/usr/lib/R/site-library/lambda.r/unitTests/ is in r-cran-lambda.r 1.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/R/site-library/lambda.r/unitTests/runit.auto_replace.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.auto_replace.2.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.auto_replace.3.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.dispatching.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.ellipsis_arguments.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.ellipsis_arguments.2.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.examples.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.factorial.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.factorial.2.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.fill_args.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.function_args.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.function_type.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.heaviside_step.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.heaviside_step.2.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.infix.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.optional_arguments.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.optional_arguments.2.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.parse_transforms.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.parse_transforms.2.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.parse_transforms.3.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.pattern_matching.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.taylor_series.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.type_any_type.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.type_ellipsis.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.type_functions.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.type_inheritance.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.type_integer_inheritance.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.type_variable.1.R
/usr/lib/R/site-library/lambda.r/unitTests/runit.types.1.R