1 files changed, 7 insertions, 3 deletions
diff --git a/test/optparse/test_bash_completion.rb b/test/optparse/test_bash_completion.rb
index baeb6d9882..60c82f7136 100644
--- a/test/optparse/test_bash_completion.rb
+++ b/test/optparse/test_bash_completion.rb
@@ -1,9 +1,8 @@
+# frozen_string_literal: false
 require 'test/unit'
 require 'optparse'
 
-class TestOptionParser < Test::Unit::TestCase
-end
-class TestOptionParser::BashCompletion < Test::Unit::TestCase
+class TestOptionParserBashCompletion < Test::Unit::TestCase
   def setup
     @opt = OptionParser.new
     @opt.define("-z", "zzz") {}
@@ -39,4 +38,9 @@ class TestOptionParser::BashCompletion < Test::Unit::TestCase
   def test_long_for_option_complete
     assert_equal(%w[hello help], @opt.candidate("--for=h"))
   end
+
+  def test_case_sensitive
+    @opt.define("-Z") {}
+    assert_equal(%w[-z], @opt.candidate("-z"))
+  end
 end