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> library(testthat)
> library(lutz)
> 
> test_check("lutz")
Error : foo is not a valid time zone. See ?OlsonNames
OGR: Corrupt data
── 1. Error: tz_lookup.sf works (@test-tz_lookup2.R#36)  ───────────────────────
OGR error
Backtrace:
  1. testthat::expect_equal(...)
  4. lutz::tz_lookup(pt, 3005, method = "accurate")
  6. lutz:::tz_lookup_accurate.sfc(x, crs)
  8. lutz:::tz_lookup_accurate.sf(x_sf, crs = crs)
  9. lutz:::fix_sf(x, crs)
 10. sf:::Ops.crs(sf::st_crs(x), sf::st_crs(4326))
 11. sf:::Ops.crs(e1, e2)
 12. sf:::CPL_crs_equivalent(e1$proj4string, e2$proj4string)

OGR: Corrupt data
── 2. Error: tz_lookup.SpatialPoints works (@test-tz_lookup2.R#52)  ────────────
OGR error
Backtrace:
  1. testthat::expect_equal(...)
  4. lutz::tz_lookup(pt, 3005, method = "accurate")
  6. lutz:::tz_lookup_accurate.SpatialPoints(x, crs)
  8. lutz:::tz_lookup_accurate.sf(x, crs)
  9. lutz:::fix_sf(x, crs)
 10. sf:::Ops.crs(sf::st_crs(x), sf::st_crs(4326))
 11. sf:::Ops.crs(e1, e2)
 12. sf:::CPL_crs_equivalent(e1$proj4string, e2$proj4string)

══ testthat results  ═══════════════════════════════════════════════════════════
[ OK: 1084 | SKIPPED: 0 | WARNINGS: 12 | FAILED: 2 ]
1. Error: tz_lookup.sf works (@test-tz_lookup2.R#36) 
2. Error: tz_lookup.SpatialPoints works (@test-tz_lookup2.R#52) 

Error: testthat unit tests failed
Execution halted