diff --git a/src/server/unit_test/championship_test.go b/src/server/unit_test/championship_test.go
index 9b658f90..51d57256 100644
--- a/src/server/unit_test/championship_test.go
+++ b/src/server/unit_test/championship_test.go
@@ -45,3 +45,8 @@ func TestChampionshipZeroUpdate(t *testing.T) {
 	fmt.Printf("before zero update today id %d score : %d\n", todayAid, player.GetChampshipMod().GetScore())
 	player.ChampionshipZeroUpdate()
 }
+
+func TestChampionshipBack(t *testing.T) {
+	player := getTestPlayer()
+	player.BackChampship()
+}