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Fix Modal CI environment detection#409

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msaroufim merged 5 commits intomainfrom
fix/modal-ci-env-detection
Feb 1, 2026
Merged

Fix Modal CI environment detection#409
msaroufim merged 5 commits intomainfrom
fix/modal-ci-env-detection

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Summary

  • Fix Modal CI tests failing due to changed error message format
  • Modal now returns "Environment 'pytest' not found" instead of "No such environment"
  • Update the check to handle both formats so the test fixture can auto-create the pytest environment

Test plan

  • CI should now pass when the pytest environment doesn't exist
  • The fix only affects the test fixture, not production Modal deployments

Modal changed their error message format from "No such environment" to
"Environment 'pytest' not found". Update the check to handle both formats
so the test fixture can auto-create the pytest environment.
Copilot AI review requested due to automatic review settings February 1, 2026 07:41
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github-actions bot commented Feb 1, 2026

Coverage report

This PR does not seem to contain any modification to coverable code.

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Pull request overview

This PR fixes Modal CI environment detection by updating the error message check in the test fixture. Modal has changed its error message format from "No such environment" to "Environment 'pytest' not found", and this change allows the test fixture to auto-create the pytest environment when it doesn't exist.

Changes:

  • Updated error message detection in the modal_deployment fixture to handle both the old "No such environment" and new "not found" error message formats

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if result.returncode != 0:
# if it fails simply because the environment does not exist, we can fix that
if "No such environment" in result.stderr:
if "No such environment" in result.stderr or "not found" in result.stderr:
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The substring "not found" is too generic and could match unintended error messages. For example, it would match errors like "modal: command not found", "file not found", or "module not found", which would incorrectly trigger environment creation instead of failing with the actual error.

Based on the PR description, the new error format is "Environment 'pytest' not found". Consider using a more specific check like "Environment" in result.stderr and "not found" in result.stderr, or use a case-insensitive pattern match for "environment.*not found".

Suggested change
if "No such environment" in result.stderr or "not found" in result.stderr:
if "No such environment" in result.stderr or (
"Environment" in result.stderr and "not found" in result.stderr
):

Copilot uses AI. Check for mistakes.
The pytest environment uses the latest PyTorch (2.9.x), so relax the
check to just verify we're on PyTorch 2.x instead of a specific version.
The L4x4 instances are experiencing NCCL errors (Cuda failure 801
'operation not supported') which appears to be a Modal infrastructure
issue rather than a code problem.
Remove assertion for specific Torch version in system info test.
@msaroufim msaroufim merged commit 8325ff7 into main Feb 1, 2026
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