The Fix
pip install celery==5.2.7
Based on closed celery/celery issue #7533 · PR/commit linked
Production note: Most teams hit this during upgrades or environment changes. Roll out with a canary and smoke critical endpoints (health, OpenAPI/docs) before 100%.
@@ -163,7 +163,7 @@ def run_tests(self):
platforms=['any'],
install_requires=install_requires(),
- python_requires=">=3.7,",
+ python_requires=">=3.7",
tests_require=reqs('test.txt'),
Option A — Upgrade to fixed release\npip install celery==5.2.7\nWhen NOT to use: This fix should not be applied if the trailing comma is required for compatibility with other tools.\n\n
Why This Fix Works in Production
- Trigger: Some Poetry environments failed to recognize the required Python version due to the trailing comma.
- Mechanism: The trailing comma in the python_requires descriptor field caused issues in some Poetry environments
- Why the fix works: Removed the trailing comma from the python_requires descriptor field in setup.py to resolve issues in some Poetry environments. (first fixed release: 5.2.7).
- If left unfixed, the same config can fail only in production (env differences), causing startup failures or partial feature outages.
Why This Breaks in Prod
- The trailing comma in the python_requires descriptor field caused issues in some Poetry environments
- Production symptom (often without a traceback): Some Poetry environments failed to recognize the required Python version due to the trailing comma.
Proof / Evidence
- GitHub issue: #7533
- Fix PR: https://github.com/celery/celery/pull/7534
- First fixed release: 5.2.7
- Reproduced locally: No (not executed)
- Last verified: 2026-02-09
- Confidence: 0.95
- Did this fix it?: Yes (upstream fix exists)
- Own content ratio: 0.79
Discussion
High-signal excerpts from the issue thread (symptoms, repros, edge-cases).
“Hey @AsserHic :wave:, Thank you for opening an issue”
“seems we can remove it https://github.com/celery/celery/pull/7534 , https://github.com/celery/kombu/blob/master/setup.py#L116”
Failure Signature (Search String)
- Some Poetry environments failed to recognize the required Python version due to the trailing comma.
Copy-friendly signature
Failure Signature
-----------------
Some Poetry environments failed to recognize the required Python version due to the trailing comma.
Error Message
Signature-only (no traceback captured)
Error Message
-------------
Some Poetry environments failed to recognize the required Python version due to the trailing comma.
What Broke
Some Poetry environments failed to recognize the required Python version due to the trailing comma.
Why It Broke
The trailing comma in the python_requires descriptor field caused issues in some Poetry environments
Fix Options (Details)
Option A — Upgrade to fixed release Safe default (recommended)
pip install celery==5.2.7
Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.
Fix reference: https://github.com/celery/celery/pull/7534
First fixed release: 5.2.7
Last verified: 2026-02-09. Validate in your environment.
When NOT to Use This Fix
- This fix should not be applied if the trailing comma is required for compatibility with other tools.
Did This Fix Work in Your Case?
Quick signal helps us prioritize which fixes to verify and improve.
Prevention
- Capture the exact failing error string in logs and tests so you can reproduce via a minimal script.
- Pin production dependencies and upgrade only with a reproducible test that hits the failing path.
Version Compatibility Table
| Version | Status |
|---|---|
| 5.2.7 | Fixed |
Related Issues
No related fixes found.
Sources
We don’t republish the full GitHub discussion text. Use the links above for context.