To cite package ‘testex’ in publications use:

  Kelkhoff D (2024). _testex: Add Tests to Examples_. R package version
  0.2.0.9000, , <https://github.com/dgkf/testex>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {testex: Add Tests to Examples},
    author = {Doug Kelkhoff},
    year = {2024},
    note = {R package version 0.2.0.9000, },
    url = {https://github.com/dgkf/testex},
  }