diff --git a/hybridrouter/tests/conftest.py b/hybridrouter/tests/conftest.py
index 403cb4c..200164b 100644
--- a/hybridrouter/tests/conftest.py
+++ b/hybridrouter/tests/conftest.py
@@ -34,7 +34,11 @@ def pytest_exception_interact(node, call, report):
                 return
 
         urls_list = list_urls(all_urls, prefix="http://localhost/")
-        urls_text = "\n".join(urls_list)
+
+        if urls_list and isinstance(urls_list, list):
+            urls_text = "\n".join(urls_list)
+        else:
+            urls_text = "Aucune URL disponible."
 
         if hasattr(report, "longrepr"):
             report.longrepr = f"{report.longrepr}\n\nAvailable URLs:\n{urls_text}"
diff --git a/hybridrouter/tests/test_hybrid_router.py b/hybridrouter/tests/test_hybrid_router.py
index d99d524..ce4642e 100644
--- a/hybridrouter/tests/test_hybrid_router.py
+++ b/hybridrouter/tests/test_hybrid_router.py
@@ -11,7 +11,7 @@
 from .conftest import recevoir_test_url_resolver
 from .models import Item
 from .views import ItemView, item_view
-from .viewsets import ItemViewSet, SlugItemViewSet
+from .viewsets import ItemViewSet, SlugItemViewSet, EmptyViewSet
 
 
 def create_urlconf(router):
@@ -602,3 +602,17 @@ def test_no_intermediate_view_with_nested_router(hybrid_router, db):
         # Les URLs du routeur imbriqué devraient être accessibles
         response = APIClient().get("/items/subitems/")
         assert response.status_code == status.HTTP_200_OK
+
+
+def test_get_viewset_urls_with_empty_mapping(hybrid_router, db):
+    hybrid_router.register("empty", EmptyViewSet, basename="empty")
+
+    urlconf = create_urlconf(hybrid_router)
+
+    with override_settings(ROOT_URLCONF=urlconf):
+        resolver = get_resolver(urlconf)
+        recevoir_test_url_resolver(resolver.url_patterns)
+
+        urls = hybrid_router.get_urls()
+
+        assert len(urls) == 0
diff --git a/hybridrouter/tests/viewsets.py b/hybridrouter/tests/viewsets.py
index 8d75a2c..7e99750 100644
--- a/hybridrouter/tests/viewsets.py
+++ b/hybridrouter/tests/viewsets.py
@@ -1,4 +1,4 @@
-from rest_framework.viewsets import ModelViewSet
+from rest_framework.viewsets import ModelViewSet, ViewSet
 from .models import Item
 from .serializers import ItemSerializer
 
@@ -12,3 +12,7 @@ class SlugItemViewSet(ModelViewSet):
     queryset = Item.objects.all()
     serializer_class = ItemSerializer
     lookup_field = "name"
+
+
+class EmptyViewSet(ViewSet):
+    pass