diff --git a/image_test.go b/image_test.go
index ba22602..3cb74fa 100644
--- a/image_test.go
+++ b/image_test.go
@@ -54,7 +54,7 @@ func TestImageConvert(t *testing.T) {
 }
 
 func TestImageMetadata(t *testing.T) {
-	data, err := initImage("test.png").Metadata(PNG)
+	data, err := initImage("test.png").Metadata()
 	if err != nil {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
@@ -64,6 +64,9 @@ func TestImageMetadata(t *testing.T) {
 	if data.Size.Width != 400 {
 		t.Fatal("Invalid width size")
 	}
+	if data.Type != "png" {
+		t.Fatal("Invalid image type")
+	}
 }
 
 func initImage(file string) *Image {