diff --git a/src/test/java/device/usbPlayer/UsbPlayerTest.java b/src/test/java/device/usbPlayer/UsbPlayerTest.java
index 12f199d..bd85948 100644
--- a/src/test/java/device/usbPlayer/UsbPlayerTest.java
+++ b/src/test/java/device/usbPlayer/UsbPlayerTest.java
@@ -1,52 +1,17 @@
 package device.usbPlayer;
 
-import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
-
 import java.util.stream.Stream;
-import org.junit.jupiter.params.ParameterizedTest;
-import org.junit.jupiter.params.provider.Arguments;
-import org.junit.jupiter.params.provider.MethodSource;
-
 import java.util.ArrayList;
-import java.util.stream.Stream;
 
-import static org.junit.jupiter.api.Assertions.*;
 import static org.assertj.core.api.Assertions.assertThat;
 
 class UsbPlayerTest {
 
     UsbPlayer up = new UsbPlayer();
 
-
-
-/*
-    @Test
-    void getVolume() {
-    }
-
-    @Test
-    void next() {
-    }
-
-    @Test
-    void prev() {
-    }
-
-    @Test
-    void getInfoText() {
-    }
-
-    @Test
-    void getOptions() {
-    }
-
-    @Test
-    void chooseOption() {
-    }*/
-
     @ParameterizedTest
     @MethodSource("PlayOptions")
     void playTest(String testName, UsbPlayer inputPlay, String expectedResult) {
@@ -54,7 +19,6 @@ class UsbPlayerTest {
         assertThat(playState).describedAs(testName).isEqualTo(expectedResult);
     }
 
-
     static Stream<Arguments> PlayOptions() {
         UsbPlayer up1 = new UsbPlayer();
         UsbPlayer up8 = new UsbPlayer();
@@ -103,4 +67,23 @@ void louderTest(String testName, UsbPlayer inputPlay, int expectedResult) {
         );
     }
 
+    @ParameterizedTest
+    @MethodSource("quieterOptions")
+    void quieterTest(String testName, UsbPlayer inputPlay, int expectedResult) {
+        int volumeNum = inputPlay.getLautstaerke();
+        assertThat(volumeNum).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> quieterOptions() {
+        UsbPlayer up1 = new UsbPlayer();
+        up1.quieter();
+        UsbPlayer up2 = new UsbPlayer();
+        up2.setLautstaerke(10);
+        up2.quieter();
+        return Stream.of(
+                Arguments.of("Volume must stay 0 ", up1, 0),
+                Arguments.of("Volume must be 9 ", up2, 9)
+        );
+    }
+
 }
\ No newline at end of file