Running 'spelling.R' [0s]
  Running 'testthat.R' [4s]
Running the tests in 'tests/testthat.R' failed.
Complete output:
  > library(testthat)
  > library(ggthemes)
  > 
  > test_check("ggthemes")
  -- 1. Error: theme economist with dark panel works (@test-economist.R#48)  -----
  DLL 'dplyr' not found: maybe not installed for this architecture?
  Backtrace:
    1. testthat::expect_equal(...)
    5. dplyr::filter
    6. base::getExportedValue(pkg, name)
    7. base::asNamespace(ns)
    8. base::getNamespace(ns)
    9. base::loadNamespace(name)
   10. base::library.dynam(lib, package, package.lib)
  
  -- 2. Error: theme economist_white works (@test-economist.R#54)  ---------------
  DLL 'dplyr' not found: maybe not installed for this architecture?
  Backtrace:
    1. ggthemes::theme_economist_white(gray_bg = FALSE)
    7. ggthemes:::get_colors(c("economist", "bg"), "dark gray")
    8. dplyr::filter
    9. base::getExportedValue(pkg, name)
   10. base::asNamespace(ns)
   11. base::getNamespace(ns)
   12. base::loadNamespace(name)
   13. base::library.dynam(lib, package, package.lib)
  
  -- 3. Error: theme economist_white with gray background works (@test-economist.R
  DLL 'dplyr' not found: maybe not installed for this architecture?
  Backtrace:
   1. ggthemes::theme_economist_white(gray_bg = TRUE)
   2. ggthemes:::get_colors(c("economist", "bg"), "light gray")
   3. dplyr::filter
   4. base::getExportedValue(pkg, name)
   5. base::asNamespace(ns)
   6. base::getNamespace(ns)
   7. base::loadNamespace(name)
   8. base::library.dynam(lib, package, package.lib)
  
  == testthat results  ===========================================================
  [ OK: 269 | SKIPPED: 1 | WARNINGS: 0 | FAILED: 3 ]
  1. Error: theme economist with dark panel works (@test-economist.R#48) 
  2. Error: theme economist_white works (@test-economist.R#54) 
  3. Error: theme economist_white with gray background works (@test-economist.R#61) 
  
  Error: testthat unit tests failed
  Execution halted