionWindow::new(ctx.sender(), TEST_WINDOW_SIZE, hash).await;
+				let res = RollingSessionWindow::new(sender, TEST_WINDOW_SIZE, hash).await;
 				assert!(res.is_err());
 			})
 		};
@@ -563,8 +565,9 @@ mod tests {
 
 		let test_fut = {
 			Box::pin(async move {
+				let sender = ctx.sender().clone();
 				let window =
-					RollingSessionWindow::new(ctx.sender(), TEST_WINDOW_SIZE, hash).await.unwrap();
+					RollingSessionWindow::new(sender, TEST_WINDOW_SIZE, hash).await.unwrap();
 
 				assert_eq!(window.earliest_session, session);
 				assert_eq!(window.session_info, vec![dummy_session_info(session)]);
diff --git a/node/subsystem-util/src/tests.rs b/node/subsystem-util/src/tests.rs
index 12c9e21220d2..34dd647932d2 100644
--- a/node/subsystem-util/src/tests.rs
+++ b/node/subsystem-util/src/tests.rs
@@ -61,6 +61,7 @@ enum Error {
 impl<Sender> JobTrait for FakeCollatorProtocolJob<Sender>
 where
 	Sender: overseer::CollatorProtocolSenderTrait + std::marker::Unpin,
+	JobSender<Sender>: overseer::CollatorProtocolSenderTrait + std::marker::Unpin,
 {
 	type ToJob = CollatorProtocolMessage;
 	type OutgoingMessages = overseer::CollatorProtocolOutgoingMessages;
@@ -86,12 +87,16 @@ where
 				FakeCollatorProtocolJob { receiver, _phantom: std::marker::PhantomData::<Sender> };
 
 			if run_args {
-				sender
-					.send_message(CollatorProtocolMessage::Invalid(
-						dummy_hash(),
-						dummy_candidate_receipt(dummy_hash()),
-					))
-					.await;
+				// FIXME XXX
+				// this was a hack for testing, for sending a message to a subsystem itself
+				// on a bounded channel which is outragiously stupid, even for a test case
+				// sender
+				// 	.send_message(CollatorProtocolMessage::Invalid(
+				// 		dummy_hash(),
+				// 		dummy_candidate_receipt(dummy_hash()),
+				// 	))
+				// 	.await;
+				unimplemented!("Probably delete this testcase entirely TODO")
 			}
 
 			// it isn't necessary to break run_loop into its own function,