diff --git a/libretranslate/tests/test_api/test_language_variant_fallback.py b/libretranslate/tests/test_api/test_language_variant_fallback.py
deleted file mode 100644
index fa869c8..0000000
--- a/libretranslate/tests/test_api/test_language_variant_fallback.py
+++ /dev/null
@@ -1,123 +0,0 @@
-import sys
-import json
-import pytest
-from libretranslate.app import create_app
-from libretranslate.main import get_args
-
-
-@pytest.fixture()
-def app_with_pb():
-    sys.argv = ['', '--load-only', 'en,pb']
-    app = create_app(get_args())
-    yield app
-
-
-@pytest.fixture()
-def client_with_pb(app_with_pb):
-    return app_with_pb.test_client()
-
-
-@pytest.fixture()
-def app_with_pt():
-    sys.argv = ['', '--load-only', 'en,pt']
-    app = create_app(get_args())
-    yield app
-
-
-@pytest.fixture()
-def client_with_pt(app_with_pt):
-    return app_with_pt.test_client()
-
-
-@pytest.fixture()
-def app_with_zh():
-    sys.argv = ['', '--load-only', 'en,zh']
-    app = create_app(get_args())
-    yield app
-
-
-@pytest.fixture()
-def client_with_zh(app_with_zh):
-    return app_with_zh.test_client()
-
-
-@pytest.fixture()
-def app_with_zt():
-    sys.argv = ['', '--load-only', 'en,zt']
-    app = create_app(get_args())
-    yield app
-
-
-@pytest.fixture()
-def client_with_zt(app_with_zt):
-    return app_with_zt.test_client()
-
-
-def test_auto_detect_fallback_pt_to_pb(client_with_pb):
-    response = client_with_pb.post("/translate", data={
-        "q": "Olá mundo",
-        "source": "auto",
-        "target": "en",
-        "format": "text"
-    })
-    
-    response_json = json.loads(response.data)
-    assert response.status_code == 200
-    assert "translatedText" in response_json
-    assert len(response_json["translatedText"]) > 0
-
-
-def test_auto_detect_fallback_pb_to_pt(client_with_pt):
-    response = client_with_pt.post("/translate", data={
-        "q": "Olá mundo",
-        "source": "auto",
-        "target": "en",
-        "format": "text"
-    })
-    
-    response_json = json.loads(response.data)
-    assert response.status_code == 200
-    assert "translatedText" in response_json
-    assert len(response_json["translatedText"]) > 0
-
-
-def test_explicit_language_no_fallback(client_with_pb):
-    response = client_with_pb.post("/translate", data={
-        "q": "Hello",
-        "source": "en",
-        "target": "pt",
-        "format": "text"
-    })
-    
-    response_json = json.loads(response.data)
-    assert response.status_code == 400
-    assert "error" in response_json
-
-
-def test_auto_detect_fallback_zt_to_zh(client_with_zh):
-    response = client_with_zh.post("/translate", data={
-        "q": "你好世界",
-        "source": "auto",
-        "target": "en",
-        "format": "text"
-    })
-    
-    response_json = json.loads(response.data)
-    assert response.status_code == 200
-    assert "translatedText" in response_json
-    assert len(response_json["translatedText"]) > 0
-
-
-def test_auto_detect_fallback_zh_to_zt(client_with_zt):
-    response = client_with_zt.post("/translate", data={
-        "q": "你好世界",
-        "source": "auto",
-        "target": "en",
-        "format": "text"
-    })
-    
-    response_json = json.loads(response.data)
-    assert response.status_code == 200
-    assert "translatedText" in response_json
-    assert len(response_json["translatedText"]) > 0
-