Package check result: ERROR

Check: tests, Result: ERROR
    Running ‘testthat.R’ [0s/0s]
  Running the tests in ‘tests/testthat.R’ failed.
  Complete output:
    > library("testthat")
    > test_check("magmaR")
    Loading required package: magmaR
    Error in `FUN()`:
    ! In path: "/home/hornik/tmp/CRAN_special_noSuggests/magmaR.Rcheck/tests/testthat/helper-magmaR.R"
    Caused by error in `library()`:
    ! there is no package called 'vcr'
    Backtrace:
         ▆
      1. ├─testthat::test_check("magmaR")
      2. │ └─testthat::test_dir(...)
      3. │   └─testthat:::test_files(...)
      4. │     └─testthat:::test_files_serial(...)
      5. │       └─testthat:::test_files_setup_state(...)
      6. │         └─testthat::source_test_helpers(".", env)
      7. │           └─testthat::source_dir(path, "^helper.*\\.[rR]$", env = env, wrap = FALSE)
      8. │             └─base::lapply(...)
      9. │               └─testthat (local) FUN(X[[i]], ...)
     10. │                 └─testthat::source_file(path, env = env, chdir = chdir, wrap = wrap)
     11. │                   ├─base::withCallingHandlers(...)
     12. │                   └─base::eval(exprs, env)
     13. │                     └─base::eval(exprs, env)
     14. │                       └─base::library("vcr") at tests/testthat/helper-magmaR.R:4:1
     15. │                         └─base::stop(packageNotFoundError(package, lib.loc, sys.call()))
     16. └─testthat (local) `<fn>`(`<S3: packageNotFoundError>`)
     17.   └─rlang::abort(...)
    Execution halted