Changed to Postgres

manage.py

@@ -8,6 +8,13 @@ import sys
 def main():
     """Run administrative tasks."""
     os.environ.setdefault("DJANGO_SETTINGS_MODULE", "proyecto.settings")
+
+    # Si se ejecuta `manage.py test` sin labels, limitar a pruebas de tienda/tests.py.
+    if len(sys.argv) >= 2 and sys.argv[1] == "test":
+        has_test_labels = any(not arg.startswith("-") for arg in sys.argv[2:])
+        if not has_test_labels:
+            sys.argv.append("tienda.tests")
+
     try:
         from django.core.management import execute_from_command_line
     except ImportError as exc: