1 files changed, 15 insertions, 0 deletions
diff --git a/test/openssl/test_config.rb b/test/openssl/test_config.rb
new file mode 100644
index 0000000000..9578bb2547
--- /dev/null
+++ b/test/openssl/test_config.rb
@@ -0,0 +1,15 @@
+require 'openssl'
+require "test/unit"
+
+class OpenSSL::TestConfig < Test::Unit::TestCase
+  def test_freeze
+    c = OpenSSL::Config.new
+    c['foo'] = [['key', 'value']]
+    c.freeze
+
+    # [ruby-core:18377]
+    assert_raise(RuntimeError, /frozen/) do
+      c['foo'] = [['key', 'wrong']]
+    end
+  end
+end