CLAUDE_CODE_STALL_TIMEOUT_MS_FOR_TESTING

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_STALL_TIMEOUT_MS_FOR_TESTING is a Claude Code environment variable. Removed in v2.1.295, so current releases ignore it. It is not in the official reference.

Status	Removed in v2.1.295
Added	Present since v2.1.69 or earlier
Category	Network and proxy
Official docs	Not listed

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_STALL_TIMEOUT_MS_FOR_TESTING=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_STALL_TIMEOUT_MS_FOR_TESTING": "<value>"
  }
}

Related variables

CLAUDE_ASYNC_AGENT_STALL_TIMEOUT_MS: Default 600,000ms (10 minutes).
API_FORCE_IDLE_TIMEOUT
API_TIMEOUT_MS: Request timeout in milliseconds.
BASH_DEFAULT_TIMEOUT_MS
BASH_MAX_TIMEOUT_MS
CLAUDE_AFK_TIMEOUT_MS
CLAUDE_BYTE_STREAM_IDLE_TIMEOUT_MS
CLAUDE_CODE_CONNECT_TIMEOUT_MS

Frequently asked questions

Which Claude Code version has CLAUDE_CODE_STALL_TIMEOUT_MS_FOR_TESTING?

Removed in v2.1.295, so current releases ignore it.

How do I set CLAUDE_CODE_STALL_TIMEOUT_MS_FOR_TESTING?

Export it before starting Claude Code (export CLAUDE_CODE_STALL_TIMEOUT_MS_FOR_TESTING=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.