Hi Jonathan, in your package rsconnect you are using RJSONIO which has a non-free license (BSD + evil clause, see here[1]). I discussed this previously with the author of googleVis who has managed to replace RJSONIO by jsonlite[2].
For the sake of testing I replaced RJSONIO by jsonlite in the DESCRIPTION file[3], built the Debian package and was running test suite. While this throws an error (which I would like to clarify as well) I do not think that this is related to any JSON library: BEGIN TEST testthat.R R version 3.4.4 (2018-03-15) -- "Someone to Lean On" Copyright (C) 2018 The R Foundation for Statistical Computing Platform: x86_64-pc-linux-gnu (64-bit) R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > library(testthat) > library(rsconnect) > > test_check("rsconnect") -- 1. Failure: The linter identifies files not matching in case sensitivity (@te filepath.capitalization$indices == 31 isn't true. == testthat results =========================================================== OK: 178 SKIPPED: 6 FAILED: 1 1. Failure: The linter identifies files not matching in case sensitivity (@test-lint.R#50) Error: testthat unit tests failed Execution halted Can you please have a look? Kind regards Andreas. [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=712159#22 [2] https://alioth-lists.debian.net/pipermail/debian-science-maintainers/2016-July/041580.html [3] https://salsa.debian.org/r-pkg-team/r-cran-rsconnect/blob/master/debian/patches/replace_non-free_rjsonio_by_jsonlite.patch -- http://fam-tille.de