diff --git a/src/EventManager.php b/src/EventManager.php
index 3f4c58f..de51b1e 100644
--- a/src/EventManager.php
+++ b/src/EventManager.php
@@ -462,10 +462,6 @@ protected function triggerListeners($event, EventInterface $e, $callback = null)
 
         foreach ($listeners as $listener) {
             $listenerCallback = $listener->getCallback();
-            if (!$listenerCallback) {
-                $this->detach($listener);
-                continue;
-            }
 
             // Trigger the listener's callback, and push its result onto the
             // response collection
diff --git a/test/EventManagerTest.php b/test/EventManagerTest.php
index 73af37d..380dc86 100644
--- a/test/EventManagerTest.php
+++ b/test/EventManagerTest.php
@@ -546,22 +546,6 @@ public function testTriggerCanTakeAnOptionalCallbackArgumentToEmulateTriggerUnti
         $this->assertTrue($responses->stopped());
     }
 
-    public function testWeakRefsAreHonoredWhenTriggering()
-    {
-        if (!class_exists('WeakRef', false)) {
-            $this->markTestSkipped('Requires pecl/weakref');
-        }
-
-        $functor = new TestAsset\Functor;
-        $this->events->attach('test', $functor);
-
-        unset($functor);
-
-        $result = $this->events->trigger('test', $this, array());
-        $message = $result->last();
-        $this->assertNull($message);
-    }
-
     public function testDuplicateIdentifiersAreNotRegistered()
     {
         $events = new EventManager(array(__CLASS__, get_class($this)));