@@ -115,7 +115,7 @@ def _is_rootless() -> bool:  # pragma: win32 no cover
         return (
             # docker:
             # https://docs.docker.com/reference/api/engine/version/v1.48/#tag/System/operation/SystemInfo
-            'name=rootless' in info.get('SecurityOptions', ()) or
+            'name=rootless' in (info.get('SecurityOptions') or ()) or
             # podman:
             # https://docs.podman.io/en/latest/_static/api.html?version=v5.4#tag/system/operation/SystemInfoLibpod
             info['host']['security']['rootless']
 
@@ -89,7 +89,8 @@ def test_docker_user_rootless(info_ret):
     (
         (0, b'{"SecurityOptions": ["name=cgroupns"]}', b''),
         (0, b'{"host": {"security": {"rootless": false}}}', b''),
-        (0, b'{"respone_from_some_other_container_engine": true}', b''),
+        (0, b'{"response_from_some_other_container_engine": true}', b''),
+        (0, b'{"SecurityOptions": null}', b''),
         (1, b'', b''),
     ),
 )
Original file line number	Diff line number	Diff line change
@@ -89,7 +89,8 @@ def test_docker_user_rootless(info_ret):
89	89	(
90	90	(0, b'{"SecurityOptions": ["name=cgroupns"]}', b''),
91	91	(0, b'{"host": {"security": {"rootless": false}}}', b''),
92		- (0, b'{"respone_from_some_other_container_engine": true}', b''),
	92	+ (0, b'{"response_from_some_other_container_engine": true}', b''),
	93	+ (0, b'{"SecurityOptions": null}', b''),
93	94	(1, b'', b''),
94	95	),
95	96	)