Running ‘run-core.R’
  Running ‘run-cpo.R’ [83s/76s]
  Running ‘run-meta.R’ [30s/23s]
  Running ‘run-zzzlint.R’
Running the tests in ‘tests/run-cpo.R’ failed.
Complete output:
  > library(testthat)
  > ISTESTING = TRUE  # nolint
  > test_check("mlrCPO", filter = "^cpo_")
  Loading required package: mlrCPO
  Loading required package: ParamHelpers
  Loading required package: mlr
  'mlr' is in maintenance mode since July 2019. Future development
  efforts will go into its successor 'mlr3' (<https://mlr3.mlr-org.com>).
  Starting 2 test processes
  ══ Skipped tests ═══════════════════════════════════════════════════════════════
  ● On CRAN (1)
  
  ══ Warnings ════════════════════════════════════════════════════════════════════
  ── Warning (test_cpo_impute.R:140:3): CPO ImputeWrapper ────────────────────────
  `expect_is()` was deprecated in the 3rd edition.
  i Use `expect_type()`, `expect_s3_class()`, or `expect_s4_class()` instead
  Backtrace:
   1. testthat::expect_is(mm, "rpart")
   2. testthat:::edition_deprecate(3, "expect_is()", "Use `expect_type()`, `expect_s3_class()`, or `expect_s4_class()` instead")
  ── Warning (test_cpo_impute.R:143:3): CPO ImputeWrapper ────────────────────────
  `expect_is()` was deprecated in the 3rd edition.
  i Use `expect_type()`, `expect_s3_class()`, or `expect_s4_class()` instead
  Backtrace:
   1. testthat::expect_is(mm, "WrappedModel")
   2. testthat:::edition_deprecate(3, "expect_is()", "Use `expect_type()`, `expect_s3_class()`, or `expect_s4_class()` instead")
  
  ══ Failed tests ════════════════════════════════════════════════════════════════
  ── Error (test_cpo_filter.R:73:5): specialised CPOs work ───────────────────────
  Error: For CPO FSelector_chi.squared please install the following packages: FSelector
  Backtrace:
      █
   1. └─mlrCPO:::cpoconst(perc = 0.5)
   2.   └─mlrCPO:::requireCPOPackages(cpo)
   3.     └─base::tryCatch(...)
   4.       └─base:::tryCatchList(expr, classes, parentenv, handlers)
   5.         └─base:::tryCatchOne(expr, names, parentenv, handlers[[1L]])
   6.           └─value[[3L]](cond)
  
  [ FAIL 1 | WARN 2 | SKIP 1 | PASS 433 ]
  Error: Test failures
  Execution halted