diff --git a/lib/crono/cli.rb b/lib/crono/cli.rb
index 478c755..f10f545 100644
--- a/lib/crono/cli.rb
+++ b/lib/crono/cli.rb
@@ -62,7 +62,7 @@ module Crono
       logger.info 'Jobs:'
       Crono.scheduler.jobs.each do |job|
         logger.info "'#{job.performer}' with rule '#{job.period.description}'"\
-                    "next time will perform at #{job.next}"
+                    " next time will perform at #{job.next}"
       end
     end
 
@@ -80,7 +80,7 @@ module Crono
     end
 
     def start_working_loop
-      while true
+      loop do
         next_time, jobs = Crono.scheduler.next_jobs
         sleep(next_time - Time.now)
         jobs.each(&:perform)
diff --git a/lib/crono/job.rb b/lib/crono/job.rb
index 24a7922..276e373 100644
--- a/lib/crono/job.rb
+++ b/lib/crono/job.rb
@@ -60,9 +60,7 @@ module Crono
     end
 
     def perform_job
-      performer_instance = performer.new
-      performer_instance.instance_variable_set(:@_crono_job, self)
-      performer_instance.perform
+      performer.new.perform
       finished_time_sec = format('%.2f', Time.now - last_performed_at)
     rescue StandardError => e
       handle_job_fail(e, finished_time_sec)
diff --git a/spec/job_spec.rb b/spec/job_spec.rb
index 6eb8c45..029e50c 100644
--- a/spec/job_spec.rb
+++ b/spec/job_spec.rb
@@ -32,23 +32,10 @@ describe Crono::Job do
       expect(saved_log).to include 'Some error'
     end
 
-    xit 'should set Job#healthy to true if perform ok' do
-      class TestJob
-        def perform
-          @_crono_job
-        end
-      end
-      job.perform.join
-    end
-
     it 'should set Job#healthy to false if perform with error' do
       failing_job.perform.join
       expect(failing_job.healthy).to be false
     end
-
-    xit 'should set @_crono_job variable to instance' do
-      job.perform
-    end
   end
 
   describe '#description' do