diff --git a/src/Wallabag/CoreBundle/Entity/Tag.php b/src/Wallabag/CoreBundle/Entity/Tag.php
index 6588785bf..ed4298adf 100644
--- a/src/Wallabag/CoreBundle/Entity/Tag.php
+++ b/src/Wallabag/CoreBundle/Entity/Tag.php
@@ -45,7 +45,7 @@ class Tag
 
     /**
      * @Expose
-     * @Gedmo\Slug(fields={"label"})
+     * @Gedmo\Slug(fields={"label"}, prefix="t:")
      * @ORM\Column(length=128, unique=true)
      */
     private $slug;
diff --git a/tests/Wallabag/CoreBundle/Controller/ExportControllerTest.php b/tests/Wallabag/CoreBundle/Controller/ExportControllerTest.php
index 5739559e4..b11997f68 100644
--- a/tests/Wallabag/CoreBundle/Controller/ExportControllerTest.php
+++ b/tests/Wallabag/CoreBundle/Controller/ExportControllerTest.php
@@ -124,7 +124,7 @@ class ExportControllerTest extends WallabagCoreTestCase
         $this->assertSame('binary', $headers->get('content-transfer-encoding'));
 
         ob_start();
-        $crawler = $client->request('GET', '/export/tag_entries.pdf?tag=foo-bar');
+        $crawler = $client->request('GET', '/export/tag_entries.pdf?tag=t:foo-bar');
         ob_end_clean();
 
         $this->assertSame(200, $client->getResponse()->getStatusCode());
diff --git a/tests/Wallabag/CoreBundle/Controller/FeedControllerTest.php b/tests/Wallabag/CoreBundle/Controller/FeedControllerTest.php
index b655c445a..6f5c47c48 100644
--- a/tests/Wallabag/CoreBundle/Controller/FeedControllerTest.php
+++ b/tests/Wallabag/CoreBundle/Controller/FeedControllerTest.php
@@ -250,29 +250,29 @@ class FeedControllerTest extends WallabagCoreTestCase
         $client = $this->getTestClient();
 
         // tag foo - without sort
-        $crawler = $client->request('GET', '/feed/admin/SUPERTOKEN/tags/foo');
+        $crawler = $client->request('GET', '/feed/admin/SUPERTOKEN/tags/t:foo');
         $this->assertSame(200, $client->getResponse()->getStatusCode());
         $this->assertSame('test title entry4', $crawler->filterXPath('//feed/entry[1]/title')->text());
         $this->assertSame('test title entry1', $crawler->filterXPath('//feed/entry[2]/title')->text());
 
         // tag foo - with sort created
-        $crawler = $client->request('GET', '/feed/admin/SUPERTOKEN/tags/foo?sort=created');
+        $crawler = $client->request('GET', '/feed/admin/SUPERTOKEN/tags/t:foo?sort=created');
         $this->assertSame(200, $client->getResponse()->getStatusCode());
         $this->assertSame('test title entry4', $crawler->filterXPath('//feed/entry[1]/title')->text());
         $this->assertSame('test title entry1', $crawler->filterXPath('//feed/entry[2]/title')->text());
 
         // tag foo - with sort updated
-        $crawler = $client->request('GET', '/feed/admin/SUPERTOKEN/tags/foo?sort=updated');
+        $crawler = $client->request('GET', '/feed/admin/SUPERTOKEN/tags/t:foo?sort=updated');
         $this->assertSame(200, $client->getResponse()->getStatusCode());
         $this->assertSame('test title entry1', $crawler->filterXPath('//feed/entry[1]/title')->text());
         $this->assertSame('test title entry4', $crawler->filterXPath('//feed/entry[2]/title')->text());
 
         // tag foo - with invalid sort
-        $client->request('GET', '/feed/admin/SUPERTOKEN/tags/foo?sort=invalid');
+        $client->request('GET', '/feed/admin/SUPERTOKEN/tags/t:foo?sort=invalid');
         $this->assertSame(400, $client->getResponse()->getStatusCode());
 
         // tag foo/3000
-        $client->request('GET', '/feed/admin/SUPERTOKEN/tags/foo/3000');
+        $client->request('GET', '/feed/admin/SUPERTOKEN/tags/t:foo/3000');
         $this->assertSame(302, $client->getResponse()->getStatusCode());
     }