1 files changed, 5 insertions, 0 deletions
diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 7c384c19bd..02c3967022 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -465,6 +465,11 @@ class TestISeq < Test::Unit::TestCase
         attr_reader :i
       end
     end;
+
+    # cleanup
+    ::Object.class_eval do
+      remove_const :P
+    end
   end
 
   def collect_from_binary_tracepoint_lines(tracepoint_type, filename)