diff --git a/README.md b/README.md
index b720e09..ffb5e6b 100644
--- a/README.md
+++ b/README.md
@@ -240,7 +240,7 @@ For each curl test, you may define the following properties:
 - `logged_on_sso`: `true` or `false` wether the test is performed being logged in on the SSO or not (default: `false`)
 - `expect_title`: some text expected to be found in the HTML page's `<title>` (none/ignored by default)
 - `expect_content`: some text expected to be found in the HTTP payload
-- `expect_return_code`: integer, the expected HTTP return code (default `200`)
+- `expect_return_code`: integer or list of integers, the expected HTTP return code (default `200`)
 - `auto_test_assets`: wether or not to test the first CSS and first JS asset found on the HTML page (default `false` except when the app provides no curl test and use the default mode)
 - `base_url`: defaults to the app's install URL (`$domain$path`). Can be changed to something like `https://__DOMAIN__` combined with `path` set to for example `/.well-known/foobar`, useful to test URLs which may be on a different domain or always at the domain root even when the app is on a subpath (such as well-known endpoints)
 
diff --git a/lib/curl_tests.py b/lib/curl_tests.py
index f7dbb6a..bd60422 100644
--- a/lib/curl_tests.py
+++ b/lib/curl_tests.py
@@ -182,6 +182,13 @@ def test(
     base_tag = html.find("base")
     base = base_tag.get("href", "") if base_tag else ""
 
+    def code_was_expected(code: int) -> bool:
+        if isinstance(expect_return_code, int):
+            return code == expect_return_code
+        if isinstance(expect_return_code, list):
+            return code in expect_return_code
+        raise ValueError("expect_return_code should be list or int")
+
     errors = []
     if expect_effective_url is None and "/yunohost/sso" in effective_url:
         errors.append(
@@ -191,7 +198,7 @@ def test(
         errors.append(
             f"Ended up on URL '{effective_url}', but was expecting '{expect_effective_url}'"
         )
-    if expect_return_code and code != expect_return_code:
+    if not code_was_expected(code):
         errors.append(f"Got return code {code}, but was expecting {expect_return_code}")
     if expect_title is None and "Welcome to nginx" in title:
         errors.append("The request ended up on the default nginx page?")
@@ -206,7 +213,7 @@ def test(
 
     assets = []
     # Auto-check assets - though skip this if we have an unexpected return code for the main page, because there's very likely no asset to find
-    if auto_test_assets and code == expect_return_code:
+    if auto_test_assets and code_was_expected(code):
         assets_to_check = []
         stylesheets = html.find_all("link", rel="stylesheet", href=True)
         stylesheets = [