diff --git a/src/Symfony/Bridge/Monolog/Logger.php b/src/Symfony/Bridge/Monolog/Logger.php
index 7cd75c5ec11ca..d4771f2894d89 100644
--- a/src/Symfony/Bridge/Monolog/Logger.php
+++ b/src/Symfony/Bridge/Monolog/Logger.php
@@ -50,7 +50,7 @@ public function countErrors()
      */
     public function clear()
     {
-        if (($logger = $this->getDebugLogger()) && method_exists($logger, 'clear')) {
+        if ($logger = $this->getDebugLogger()) {
             $logger->clear();
         }
     }
diff --git a/src/Symfony/Component/EventDispatcher/CHANGELOG.md b/src/Symfony/Component/EventDispatcher/CHANGELOG.md
index cde9a680a53fa..e570303e742cc 100644
--- a/src/Symfony/Component/EventDispatcher/CHANGELOG.md
+++ b/src/Symfony/Component/EventDispatcher/CHANGELOG.md
@@ -5,6 +5,7 @@ CHANGELOG
 -----
 
  * removed the `ContainerAwareEventDispatcher` class
+ * added the `reset()` method to the `TraceableEventDispatcherInterface`
 
 3.4.0
 -----
diff --git a/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcherInterface.php b/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcherInterface.php
index f0212753be591..4adbe9693a787 100644
--- a/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcherInterface.php
+++ b/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcherInterface.php
@@ -15,8 +15,6 @@
 
 /**
  * @author Fabien Potencier <fabien@symfony.com>
- *
- * @method reset() Resets the trace.
  */
 interface TraceableEventDispatcherInterface extends EventDispatcherInterface
 {
@@ -33,4 +31,9 @@ public function getCalledListeners();
      * @return array An array of not called listeners
      */
     public function getNotCalledListeners();
+
+    /**
+     * Resets the trace.
+     */
+    public function reset();
 }
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DataCollectorInterface.php b/src/Symfony/Component/HttpKernel/DataCollector/DataCollectorInterface.php
index c0a0c0a982b3b..9e76a99fc52ff 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DataCollectorInterface.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DataCollectorInterface.php
@@ -18,8 +18,6 @@
  * DataCollectorInterface.
  *
  * @author Fabien Potencier <fabien@symfony.com>
- *
- * @method reset() Resets this data collector to its initial state.
  */
 interface DataCollectorInterface
 {
@@ -38,4 +36,9 @@ public function collect(Request $request, Response $response, \Exception $except
      * @return string The collector name
      */
     public function getName();
+
+    /**
+     * Resets this data collector to its initial state.
+     */
+    public function reset();
 }
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/EventDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/EventDataCollector.php
index ab44405edb2e7..e82a1fc19bb09 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/EventDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/EventDataCollector.php
@@ -27,9 +27,6 @@ class EventDataCollector extends DataCollector implements LateDataCollectorInter
 
     public function __construct(EventDispatcherInterface $dispatcher = null)
     {
-        if ($dispatcher instanceof TraceableEventDispatcherInterface && !method_exists($dispatcher, 'reset')) {
-            @trigger_error(sprintf('Implementing "%s" without the "reset()" method is deprecated since version 3.4 and will be unsupported in 4.0 for class "%s".', TraceableEventDispatcherInterface::class, \get_class($dispatcher)), E_USER_DEPRECATED);
-        }
         $this->dispatcher = $dispatcher;
     }
 
@@ -49,10 +46,6 @@ public function reset()
         $this->data = array();
 
         if ($this->dispatcher instanceof TraceableEventDispatcherInterface) {
-            if (!method_exists($this->dispatcher, 'reset')) {
-                return; // @deprecated
-            }
-
             $this->dispatcher->reset();
         }
     }
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
index ee645d53e8fdb..f1df6e2d7e0eb 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
@@ -29,10 +29,6 @@ class LoggerDataCollector extends DataCollector implements LateDataCollectorInte
     public function __construct($logger = null, $containerPathPrefix = null)
     {
         if (null !== $logger && $logger instanceof DebugLoggerInterface) {
-            if (!method_exists($logger, 'clear')) {
-                @trigger_error(sprintf('Implementing "%s" without the "clear()" method is deprecated since version 3.4 and will be unsupported in 4.0 for class "%s".', DebugLoggerInterface::class, \get_class($logger)), E_USER_DEPRECATED);
-            }
-
             $this->logger = $logger;
         }
 
@@ -52,7 +48,7 @@ public function collect(Request $request, Response $response, \Exception $except
      */
     public function reset()
     {
-        if ($this->logger && method_exists($this->logger, 'clear')) {
+        if ($this->logger instanceof DebugLoggerInterface) {
             $this->logger->clear();
         }
         $this->data = array();
diff --git a/src/Symfony/Component/HttpKernel/Log/DebugLoggerInterface.php b/src/Symfony/Component/HttpKernel/Log/DebugLoggerInterface.php
index f0606d3b0e5ee..1d955c48296ae 100644
--- a/src/Symfony/Component/HttpKernel/Log/DebugLoggerInterface.php
+++ b/src/Symfony/Component/HttpKernel/Log/DebugLoggerInterface.php
@@ -15,8 +15,6 @@
  * DebugLoggerInterface.
  *
  * @author Fabien Potencier <fabien@symfony.com>
- *
- * @method clear() Removes all log records.
  */
 interface DebugLoggerInterface
 {
@@ -37,4 +35,9 @@ public function getLogs();
      * @return int The number of errors
      */
     public function countErrors();
+
+    /**
+     * Removes all log records.
+     */
+    public function clear();
 }
diff --git a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
index 85a71641be6fe..c99e7113fc88f 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
@@ -198,10 +198,6 @@ public function collect(Request $request, Response $response, \Exception $except
     public function reset()
     {
         foreach ($this->collectors as $collector) {
-            if (!method_exists($collector, 'reset')) {
-                continue;
-            }
-
             $collector->reset();
         }
         $this->enabled = $this->initiallyEnabled;
@@ -237,10 +233,6 @@ public function set(array $collectors = array())
      */
     public function add(DataCollectorInterface $collector)
     {
-        if (!method_exists($collector, 'reset')) {
-            @trigger_error(sprintf('Implementing "%s" without the "reset()" method is deprecated since version 3.4 and will be unsupported in 4.0 for class "%s".', DataCollectorInterface::class, \get_class($collector)), E_USER_DEPRECATED);
-        }
-
         $this->collectors[$collector->getName()] = $collector;
     }