diff --git a/test/irb/test_completion.rb b/test/irb/test_completion.rb
index c3462f419..1ae1b7a0b 100644
--- a/test/irb/test_completion.rb
+++ b/test/irb/test_completion.rb
@@ -69,8 +69,8 @@ def test_complete_require
     end
 
     def test_complete_require_library_name_first
-      candidates = IRB::InputCompletor::CompletionProc.("'cgi", "require ", "")
-      assert_equal candidates.first, "'cgi"
+      candidates = IRB::InputCompletor::CompletionProc.("'csv", "require ", "")
+      assert_equal candidates.first, "'csv"
     end
 
     def test_complete_require_relative