1 files changed, 14 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/module/synchronization_test.rb b/activesupport/test/core_ext/module/synchronization_test.rb
index 78be6b725f..fe0f3b1a3b 100644
--- a/activesupport/test/core_ext/module/synchronization_test.rb
+++ b/activesupport/test/core_ext/module/synchronization_test.rb
@@ -54,4 +54,18 @@ class SynchronizationTest < Test::Unit::TestCase
     @instance.to_s
     assert_equal 2, dummy.sync_count
   end
+
+  def test_can_synchronize_method_with_punctuation
+    @target.module_eval do
+      def dangerous?
+        @dangerous
+      end
+      def dangerous!
+        @dangerous = true
+      end
+    end
+    @target.synchronize :dangerous?, :dangerous!, :with => :mutex
+    @instance.dangerous!
+    assert @instance.dangerous?
+  end
 end
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