To cite package ‘testthat.buildkite’ in publications use:

  Ashton R (2024). _testthat.buildkite: A testthat reporter for
  buildkite_. R package version 0.0.1,
  <https://github.com/mrc-ide/testthat.buildkite>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {testthat.buildkite: A testthat reporter for buildkite},
    author = {Robert Ashton},
    year = {2024},
    note = {R package version 0.0.1},
    url = {https://github.com/mrc-ide/testthat.buildkite},
  }