diff --git a/.ruby-version b/.ruby-version
index 77fee73..005119b 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-1.9.3
+2.4.1
diff --git a/Gemfile b/Gemfile
index ed7c51a..fb45034 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 group :test do
-  gem 'cucumber'
+	gem 'cucumber', '~> 2.4.0'
   gem 'aruba'
-  gem 'thinp_xml'
+  gem 'thinp_xml', :path => "/home/ejt/work/RedHat/thinp_xml"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index d198286..08e49eb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,37 +1,53 @@
+PATH
+  remote: /home/ejt/work/RedHat/thinp_xml
+  specs:
+    thinp_xml (0.0.22)
+      ejt_command_line (>= 0.0.2)
+
 GEM
   remote: https://rubygems.org/
   specs:
-    aruba (0.6.1)
-      childprocess (>= 0.3.6)
-      cucumber (>= 1.1.1)
-      rspec-expectations (>= 2.7.0)
-    builder (3.2.2)
-    childprocess (0.5.3)
+    aruba (0.14.2)
+      childprocess (~> 0.5.6)
+      contracts (~> 0.9)
+      cucumber (>= 1.3.19)
+      ffi (~> 1.9.10)
+      rspec-expectations (>= 2.99)
+      thor (~> 0.19)
+    builder (3.2.3)
+    childprocess (0.5.9)
       ffi (~> 1.0, >= 1.0.11)
-    cucumber (1.3.16)
+    contracts (0.16.0)
+    cucumber (2.4.0)
       builder (>= 2.1.2)
+      cucumber-core (~> 1.5.0)
+      cucumber-wire (~> 0.0.1)
       diff-lcs (>= 1.1.3)
-      gherkin (~> 2.12)
+      gherkin (~> 4.0)
       multi_json (>= 1.7.5, < 2.0)
-      multi_test (>= 0.1.1)
-    diff-lcs (1.2.5)
+      multi_test (>= 0.1.2)
+    cucumber-core (1.5.0)
+      gherkin (~> 4.0)
+    cucumber-wire (0.0.1)
+    diff-lcs (1.3)
     ejt_command_line (0.0.4)
-    ffi (1.9.3)
-    gherkin (2.12.2)
-      multi_json (~> 1.3)
-    multi_json (1.10.1)
-    multi_test (0.1.1)
-    rspec-expectations (3.0.4)
+    ffi (1.9.18)
+    gherkin (4.1.3)
+    multi_json (1.12.1)
+    multi_test (0.1.2)
+    rspec-expectations (3.6.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.0.0)
-    rspec-support (3.0.4)
-    thinp_xml (0.0.20)
-      ejt_command_line (>= 0.0.2)
+      rspec-support (~> 3.6.0)
+    rspec-support (3.6.0)
+    thor (0.19.4)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   aruba
-  cucumber
-  thinp_xml
+  cucumber (~> 2.4.0)
+  thinp_xml!
+
+BUNDLED WITH
+   1.15.3
diff --git a/features/step_definitions/cache_steps.rb b/features/step_definitions/cache_steps.rb
index 7949cd0..c9d3841 100644
--- a/features/step_definitions/cache_steps.rb
+++ b/features/step_definitions/cache_steps.rb
@@ -7,7 +7,7 @@ end
 
 Given /^input without read permissions$/ do
   write_file(DEFAULT_INPUT, "\0" * 4096)
-  in_current_dir do
+	cd(".") do
     f = File.new(DEFAULT_INPUT)
     f.chmod(0000)
   end
@@ -18,7 +18,7 @@ Given(/^input file$/) do
 end
 
 Given(/^block (\d+) is zeroed$/) do |b|
-  in_current_dir do
+	cd(".") do
     File.open(DEFAULT_INPUT, 'w') do |f|
       f.seek(BLOCK_SIZE * b.to_i, IO::SEEK_SET)
       f.write("\0" * BLOCK_SIZE)
@@ -27,11 +27,11 @@ Given(/^block (\d+) is zeroed$/) do |b|
 end
 
 Then /^it should pass$/ do
-  assert_success(true)
+	expect(last_command_started).to be_successfully_executed
 end
 
 Then /^it should fail$/ do
-  assert_success(false)
+	expect(last_command_started).to_not be_successfully_executed
 end
 
 CACHE_USAGE =<<EOF
@@ -44,14 +44,15 @@ Options:
   {--super-block-only}
   {--skip-mappings}
   {--skip-hints}
+  {--skip-discards}
 EOF
 
 Then /^cache_usage to stdout$/ do
-  assert_partial_output(CACHE_USAGE, all_stdout)
+	expect(last_command_started).to have_output_on_stdout(CACHE_USAGE.chomp)
 end
 
 Then /^cache_usage to stderr$/ do
-  assert_partial_output(CACHE_USAGE, all_stderr)
+	expect(last_command_started).to have_output_on_stderr("No input file provided.\n" + CACHE_USAGE.chomp)
 end
 
 When(/^I run cache_check with (.*?)$/) do |opts|
@@ -79,7 +80,7 @@ When(/^I run cache_metadata_size$/) do
 end
 
 Given(/^valid cache metadata$/) do
-  in_current_dir do
+	cd(".") do
     system("cache_xml create --nr-cache-blocks uniform[1000..5000] --nr-mappings uniform[500..1000] > #{xml_file}")
     system("dd if=/dev/zero of=#{dev_file} bs=4k count=1024 > /dev/null")
   end
@@ -92,7 +93,7 @@ Then(/^cache dumps (\d+) and (\d+) should be identical$/) do |d1, d2|
 end
 
 Given(/^a small xml file$/) do
-  in_current_dir do
+	cd(".") do
     system("cache_xml create --nr-cache-blocks 3 --nr-mappings 3 --layout linear --dirty-percent 100 > #{xml_file}")
   end
 end
diff --git a/features/step_definitions/thin_steps.rb b/features/step_definitions/thin_steps.rb
index 39527f4..5f62a68 100644
--- a/features/step_definitions/thin_steps.rb
+++ b/features/step_definitions/thin_steps.rb
@@ -42,13 +42,13 @@ When(/^I run thin_restore with (.*?)$/) do |opts|
 end
 
 Then /^it should give no output$/ do
-  ps = only_processes.last
+  ps = all_commands.last
   output = ps.stdout + ps.stderr
-  output.should == ""
+	expect(output).to eq("")
 end
 
 Then(/^it should pass with version$/) do
-  only_processes.last.stdout.chomp.should == tools_version
+  expect(all_commands.last.stdout.chomp).to eq(tools_version)
 end
 
 When(/^I dump$/) do