Answers for "LoadError: cannot load such file -- parallel_tests/rspec/failures_logger"

LoadError: cannot load such file -- parallel_tests/rspec/failures_logger

PARALLEL_TESTS_EXECUTABLE="bundle exec rspec" be rake parallel:spec

TEST_ENV_NUMBER=;export TEST_ENV_NUMBER;PARALLEL_TEST_GROUPS=4;export PARALLEL_TEST_GROUPS;bundle exec rspec
……

LoadError: cannot load such file -- parallel_tests/rspec/failures_logger

$ be rake parallel:spec

TEST_ENV_NUMBER=;export TEST_ENV_NUMBER;PARALLEL_TEST_GROUPS=4;export PARALLEL_TEST_GROUPS;bin/rspec
……

LoadError: cannot load such file -- parallel_tests/rspec/failures_logger

if !Process.respond_to?(:fork) || Gem::Specification.find_all_by_name("spring").empty?
  exec "bundle", "exec", "rspec", *ARGV
else
  if ENV["TEST_ENV_NUMBER"].nil? || ENV["TEST_ENV_NUMBER"].empty?
    ARGV.unshift "rspec"
    load Gem.bin_path("spring", "spring")
  else
    exec "bundle", "exec", "rspec", *ARGV
  end
end

LoadError: cannot load such file -- parallel_tests/rspec/failures_logger

# .rspec_parallel

--format progress
--format ParallelTests::RSpec::FailuresLogger --out tmp/failing_specs.log