diff --git a/src/test/java/device/usbPlayer/UsbPlayerTest.java b/src/test/java/device/usbPlayer/UsbPlayerTest.java
index 1c8ae91..9c553f8 100644
--- a/src/test/java/device/usbPlayer/UsbPlayerTest.java
+++ b/src/test/java/device/usbPlayer/UsbPlayerTest.java
@@ -289,6 +289,13 @@ class UsbPlayerTest {
         Pl4.add("Musik 02.aac");
         Pl4.add("Musik 03.aac");
         up6.setPlaylist(Pl4);
+        //mixed Audio and text Files in the Album
+        UsbPlayer up7 = new UsbPlayer();
+        ArrayList<String> Pl5 = new ArrayList<String>();
+        Pl5.add("Musik 01.aac");
+        Pl5.add("Musik 02.txt");
+        Pl5.add("Musik 03.aac");
+        up7.setPlaylist(Pl5);
 
         return Stream.of(
                 Arguments.of("Check if the Files are .mp3 ", up1.isAllAudio(), true),
@@ -296,7 +303,8 @@ class UsbPlayerTest {
                 Arguments.of("Check if the Files are .m4a ", up3.isAllAudio(), true),
                 Arguments.of("Check if the Files are .wav ", up4.isAllAudio(), true),
                 Arguments.of("Check if the Files are .wma ", up5.isAllAudio(), true),
-                Arguments.of("Check if the Files are .aac ", up6.isAllAudio(), true)
+                Arguments.of("Check if the Files are .aac ", up6.isAllAudio(), true),
+                Arguments.of("Check case of mixed Files", up7.isAllAudio(), false)
 
         );
     }