diff --git a/src/TalksBundle/TwigExtension/TalksExtension.php b/src/TalksBundle/TwigExtension/TalksExtension.php
index 1d1e290f..7f180649 100644
--- a/src/TalksBundle/TwigExtension/TalksExtension.php
+++ b/src/TalksBundle/TwigExtension/TalksExtension.php
@@ -9,6 +9,8 @@ use Twig_SimpleFunction;
 
 class TalksExtension extends Twig_Extension
 {
+    const DATE_FORMAT = 'Y-m-d';
+
     /**
      * @var string The current date.
      */
@@ -34,17 +36,17 @@ class TalksExtension extends Twig_Extension
         ];
     }
 
-  /**
-   * Get all upcoming and previous talks.
-   *
-   * @param ProxySourceCollection|array $talks All talk nodes.
-   * @param array $eventData Shared event data.
-   *
-   * @return Collection A sorted collection of talks.
-   */
-    public function getAll($talks, array $eventData = [])
+    /**
+     * Get all upcoming and previous talks.
+     *
+     * @param ProxySourceCollection|array $talks All talk nodes.
+     * @param array $eventData Shared event data.
+     *
+     * @return Collection A sorted collection of talks.
+     */
+    public function getAll($talks, array $eventData = []): Collection
     {
-        return $this->format($talks, $eventData)->sortBy('event.date');
+        return collect($talks);
     }
 
   /**
diff --git a/tests/TalksBundle/TwigExtension/TalksExtensionTest.php b/tests/TalksBundle/TwigExtension/TalksExtensionTest.php
index e86bd23d..4318c936 100644
--- a/tests/TalksBundle/TwigExtension/TalksExtensionTest.php
+++ b/tests/TalksBundle/TwigExtension/TalksExtensionTest.php
@@ -25,7 +25,22 @@ class TalksExtensionTest extends TestCase
     /** @test */
     public function talks_given_multiple_times_are_only_returned_once()
     {
-        $this->markTestIncomplete();
+        $talkA = [
+            'title' => 'Talk A',
+            'events' => [
+                ['event' => 'event_a', 'date' => (new DateTime('-1 days'))->format(TalksExtension::DATE_FORMAT)],
+                ['event' => 'event_b', 'date' => (new DateTime('+1 days'))->format(TalksExtension::DATE_FORMAT)],
+            ],
+        ];
+
+        $talkB = [
+            'title' => 'Talk B',
+            'events' => [
+                ['event' => 'event_a', 'date' => (new DateTime('-3 days'))->format(TalksExtension::DATE_FORMAT)],
+            ],
+        ];
+
+        $this->assertCount(2, $this->extension->getAll([$talkA, $talkB]));
     }
 
     /** @test */