diff --git a/lib/curl_tests.py b/lib/curl_tests.py
index e0f765d..86a48b4 100644
--- a/lib/curl_tests.py
+++ b/lib/curl_tests.py
@@ -168,8 +168,8 @@ def test(
     content = content.get_text().strip() if content else ""
     content = re.sub(r"[\t\n\s]{3,}", "\n\n", content)
 
-    base_tag = html.find('base')
-    base = base_tag['href'] if base_tag else ''
+    base_tag = html.find("base")
+    base = base_tag["href"] if base_tag else ""
 
     errors = []
     if expect_effective_url is None and "/yunohost/sso" in effective_url: