Fix tests

spec/spec_helper.rb

@@ -1,7 +1,7 @@
 require 'bundler/setup'
 Bundler.setup
 
-$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
+$LOAD_PATH.unshift File.expand_path('../../lib', __dir__)
 
 require 'timecop'
 require 'byebug'
@@ -10,14 +10,14 @@ require 'generators/crono/install/templates/migrations/create_crono_jobs.rb'
 
 # setting default time zone
 # In Rails project, Time.zone_default equals "UTC"
-Time.zone_default = Time.find_zone("UTC")
+Time.zone_default = Time.find_zone('UTC')
 
 ActiveRecord::Base.establish_connection(
   adapter: 'sqlite3',
   database: 'file::memory:?cache=shared'
 )
 
-ActiveRecord::Base.logger = Logger.new(STDOUT)
+ActiveRecord::Base.logger = Logger.new($stdout)
 CreateCronoJobs.up
 
 class TestJob
@@ -27,6 +27,6 @@ end
 
 class TestFailingJob
   def perform
-    fail 'Some error'
+    raise 'Some error'
   end
 end