| online | Checks related to networking | 
| on_bioconductor | Detect Bioconductor | 
| on_cran | Detect CRAN | 
| using_account | Determine whether a given user account is being used | 
| using_appveyor | Detect whether running in a CI environment | 
| using_arm_cpu | Processor Checks | 
| using_ci | Detect whether running in a CI environment | 
| using_circle_ci | Detect whether running in a CI environment | 
| using_codebuild | Detect whether running in a CI environment | 
| using_conda | Determine whether Conda environment is being used | 
| using_config | Detect whether a configuration is currently active | 
| using_container | Detect container environments | 
| using_covr | Detect covr | 
| using_cpu | Processor Checks | 
| using_databricks | Detect Databricks Runtime Environment | 
| using_docker_container | Detect container environments | 
| using_envvar | Determine whether an environment variable is being used | 
| using_github_actions | Detect whether running in a CI environment | 
| using_gitlab_ci | Detect whether running in a CI environment | 
| using_host | Checks related to networking | 
| using_interactive_session | R session information | 
| using_jenkins | Detect whether running in a CI environment | 
| using_kubernetes | Detect container environments | 
| using_latest_r_version | R session information | 
| using_linux | Tests for operating systems | 
| using_macos | Tests for operating systems | 
| using_nix_shell | Detect 'Nix' Shell | 
| using_option | Determine whether a global option is being used | 
| using_os | Tests for operating systems | 
| using_podman_container | Detect container environments | 
| using_positron | Positron environments | 
| using_positron_desktop | Positron environments | 
| using_positron_server | Positron environments | 
| using_posit_connect | RStudio environments | 
| using_python_venv | Determine whether a Python virtual environment is being used | 
| using_quarto | Quarto documents | 
| using_rstudio | RStudio environments | 
| using_rstudio_dark_theme | RStudio environments | 
| using_rstudio_desktop | RStudio environments | 
| using_rstudio_jobs | RStudio environments | 
| using_rstudio_server | RStudio environments | 
| using_rstudio_workbench | RStudio environments | 
| using_r_version | R session information | 
| using_solaris | Tests for operating systems | 
| using_testthat | Detect testthat | 
| using_travis_ci | Detect whether running in a CI environment | 
| using_vscode | Detect whether code is running in Visual Studio Code | 
| using_windows | Tests for operating systems | 
| using_x86_cpu | Processor Checks |