Fix to slurm tests

[transientlunatic]

Description

Brief description of what this PR does.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code refactoring
• Performance improvement
• Test coverage improvement

Motivation and Context

Why is this change needed? What problem does it solve?

Fixes #(issue number) (if applicable)

Changes Made

List the main changes:

Testing

How has this been tested?

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• Tested with pipeline: (LALInference / Bilby / BayesWave / RIFT / N/A)

Test configuration:

• Python version(s):
• Operating System:
• Cluster environment (if applicable):

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published

Documentation

• Documentation updated (if applicable)
• Changelog entry added
• README updated (if applicable)

Breaking Changes

Does this PR introduce any breaking changes? If yes, describe:

Additional Notes

Any additional information, concerns, or considerations for reviewers.

Screenshots (if applicable)

For UI or output changes, include before/after screenshots or terminal output.

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Reviewer Notes:

• Does this PR need review from specific domain experts?
• Any particular areas that need careful review?

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