1 files changed, 1 insertions, 0 deletions
diff --git a/lib/pp.rb b/lib/pp.rb
index 81a453d9ab..b0dcf8694b 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -541,6 +541,7 @@ if __FILE__ == $0
       a.instance_eval { @a = nil }
       result = PP.pp(a, '')
       assert_equal("#{a.inspect}\n", result)
+      a.instance_eval { remove_instance_variable("@a") }
     end
     
     def test_to_s_without_iv