diff --git a/core/src/consensus/tendermint/vote_regression_checker.rs b/core/src/consensus/tendermint/vote_regression_checker.rs
index fc37907afa..5538c9ea45 100644
--- a/core/src/consensus/tendermint/vote_regression_checker.rs
+++ b/core/src/consensus/tendermint/vote_regression_checker.rs
@@ -13,10 +13,13 @@ impl VoteRegressionChecker {
     }
 
     pub fn check(&mut self, vote_on: &VoteOn) -> bool {
-        assert!(match vote_on.step.step {
-            Step::Propose | Step::Prevote | Step::Precommit => true,
-            _ => false,
-        });
+        assert!(
+            match vote_on.step.step {
+                Step::Propose | Step::Prevote | Step::Precommit => true,
+                _ => false,
+            },
+            "We don't vote on Commit. Check your code"
+        );
 
         let monotonic = if let Some(last_vote) = &self.last_vote {
             match last_vote.step.cmp(&vote_on.step) {
@@ -55,15 +58,15 @@ mod tests {
 
     #[test]
     #[should_panic]
-    fn test_disallow_commit() {
+    fn test_panic_on_commit() {
         let mut checker = VoteRegressionChecker::new();
 
         let random_commit_step = VoteStep::new(100, 10, Step::Commit);
         let random_hash = Some(H256::random());
-        assert!(checker.check(&VoteOn {
+        checker.check(&VoteOn {
             step: random_commit_step,
-            block_hash: random_hash
-        }))
+            block_hash: random_hash,
+        });
     }
 
     #[test]