use pry-byebug gem instead for pry (recommended for ruby 2.x)

.rspec

@@ -1,6 +1,2 @@
 --color
 --format NyanCatWideFormatter
-
---require spec_helper
---order random
---format documentation

Gemfile

@@ -18,7 +18,7 @@ gem 'ims-lti'
 gem 'kramdown'
 gem 'newrelic_rpm'
 gem 'pg', platform: :ruby
-gem 'pry'
+gem 'pry-byebug'
 gem 'puma', '~> 2.15.3'
 gem 'pundit'
 gem 'rails', '~> 4.1.13'

Gemfile.lock

@@ -190,6 +190,9 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
       spoon (~> 0.0)
+    pry-byebug (3.3.0)
+      byebug (~> 8.0)
+      pry (~> 0.10)
     puma (2.15.3)
     puma (2.15.3-java)
     pundit (1.1.0)
@@ -324,6 +327,7 @@ GEM
       json (>= 1.8.0)
     unf (0.1.4)
       unf_ext
+    unf (0.1.4-java)
     unf_ext (0.0.7.1)
     unicode-display_width (0.3.1)
     web-console (2.3.0)
@@ -380,7 +384,7 @@ DEPENDENCIES
   nokogiri
   nyan-cat-formatter
   pg
-  pry
+  pry-byebug
   puma (~> 2.15.3)
   pundit
   rails (~> 4.1.13)
@@ -406,3 +410,6 @@ DEPENDENCIES
   uglifier (>= 1.3.0)
   web-console (~> 2.0)
   will_paginate (~> 3.0)
+
+BUNDLED WITH
+   1.12.4

lib/docker_client.rb

@@ -191,6 +191,7 @@ class DockerClient
     container.port_bindings.values.each { |port| PortPool.release(port) }
     clean_container_workspace(container)
     if(container)
+      binding.pry
       container.delete(force: true, v: true)
     end
   rescue Docker::Error::NotFoundError => error

spec/spec_helper.rb

@@ -15,6 +15,7 @@
 #
 # See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
 
+
 unless RUBY_PLATFORM == 'java'
   if ENV['CODECLIMATE_REPO_TOKEN']
     require 'codeclimate-test-reporter'