diff --git a/examples/halt.rb b/examples/halt.rb
index a9b95e76..fa56a181 100755
--- a/examples/halt.rb
+++ b/examples/halt.rb
@@ -56,7 +56,7 @@ def run
   end
 end
 
-if $0 == __FILE__
+if $PROGRAM_NAME == __FILE__
   puts example_description
 
   ExampleHelper.world.action_logger.level = Logger::DEBUG
diff --git a/lib/dynflow/director.rb b/lib/dynflow/director.rb
index 915a1491..45b813cb 100644
--- a/lib/dynflow/director.rb
+++ b/lib/dynflow/director.rb
@@ -335,7 +335,7 @@ def track_execution_plan(execution_plan_id, finished)
       if @world.coordinator.find_records(filters).any?
         halt_execution(execution_plan_id)
         raise Dynflow::Error,
-              "cannot execute execution_plan_id:#{execution_plan_id} it's execution is inhibited"
+          "cannot execute execution_plan_id:#{execution_plan_id} it's execution is inhibited"
       end
 
       @execution_plan_managers[execution_plan_id] =
diff --git a/lib/dynflow/world.rb b/lib/dynflow/world.rb
index 8779cb05..0f3b5f07 100644
--- a/lib/dynflow/world.rb
+++ b/lib/dynflow/world.rb
@@ -4,6 +4,7 @@
 require 'dynflow/world/invalidation'
 
 module Dynflow
+  # rubocop:disable Metrics/ClassLength
   class World
     include Algebrick::TypeCheck
     include Algebrick::Matching
@@ -395,4 +396,5 @@ def spawn_and_wait(klass, name, *args)
       return actor
     end
   end
+  # rubocop:enable Metrics/ClassLength
 end
diff --git a/test/executor_test.rb b/test/executor_test.rb
index 0ebc84e8..3ade6400 100644
--- a/test/executor_test.rb
+++ b/test/executor_test.rb
@@ -768,7 +768,7 @@ def assert_next_steps(expected_next_step_ids, finished_step_id = nil, success =
         end
 
         it 'halts a scheduled execution plan' do
-          plan = world.delay(Support::DummyExample::Dummy, {start_at: Time.now + 120})
+          plan = world.delay(Support::DummyExample::Dummy, { start_at: Time.now + 120 })
           wait_for do
             plan = world.persistence.load_execution_plan(plan.id)
             plan.state == :scheduled