diff --git a/database/db_test.go b/database/db_test.go
index 6fa31a72..7279b91c 100644
--- a/database/db_test.go
+++ b/database/db_test.go
@@ -25,28 +25,20 @@ func TestConcurrent(t *testing.T) {
 			for n := 0; n < N; n++ {
 				v, _ := json.Marshal(fmt.Sprintf("Test-%d", n))
 				m := &model.Setting{Key: fmt.Sprintf("key-%d-%d", id, n), Value: v}
-				if id == 0 {
-					fmt.Printf("(%d) create: %d\n", id, n)
-				}
+				fmt.Printf("(%.4d) CREATE: %.4d\n", id, n)
 				uErr := db.Create(m).Error
 				if uErr != nil {
 					panic(uErr)
 				}
 				for i := 0; i < 10; i++ {
-					if id == 0 {
-						fmt.Printf("(%d) begin: %d/%d\n", id, n, i)
-					}
+					fmt.Printf("(%.4d) BEGIN: %.4d/%.4d\n", id, n, i)
 					tx := db.Begin()
-					if id == 0 {
-						fmt.Printf("(%d) first: %d/%d\n", id, n, i)
-					}
+					fmt.Printf("(%.4d) FIRST: %.4d/%.4d\n", id, n, i)
 					uErr = tx.First(m).Error
 					if uErr != nil {
 						panic(uErr)
 					}
-					if id == 0 {
-						fmt.Printf("(%d) save: %d/%d\n", id, n, i)
-					}
+					fmt.Printf("(%.4d) SAVE: %.4d/%.4d\n", id, n, i)
 					uErr = tx.Save(m).Error
 					if uErr != nil {
 						panic(uErr)