diff --git a/spec/acceptance/01_zookeeper_spec.rb b/spec/acceptance/01_zookeeper_spec.rb
index e2b8f31..ae3e369 100644
--- a/spec/acceptance/01_zookeeper_spec.rb
+++ b/spec/acceptance/01_zookeeper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper_acceptance'
 
 describe 'zookeeper prereq' do
diff --git a/spec/acceptance/broker_spec.rb b/spec/acceptance/broker_spec.rb
index 4b9136f..539ceee 100644
--- a/spec/acceptance/broker_spec.rb
+++ b/spec/acceptance/broker_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper_acceptance'
 
 case fact('osfamily')
diff --git a/spec/acceptance/consumer_spec.rb b/spec/acceptance/consumer_spec.rb
index 812abff..e33d3d5 100644
--- a/spec/acceptance/consumer_spec.rb
+++ b/spec/acceptance/consumer_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper_acceptance'
 
 case fact('osfamily')
diff --git a/spec/acceptance/init_spec.rb b/spec/acceptance/init_spec.rb
index df552dc..98c7c47 100644
--- a/spec/acceptance/init_spec.rb
+++ b/spec/acceptance/init_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper_acceptance'
 
 case fact('osfamily')
diff --git a/spec/acceptance/mirror_spec.rb b/spec/acceptance/mirror_spec.rb
index 443d144..95db8ca 100644
--- a/spec/acceptance/mirror_spec.rb
+++ b/spec/acceptance/mirror_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper_acceptance'
 
 case fact('osfamily')
diff --git a/spec/classes/broker_spec.rb b/spec/classes/broker_spec.rb
index 0c3d309..e562376 100644
--- a/spec/classes/broker_spec.rb
+++ b/spec/classes/broker_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 require 'shared_examples_param_validation'
 
@@ -37,7 +39,8 @@
         context 'defaults' do
           it { is_expected.to contain_file('/opt/kafka/config/server.properties') }
         end
-        context 'with  manage_log4j => true' do
+
+        context 'with manage_log4j => true' do
           let(:params) { { 'manage_log4j' => true } }
 
           it { is_expected.to contain_file('/opt/kafka/config/log4j.properties').with_content(%r{^log4j.appender.kafkaAppender.MaxFileSize=50MB$}) }
diff --git a/spec/classes/consumer_spec.rb b/spec/classes/consumer_spec.rb
index 137972e..6e79fe3 100644
--- a/spec/classes/consumer_spec.rb
+++ b/spec/classes/consumer_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 require 'shared_examples_param_validation'
 
@@ -38,7 +40,8 @@
         context 'defaults' do
           it { is_expected.to contain_file('/opt/kafka/config/consumer.properties') }
         end
-        context 'with  manage_log4j => true' do
+
+        context 'with manage_log4j => true' do
           let(:params) { { 'manage_log4j' => true } }
 
           it { is_expected.to contain_file('/opt/kafka/config/log4j.properties').with_content(%r{^log4j.appender.kafkaAppender.MaxFileSize=50MB$}) }
diff --git a/spec/classes/init_spec.rb b/spec/classes/init_spec.rb
index 1edd6d7..4caea36 100644
--- a/spec/classes/init_spec.rb
+++ b/spec/classes/init_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'kafka', type: :class do
diff --git a/spec/classes/mirror_spec.rb b/spec/classes/mirror_spec.rb
index e76caf5..73aa183 100644
--- a/spec/classes/mirror_spec.rb
+++ b/spec/classes/mirror_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 require 'shared_examples_param_validation'
 
diff --git a/spec/classes/producer_spec.rb b/spec/classes/producer_spec.rb
index 1a87df3..37624f3 100644
--- a/spec/classes/producer_spec.rb
+++ b/spec/classes/producer_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 require 'shared_examples_param_validation'
 
diff --git a/spec/defines/topic_spec.rb b/spec/defines/topic_spec.rb
index 8fe4942..cb90e50 100644
--- a/spec/defines/topic_spec.rb
+++ b/spec/defines/topic_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'kafka::topic', type: :define do
diff --git a/spec/shared_examples_param_validation.rb b/spec/shared_examples_param_validation.rb
index dd718cf..f808b76 100644
--- a/spec/shared_examples_param_validation.rb
+++ b/spec/shared_examples_param_validation.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 RSpec.configure do |c|
   c.alias_it_should_behave_like_to :it_validates_parameter, 'validates parameter:'
diff --git a/spec/spec_helper_acceptance.rb b/spec/spec_helper_acceptance.rb
index f5f5960..5c2b9e9 100644
--- a/spec/spec_helper_acceptance.rb
+++ b/spec/spec_helper_acceptance.rb
@@ -1,7 +1,10 @@
+# frozen_string_literal: true
+
 require 'voxpupuli/acceptance/spec_helper_acceptance'
 
 configure_beaker do |host|
   next unless fact('os.name') == 'Debian' && fact('os.release.major') == '8'
+
   on host, 'echo "deb http://archive.debian.org/debian jessie-backports main" > /etc/apt/sources.list.d/backports.list'
   on host, 'echo \'Acquire::Check-Valid-Until "false";\' > /etc/apt/apt.conf.d/check-valid'
   on host, 'DEBIAN_FRONTEND=noninteractive apt-get -y update'