diff --git a/geoportal/tests/functional/test_themes_ogc_server_cache_clean.py b/geoportal/tests/functional/test_themes_ogc_server_cache_clean.py
index 629fc64213..ea4c69ce03 100644
--- a/geoportal/tests/functional/test_themes_ogc_server_cache_clean.py
+++ b/geoportal/tests/functional/test_themes_ogc_server_cache_clean.py
@@ -253,7 +253,7 @@ def test_ogc_server_cache_clean(self):
             content_type="application/vnd.ogc.wms_xml",
             body=DFT.format(name2="police1"),
         )
-        asyncio.run(theme._preload(set()))
+        asyncio.run(theme.preload(set()))
         responses.reset()
 
         layers, err = asyncio.run(theme._wms_getcap(ogc_server))