Fix Module#name news and add a test

2 files changed, 6 insertions, 2 deletions

diff --git a/NEWS b/NEWS
index 9010d5dd05..dd461a3131 100644
--- a/NEWS
+++ b/NEWS
@@ -176,8 +176,8 @@ Module::
       Module#const_defined?.  [Feature #15777]
 
     * Module#name now always return a frozen String. The returned String is
-      always the same for a given Module. This change is experimental
-      [Feature #16150]
+      always the same for a given Module. This change is
+      experimental. [Feature #16150]
 
 ObjectSpace::WeakMap::
 
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 8689c60dcd..8b95ecedc4 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -563,6 +563,10 @@ class TestModule < Test::Unit::TestCase
     assert_equal("Integer", Integer.name)
     assert_equal("TestModule::Mixin",  Mixin.name)
     assert_equal("TestModule::User",   User.name)
+
+    assert_predicate Integer.name, :frozen?
+    assert_predicate Mixin.name, :frozen?
+    assert_predicate User.name, :frozen?
   end
 
   def test_accidental_singleton_naming_with_module