diff --git a/framework/src/test/java/org/toop/framework/audio/SoundEffectManagerTest.java b/framework/src/test/java/org/toop/framework/audio/SoundEffectManagerTest.java
index 302858f..a684e6f 100644
--- a/framework/src/test/java/org/toop/framework/audio/SoundEffectManagerTest.java
+++ b/framework/src/test/java/org/toop/framework/audio/SoundEffectManagerTest.java
@@ -39,6 +39,16 @@ class MockSoundEffectResource extends BaseResource implements AudioResource {
         stopped = true;
     }
 
+    @Override
+    public long duration() {
+        return 0;
+    }
+
+    @Override
+    public long currentPosition() {
+        return 0;
+    }
+
     @Override
     public void setOnEnd(Runnable callback) {}