diff --git a/core_search_facets/src/Tests/IntegrationTest.php b/core_search_facets/src/Tests/IntegrationTest.php
index 34536d2..dc497cd 100644
--- a/core_search_facets/src/Tests/IntegrationTest.php
+++ b/core_search_facets/src/Tests/IntegrationTest.php
@@ -120,7 +120,28 @@ class IntegrationTest extends WebTestBase {
 
     $this->createFacetBlock($id);
 
+    // Assert date facets.
     $this->drupalGet('search/node', ['query' => ['keys' => 'test']]);
+    $this->assertLink('March 2016');
+    $this->assertLink('April 2016');
+    $this->assertResponse(200);
+
+    $this->clickLink('March 2016');
+    $this->assertResponse(200);
+    $this->assertLink('March 8, 2016');
+    $this->assertLink('March 9, 2016');
+
+    $this->clickLink('March 9, 2016');
+    $this->assertResponse(200);
+    $this->assertLink('10 PM');
+    $this->assertLink('12 PM');
+
+    $this->drupalGet('search/node', ['query' => ['keys' => 'test']]);
+    $this->assertLink('April 2016');
+    $this->clickLink('April 2016');
+    $this->assertResponse(200);
+    $this->assertLink('April 1, 2016');
+    $this->assertLink('April 2, 2016');
   }
 
   /**
diff --git a/core_search_facets/src/Tests/WebTestBase.php b/core_search_facets/src/Tests/WebTestBase.php
index a911de5..450acc8 100644
--- a/core_search_facets/src/Tests/WebTestBase.php
+++ b/core_search_facets/src/Tests/WebTestBase.php
@@ -59,20 +59,31 @@ abstract class WebTestBase extends SimpletestWebTestBase {
     $this->drupalCreateContentType(['type' => 'article']);
 
     // Adding 10 pages.
-    for ($i = 0; $i < 10; $i++) {
+    for ($i = 1; $i <= 9; $i++) {
+      $created_time = new \DateTime('March '.$i.' 2016 ' . $i . 'PM');
       $this->drupalCreateNode(array(
         'title' => 'foo bar' . $i,
         'body' => 'test page' . $i,
         'type' => 'page',
+        'created' => $created_time->format('U'),
       ));
     }
+    $created_time = new \DateTime('March 9 2016 11PM');
+    $this->drupalCreateNode(array(
+      'title' => 'foo bar10',
+      'body' => 'test page10',
+      'type' => 'page',
+      'created' => $created_time->format('U'),
+    ));
 
     // Adding 10 articles.
-    for ($i = 0; $i < 10; $i++) {
+    for ($i = 1; $i <= 10; $i++) {
+      $created_time = new \DateTime('April '.$i.' 2016 ' . $i . 'AM');
       $this->drupalCreateNode(array(
         'title' => 'foo baz' . $i,
         'body' => 'test article' . $i,
         'type' => 'article',
+        'created' => $created_time->format('U'),
       ));
     }