1 files changed, 3 insertions, 8 deletions
diff --git a/spec/ruby/core/mutex/lock_spec.rb b/spec/ruby/core/mutex/lock_spec.rb
index 98deabe056..b5c2b168e8 100644
--- a/spec/ruby/core/mutex/lock_spec.rb
+++ b/spec/ruby/core/mutex/lock_spec.rb
@@ -33,14 +33,9 @@ describe "Mutex#lock" do
   # related to this ML thread.
   it "raises a ThreadError when used recursively" do
     m = Mutex.new
-
-    th = Thread.new do
-      m.lock
+    m.lock
+    -> {
       m.lock
-    end
-
-    lambda do
-      th.join
-    end.should raise_error(ThreadError)
+    }.should raise_error(ThreadError)
   end
 end