diff --git a/test/irb/test_color.rb b/test/irb/test_color.rb
index 2b43b2cd32..cf09f8500f 100644
--- a/test/irb/test_color.rb
+++ b/test/irb/test_color.rb
@@ -55,7 +55,7 @@ module TestIRB
         /reg/ => true,
         Object.new => false,
         Struct => true,
-        Test => true, 
+        Test => true,
         Struct.new(:a) => false,
         Struct.new(:a).new(1) => false,
       }.each do |object, result|