Browser-Tests on Tokenisehttps://tokenise.rosvetic.com/tags/browser-tests/Recent content in Browser-Tests on TokeniseHugoen-gbFri, 23 Oct 2026 11:07:00 +0000Your browser tests fail inside Claude Code's Linux sandbox. Pick the fix that costs the least isolationhttps://tokenise.rosvetic.com/posts/claude-code-sandbox-user-namespaces-chromium/Fri, 23 Oct 2026 11:07:00 +0000https://tokenise.rosvetic.com/posts/claude-code-sandbox-user-namespaces-chromium/<p>Ask Claude Code on Linux to run your browser tests with the sandbox on, and the first run ends with Chromium exiting on <code>No usable sandbox!</code>. The same wall stops rootless Podman and anything else that wants to create a user namespace. It isn&rsquo;t a bug. The Claude Code sandbox forbids it by default, and the docs list three ways round it.</p>