Phil Ewels
Chris Hakkaart
Marcel Ribeiro-Dantas
Several speakersDec 21, 2022

News and Views: nf-test, mentorships and debugging resume

nf-test, mentorships and debugging resume

In this News and Views episode, Phil Ewels, Chris Hakkaart, and Marcel Ribeiro-Dantas discuss the hottest topics in the Nextflow world.


  • nf-test is a simple test framework for Nextflow pipelines.
  • nf-test has a range of functions that can be used to test a pipeline to ensure it is being run correctly.
    • Documentation can be found here.
  • Edmund Miller recently presented a ByteSize talk discussing nf-test.
  • nf-test is being incorporated into some nf-core pipelines and will likely be incorporated into all nf-core pipelines in the future.

Nextflow and nf-core mentorship program

  • Nextflow and nf-core runs a mentorship program that is supported by our Chan Zuckerberg Initiative grant.
  • Round 1 of the program was a great success.
    • Check out the blog post to see what our mentor/mentee paris did.
  • Round 2 of the mentorship program started in December 2022 and will finish in March 2023.
  • Participation jumped from 5 pairs last round to 13 pairs made up of mentors and mentees from around the globe.
  • Keep an eye out for updates and the next round starting in the middle of next year.

Debugging resume

  • Abhinav Sharma wrote a fantastic blog post about caching behavior.
  • Using a hands-on approach he highlights some strategies that can be used to understand what is causing a particular process (or processes) to re-run, instead of using the cache from previous runs of the pipeline.
  • A great example of a community post that is addressing a common question we see in the Slack channels.