diff --git a/Gemfile b/Gemfile
index 1ded3d321..611a39a33 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,6 +18,7 @@ group :test do
   gem 'rubocop', '~> 0.36.0'
   gem 'simplecov', '~> 0.10'
   gem 'concurrent-ruby', '~> 0.9'
+  gem 'mocha', '~> 1.1'
 end
 
 group :integration do
diff --git a/inspec.gemspec b/inspec.gemspec
index a9690cb77..4d627a849 100644
--- a/inspec.gemspec
+++ b/inspec.gemspec
@@ -36,6 +36,4 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'hashie', '~> 3.4'
   spec.add_dependency 'molinillo', '~> 0'
   spec.add_dependency 'sslshake', '~> 1'
-
-  spec.add_development_dependency 'mocha', '~> 1.1'
 end