To cite package ‘testmath’ in publications use:

  Barbieri S (2026). _testmath: Unit Tests for Mathematical
  Properties_. R package version 0.1.0,
  <https://CRAN.R-project.org/package=testmath>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {testmath: Unit Tests for Mathematical Properties},
    author = {Stefano Barbieri},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=testmath},
  }