If you haven't checked 0.5.8 yet, you can just skip it and use 0.5.9 (unless 0.5.8 is OK and 0.5.9 not)
── R CMD check results ───────────────────────────────── RKorAPClient 0.5.9 ──── Duration: 3m 38.4s 0 errors ✓ | 0 warnings ✓ | 0 notes ✓ R CMD check succeeded
Fixed already in v0.5.8: Donttest compatibility issues with dplyr 1.0.0: https://www.stats.ox.ac.uk/pub/bdr/donttest/RKorAPClient.out
… reports the following dependency issue which, however, does not appear on any other test build (win builder, mac, Ubuntu, Fedora) and seems unrelated to RKorAPClient:
877#> trying URL 'https://cloud.r-project.org/bin/windows/contrib/4.1/PTXQC_1.0.4.zip' 878#> Content type 'application/zip' length 4038469 bytes (3.9 MB) 879#> ================================================== 880#> downloaded 3.9 MB 881#> setting _R_CHECK_FORCE_SUGGESTS_ to false 882#> setting R_COMPILE_AND_INSTALL_PACKAGES to never 883#> setting _R_CHECK_THINGS_IN_CHECK_DIR_ to false 884#> setting R_REMOTES_STANDALONE to true 885#> setting R_REMOTES_NO_ERRORS_FROM_WARNINGS to true 886#> setting _R_CHECK_FORCE_SUGGESTS_ to true 887#> setting _R_CHECK_CRAN_INCOMING_USE_ASPELL_ to true 888#> * installing to library 'C:/Users/USERSHFYCydkVg/R' 889#> * installing *source* package 'RKorAPClient' ... 890#> ** using staged installation 891#> ** R 892#> ** demo 893#> ** byte-compile and prepare package for lazy loading 894#> Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) : 895#> namespace 'vctrs' 0.2.4 is being loaded, but >= 0.3.0 is required 896#> Calls: ... namespaceImport -> loadNamespace -> namespaceImport -> loadNamespace 897#> Execution halted 898#> ERROR: lazy loading failed for package 'RKorAPClient' 899#> * removing 'C:/Users/USERSHFYCydkVg/R/RKorAPClient'
I've tried to reduce the time required for the tests.