diff --git a/e2e/unit/api/test_api.py b/e2e/unit/api/test_api.py
index 36ddd52..45addfb 100644
--- a/e2e/unit/api/test_api.py
+++ b/e2e/unit/api/test_api.py
@@ -54,9 +54,9 @@ def test_api_upload_flac_file(base_url, upload_folder):
     if os.path.exists(expected_filename):
         os.remove(expected_filename)
 
-def test_api_upload_wav_file(base_url, upload_folder):
-    files = {'file': ('test.wav', io.BytesIO(b'fake wav content'))}
-    expected_filename = os.path.join(upload_folder, secure_filename('test.wav'))
+def test_api_upload_m4a_file(base_url, upload_folder):
+    files = {'file': ('test.m4a', io.BytesIO(b'fake m4a content'))}
+    expected_filename = os.path.join(upload_folder, secure_filename('test.m4a'))
     response = requests.post(f'{base_url}/', files=files)
     assert response.status_code == 400
     assert "not allowed" in response.json().get("error", "")