1 files changed, 13 insertions, 0 deletions
diff --git a/test/ruby/test_box.rb b/test/ruby/test_box.rb
index 2e4e07a86a..1daf5d57d5 100644
--- a/test/ruby/test_box.rb
+++ b/test/ruby/test_box.rb
@@ -823,4 +823,17 @@ class TestBox < Test::Unit::TestCase
       assert_equal 42, b.eval('1+2')
     end;
   end
+
+  def test_loaded_extension_deleted_in_user_box
+    require 'tmpdir'
+    Dir.mktmpdir do |tmpdir|
+      env = ENV_ENABLE_BOX.merge({'TMPDIR'=>tmpdir})
+      assert_separately([env], __FILE__, __LINE__, "#{<<~"begin;"}\n#{<<~'end;'}", ignore_stderr: true)
+      begin;
+        require "json"
+        tmpdirname = ENV['TMPDIR']
+        assert_empty(Dir.children(tmpdirname))
+      end;
+    end
+  end
 end