To cite package ‘httptest2’ in publications use:

  Richardson N (2024). _httptest2: Test Helpers for 'httr2'_. R package
  version 1.1.0.9000, , <https://github.com/nealrichardson/httptest2>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {httptest2: Test Helpers for 'httr2'},
    author = {Neal Richardson},
    year = {2024},
    note = {R package version 1.1.0.9000, 
},
    url = {https://github.com/nealrichardson/httptest2},
  }