diff --git a/src/music_kraken/objects/song.py b/src/music_kraken/objects/song.py
index d599576..1f2464d 100644
--- a/src/music_kraken/objects/song.py
+++ b/src/music_kraken/objects/song.py
@@ -113,7 +113,7 @@ class Song(MainObject):
 
         for artist in self.main_artist_collection:
             for album in self.album_collection:
-                artist.main_album_collection.append(self, merge_on_conflict=merge, merge_into_existing=False)
+                artist.main_album_collection.append(album, merge_on_conflict=merge, merge_into_existing=False)
                 artist._build_recursive_structures(build_version=build_version, merge=merge)
 
     @property
diff --git a/src/tests/building_objects.py b/src/tests/test_building_objects.py
similarity index 84%
rename from src/tests/building_objects.py
rename to src/tests/test_building_objects.py
index 46bb7bb..10456ae 100644
--- a/src/tests/building_objects.py
+++ b/src/tests/test_building_objects.py
@@ -35,7 +35,7 @@ class TestSong(unittest.TestCase):
         
         self.artist_list = []
         
-        main_artist_list=[
+        self.main_artist_list=[
             objects.Artist(
                 name="I'm in a coffin",
                 source_list=[
@@ -56,7 +56,7 @@ class TestSong(unittest.TestCase):
                 )
             ]
         
-        self.artist_list.extend(main_artist_list)
+        self.artist_list.extend(self.main_artist_list)
         self.artist_list.extend(feature_artist_list)
         
         self.song = objects.Song(
@@ -81,13 +81,19 @@ class TestSong(unittest.TestCase):
                                "https://ln.topdf.de/Music-Kraken/")
             ],
             album_list=self.album_list,
-            main_artist_list=main_artist_list,
+            main_artist_list=self.main_artist_list,
             feature_artist_list=feature_artist_list,
         )
+        
+        self.song.compile()
 
     def test_album(self):
-        pass
+        for artist in self.song.main_artist_collection:
+            for artist_album in artist.main_album_collection:
+                self.assertIn(artist_album, self.song.album_collection)
     
     def test_artist(self):
-        pass
+        for album in self.song.album_collection:
+            for album_artist in album.artist_collection:
+                self.assertIn(album_artist, self.song.main_artist_collection)