diff --git a/core/server/lib/mobiledoc/create-card.js b/core/server/lib/mobiledoc/create-card.js
index 8049469b1c..44ba8d61f9 100644
--- a/core/server/lib/mobiledoc/create-card.js
+++ b/core/server/lib/mobiledoc/create-card.js
@@ -1,7 +1,7 @@
 let urlUtils;
 
 module.exports = function createCard(card) {
-    const defaultTransformer = function (payload) {
+    const defaultTransformer = function (urlUtils, payload) {
         return payload;
     };
 
diff --git a/core/test/unit/lib/mobiledoc/cards/hr_spec.js b/core/test/unit/lib/mobiledoc/cards/hr_spec.js
index 8d75301f6e..679b87b602 100644
--- a/core/test/unit/lib/mobiledoc/cards/hr_spec.js
+++ b/core/test/unit/lib/mobiledoc/cards/hr_spec.js
@@ -13,4 +13,16 @@ describe('HR card', function () {
 
         serializer.serialize(card.render(opts)).should.match('<hr>');
     });
+
+    it('transforms urls absolute to relative', function () {
+        let payload = {};
+        const transformed = card.absoluteToRelative(payload, {});
+        transformed.should.deepEqual({});
+    });
+
+    it('transforms urls relative to absolute', function () {
+        let payload = {};
+        const transformed = card.relativeToAbsolute(payload, {});
+        transformed.should.deepEqual({});
+    });
 });