--- a/pallets/scheduler-v2/src/mock.rs
+++ b/pallets/scheduler-v2/src/mock.rs
@@ -187,9 +187,9 @@
 	fn service_task_named() -> Weight {
 		Weight::from_ref_time(0b0001_0100)
 	}
-	fn service_task_fetched(s: u32) -> Weight {
-		Weight::from_ref_time((s << 8) as u64 + 0b0010_0100)
-	}
+	// fn service_task_fetched(s: u32) -> Weight {
+	// 	Weight::from_ref_time((s << 8) as u64 + 0b0010_0100)
+	// }
 	fn execute_dispatch_signed() -> Weight {
 		Weight::from_ref_time(0b0100_0000)
 	}
@@ -265,6 +265,8 @@
 
 pub type LoggerCall = logger::Call<Test>;
 
+pub  type SystemCall = frame_system::Call<Test>;
+
 pub fn new_test_ext() -> sp_io::TestExternalities {
 	let t = system::GenesisConfig::default()
 		.build_storage::<Test>()
--- a/pallets/scheduler-v2/src/tests.rs
+++ b/pallets/scheduler-v2/src/tests.rs
@@ -40,7 +40,7 @@
 };
 use frame_support::{
 	assert_noop, assert_ok,
-	traits::{Contains, OnInitialize},
+	traits::{Contains, OnInitialize}, assert_err,
 };
 
 #[test]
@@ -871,3 +871,20 @@
 		assert_eq!(logger::log().len() as u32, max);
 	});
 }
+
+#[test]
+fn cannot_schedule_too_big_tasks() {
+	new_test_ext().execute_with(|| {
+		let call = Box::new(<<Test as Config>::RuntimeCall>::from(SystemCall::remark {
+			remark: vec![0; EncodedCall::bound() - 4],
+		}));
+
+		assert_ok!(Scheduler::schedule(RuntimeOrigin::root(), 4, None, Some(127), call));
+
+		let call = Box::new(<<Test as Config>::RuntimeCall>::from(SystemCall::remark {
+			remark: vec![0; EncodedCall::bound() - 3],
+		}));
+
+		assert_err!(Scheduler::schedule(RuntimeOrigin::root(), 4, None, Some(127), call), <Error<Test>>::TooBigScheduledCall);
+	});
+}