diff --git a/framework/src/test/java/org/toop/framework/audio/SoundEffectManagerTest.java b/framework/src/test/java/org/toop/framework/audio/SoundEffectManagerTest.java
new file mode 100644
index 0000000..302858f
--- /dev/null
+++ b/framework/src/test/java/org/toop/framework/audio/SoundEffectManagerTest.java
@@ -0,0 +1,119 @@
+package org.toop.framework.audio;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.toop.framework.resource.ResourceMeta;
+import org.toop.framework.resource.resources.BaseResource;
+import org.toop.framework.resource.types.AudioResource;
+
+import java.io.File;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Collection;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * Unit tests for SoundEffectManager.
+ */
+class MockSoundEffectResource extends BaseResource implements AudioResource {
+    boolean played = false;
+    boolean stopped = false;
+
+    public MockSoundEffectResource(String name) {
+        super(new File(name));
+    }
+
+    @Override
+    public String getName() {
+        return getFile().getName();
+    }
+
+    @Override
+    public void play() {
+        played = true;
+    }
+
+    @Override
+    public void stop() {
+        stopped = true;
+    }
+
+    @Override
+    public void setOnEnd(Runnable callback) {}
+
+    @Override
+    public void setOnError(Runnable callback) {}
+
+    @Override
+    public void updateVolume(double volume) {}
+}
+
+public class SoundEffectManagerTest {
+
+    private SoundEffectManager<MockAudioResource> manager;
+    private MockAudioResource sfx1;
+    private MockAudioResource sfx2;
+    private MockAudioResource sfx3;
+
+    @BeforeEach
+    void setUp() {
+        sfx1 = new MockAudioResource("explosion.wav");
+        sfx2 = new MockAudioResource("laser.wav");
+        sfx3 = new MockAudioResource("jump.wav");
+
+        List<ResourceMeta<MockAudioResource>> resources = List.of(
+                new ResourceMeta<>("explosion", sfx1),
+                new ResourceMeta<>("laser", sfx2),
+                new ResourceMeta<>("jump", sfx3)
+        );
+
+        manager = new SoundEffectManager<>(resources);
+    }
+
+    @Test
+    void testPlayValidSound() {
+        manager.play("explosion", false);
+        assertTrue(sfx1.played, "Sound 'explosion' should be played");
+    }
+
+    @Test
+    void testPlayInvalidSoundLogsWarning() {
+        // Nothing should crash or throw
+        assertDoesNotThrow(() -> manager.play("nonexistent", false));
+    }
+
+    @Test
+    void testStopValidSound() {
+        manager.stop("laser");
+        assertTrue(sfx2.stopped, "Sound 'laser' should be stopped");
+    }
+
+    @Test
+    void testStopInvalidSoundDoesNotThrow() {
+        assertDoesNotThrow(() -> manager.stop("does_not_exist"));
+    }
+
+    @Test
+    void testGetActiveAudioReturnsAll() {
+        Collection<MockAudioResource> active = manager.getActiveAudio();
+        assertEquals(3, active.size(), "All three sounds should be in active audio list");
+        assertTrue(active.containsAll(List.of(sfx1, sfx2, sfx3)));
+    }
+
+    @Test
+    void testDuplicateResourceKeepsLast() {
+        MockAudioResource oldRes = new MockAudioResource("duplicate_old.wav");
+        MockAudioResource newRes = new MockAudioResource("duplicate_new.wav");
+
+        List<ResourceMeta<MockAudioResource>> list = new ArrayList<>();
+        list.add(new ResourceMeta<>("dup", oldRes));
+        list.add(new ResourceMeta<>("dup", newRes)); // duplicate key
+
+        SoundEffectManager<MockAudioResource> dupManager = new SoundEffectManager<>(list);
+        dupManager.play("dup", false);
+
+        assertTrue(newRes.played, "New duplicate resource should override old one");
+        assertFalse(oldRes.played, "Old duplicate resource should be discarded");
+    }
+}