diff --git a/helper.go b/helper.go
index e90659e..4f72bcf 100644
--- a/helper.go
+++ b/helper.go
@@ -125,7 +125,7 @@ func ConvertStr(str string) string {
 	} else if h := d*24 + h2 - h1; h > 1 || (h == 1 && mi2-mi1 >= 0) {
 		return fmt.Sprintf(HOURS_AGO, h)
 	} else if mi := h*60 + mi2 - mi1; mi > 1 || (mi == 1 && s2-s1 >= 0) {
-		return fmt.Sprintf(MINUTES_AGO, m)
+		return fmt.Sprintf(MINUTES_AGO, mi)
 	}
 	return JUST_NOW
 }
diff --git a/helper_test.go b/helper_test.go
index d5242d9..4502161 100644
--- a/helper_test.go
+++ b/helper_test.go
@@ -44,15 +44,21 @@ func TestPickFirstImage(t *testing.T) {
 }
 
 func TestCovertStr(t *testing.T) {
+	now := time.Now().UTC()
 	testStr := []string{
-		time.Now().Format("2006-01-02T15:04:05"),
+		now.Format("2006-01-02T15:04:05"),
+		now.Add(-time.Second * 20).Format("2006-01-02T15:04:05"),
+		now.Add(-time.Minute).Format("2006-01-02T15:04:05"),
+		now.Add(-time.Minute * 2).Format("2006-01-02T15:04:05"),
+		now.Add(-time.Minute * 20).Format("2006-01-02T15:04:05"),
+		now.Add(-time.Hour).Format("2006-01-02T15:04:05"),
+		now.Add(-time.Hour * 2).Format("2006-01-02T15:04:05"),
+		now.Add(-time.Hour * 24).Format("2006-01-02T15:04:05"),
 	}
 
-	expectStr := []string{
-		JUST_NOW,
-	}
-
-	for i, v := range testStr {
-		assert.Equal(t, expectStr[i], ConvertStr(v))
+	time.Sleep(time.Second)
+	t.Log(now.Format("2006-01-02T15:04:05"))
+	for _, v := range testStr {
+		t.Log(v, ConvertStr(v))
 	}
 }