diff --git a/Gemfile b/Gemfile
index 2d0066e..8770271 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,6 +5,7 @@ source 'https://rubygems.org'
 # Specify your gem's dependencies in repl_type_completor.gemspec
 gemspec
 
+gem 'irb', '>= 1.10.0'
 gem 'rake', '~> 13.0'
 gem 'test-unit'
 gem 'test-unit-ruby-core'
diff --git a/test/repl_type_completor/test_require_paths.rb b/test/repl_type_completor/test_require_paths.rb
index 331c75a..8d2f248 100644
--- a/test/repl_type_completor/test_require_paths.rb
+++ b/test/repl_type_completor/test_require_paths.rb
@@ -9,6 +9,7 @@ def test_require_paths
       assert_include ReplTypeCompletor::RequirePaths.require_completions('repl_type_com'), 'repl_type_completor'
       assert_include ReplTypeCompletor::RequirePaths.require_completions('repl_type_com'), 'repl_type_completor/version'
       assert_equal ['repl_type_completor/version'], ReplTypeCompletor::RequirePaths.require_completions('repl_type_completor/vers')
+      assert_equal 1, ReplTypeCompletor::RequirePaths.require_completions('ir').tally['irb']
     end
 
     def test_require_relative_paths