diff --git a/lib/em-synchrony.rb b/lib/em-synchrony.rb
index 7f61009..2e2b403 100644
--- a/lib/em-synchrony.rb
+++ b/lib/em-synchrony.rb
@@ -12,14 +12,15 @@
 require "em-synchrony/connection_pool"
 
 module EventMachine
-  
+
   # A convenience method for wrapping EM.run body within
   # a Ruby Fiber such that async operations can be transparently
   # paused and resumed based on IO scheduling.
   def self.synchrony(blk=nil, tail=nil, &block)
-    Fiber.new {
-      self.run(blk, tail, &block)
-    }.resume
+    blk ||= block
+    context = Proc.new { Fiber.new { blk.call }.resume }
+
+    self.run(context, tail)
   end
-  
+
 end
diff --git a/spec/http_spec.rb b/spec/http_spec.rb
index e077852..38273dd 100644
--- a/spec/http_spec.rb
+++ b/spec/http_spec.rb
@@ -5,51 +5,45 @@
 
 describe EventMachine::HttpRequest do
   it "should fire sequential requests" do
-    EventMachine.run do
-
-      Fiber.new {
-        @s = StubServer.new("HTTP/1.0 200 OK\r\nConnection: close\r\n\r\nFoo", DELAY)
-        
-        start = now
-        order = []
-        order.push :get  if EventMachine::HttpRequest.new(URL).get
-        order.push :post if EventMachine::HttpRequest.new(URL).post
-        order.push :head if EventMachine::HttpRequest.new(URL).head
-        order.push :post if EventMachine::HttpRequest.new(URL).delete
-        order.push :put  if EventMachine::HttpRequest.new(URL).put
-
-        (now - start.to_f).should be_within(DELAY * order.size * 0.15).of(DELAY * order.size)
-        order.should == [:get, :post, :head, :post, :put]
-
-        @s.stop
-        EventMachine.stop
-      }.resume
+    EventMachine.synchrony do
+      s = StubServer.new("HTTP/1.0 200 OK\r\nConnection: close\r\n\r\nFoo", DELAY)
+
+      start = now
+      order = []
+      order.push :get  if EventMachine::HttpRequest.new(URL).get
+      order.push :post if EventMachine::HttpRequest.new(URL).post
+      order.push :head if EventMachine::HttpRequest.new(URL).head
+      order.push :post if EventMachine::HttpRequest.new(URL).delete
+      order.push :put  if EventMachine::HttpRequest.new(URL).put
+
+      (now - start.to_f).should be_within(DELAY * order.size * 0.15).of(DELAY * order.size)
+      order.should == [:get, :post, :head, :post, :put]
+
+      s.stop
+      EventMachine.stop
     end
   end
 
   it "should fire simultaneous requests via Multi interface" do
-    EventMachine.run do
-
-      Fiber.new {
-        @s = StubServer.new("HTTP/1.0 200 OK\r\nConnection: close\r\n\r\nFoo", DELAY)
-        
-        start = now
-
-        multi = EventMachine::Synchrony::Multi.new
-        multi.add :a, EventMachine::HttpRequest.new(URL).aget
-        multi.add :b, EventMachine::HttpRequest.new(URL).apost
-        multi.add :c, EventMachine::HttpRequest.new(URL).ahead
-        multi.add :d, EventMachine::HttpRequest.new(URL).adelete
-        multi.add :e, EventMachine::HttpRequest.new(URL).aput
-        res = multi.perform
-        
-        (now - start.to_f).should be_within(DELAY * 0.15).of(DELAY)
-        res.responses[:callback].size.should == 5
-        res.responses[:errback].size.should == 0
-
-        @s.stop
-        EventMachine.stop
-      }.resume
+    EventMachine.synchrony do
+      s = StubServer.new("HTTP/1.0 200 OK\r\nConnection: close\r\n\r\nFoo", DELAY)
+
+      start = now
+
+      multi = EventMachine::Synchrony::Multi.new
+      multi.add :a, EventMachine::HttpRequest.new(URL).aget
+      multi.add :b, EventMachine::HttpRequest.new(URL).apost
+      multi.add :c, EventMachine::HttpRequest.new(URL).ahead
+      multi.add :d, EventMachine::HttpRequest.new(URL).adelete
+      multi.add :e, EventMachine::HttpRequest.new(URL).aput
+      res = multi.perform
+
+      (now - start.to_f).should be_within(DELAY * 0.15).of(DELAY)
+      res.responses[:callback].size.should == 5
+      res.responses[:errback].size.should == 0
+
+      s.stop
+      EventMachine.stop
     end
   end
 end