diff --git a/ttl/session/session.go b/ttl/session/session.go
index 9a7b115eb4ea9..d07419651a103 100644
--- a/ttl/session/session.go
+++ b/ttl/session/session.go
@@ -107,8 +107,8 @@ func (s *session) RunInTxn(ctx context.Context, fn func() error) (err error) {
 	success := false
 	defer func() {
 		if !success {
-			_, err = s.ExecuteSQL(ctx, "ROLLBACK")
-			terror.Log(err)
+			_, rollbackErr := s.ExecuteSQL(ctx, "ROLLBACK")
+			terror.Log(rollbackErr)
 		}
 	}()
 
diff --git a/ttl/session/session_test.go b/ttl/session/session_test.go
index a30949206223a..ecabbc8683158 100644
--- a/ttl/session/session_test.go
+++ b/ttl/session/session_test.go
@@ -39,10 +39,11 @@ func TestSessionRunInTxn(t *testing.T) {
 	}))
 	tk2.MustQuery("select * from t order by id asc").Check(testkit.Rows("1 10"))
 
-	require.NoError(t, se.RunInTxn(context.TODO(), func() error {
+	err := se.RunInTxn(context.TODO(), func() error {
 		tk.MustExec("insert into t values (2, 20)")
-		return errors.New("err")
-	}))
+		return errors.New("mockErr")
+	})
+	require.EqualError(t, err, "mockErr")
 	tk2.MustQuery("select * from t order by id asc").Check(testkit.Rows("1 10"))
 
 	require.NoError(t, se.RunInTxn(context.TODO(), func() error {