diff --git a/webprofiler/src/DataCollector/DrupalDataCollectorTrait.php b/webprofiler/src/DataCollector/DrupalDataCollectorTrait.php
index 98a3faf462b8a103a24b8695dcb4e4b65ff07b68..a523644a6d758785d578c4b777f9fbe27be1dc2e 100644
--- a/webprofiler/src/DataCollector/DrupalDataCollectorTrait.php
+++ b/webprofiler/src/DataCollector/DrupalDataCollectorTrait.php
@@ -7,6 +7,13 @@ namespace Drupal\webprofiler\DataCollector;
  */
 trait DrupalDataCollectorTrait {
 
+  /**
+   * {@inheritdoc}
+   */
+  public function reset() {
+    $this->data = array();
+  }
+
   /**
    * {@inheritdoc}
    */
diff --git a/webprofiler/src/DataCollector/RequestDataCollector.php b/webprofiler/src/DataCollector/RequestDataCollector.php
index 9de8f4942f1d6be5d11136d8c9f38b384cc8b55d..229a632ee9e95fc135699572e5d8e03546ce35d3 100644
--- a/webprofiler/src/DataCollector/RequestDataCollector.php
+++ b/webprofiler/src/DataCollector/RequestDataCollector.php
@@ -52,6 +52,8 @@ class RequestDataCollector extends BaseRequestDataCollector implements DrupalDat
    * @param $service_id
    * @param $callable
    * @param $request
+   *
+   * @throws \ReflectionException
    */
   public function addAccessCheck($service_id, $callable, Request $request) {
     $this->accessCheck[$request->getPathInfo()][] = [
@@ -60,6 +62,19 @@ class RequestDataCollector extends BaseRequestDataCollector implements DrupalDat
     ];
   }
 
+  /**
+   * {@inheritdoc}
+   *
+   * In Symfony 3 the data for the RequestDataCollector are converted to string
+   * with \Symfony\Component\HttpKernel\DataCollector/DataCollector::cloneVar()
+   * in
+   * \Symfony\Component\HttpKernel\DataCollector\RequestDataCollector::lateCollect(),
+   * but for some reasons they aren't unserialized back to array later. At the
+   * moment we simply override that method to avoid conversion.
+   */
+  public function lateCollect() {
+  }
+
   /**
    * {@inheritdoc}
    */
@@ -71,7 +86,7 @@ class RequestDataCollector extends BaseRequestDataCollector implements DrupalDat
    * {@inheritdoc}
    */
   public function getPanelSummary() {
-    return $this->data['status_code'].' '.$this->data['status_text'];
+    return $this->data['status_code'] . ' ' . $this->data['status_text'];
   }
 
   /**