diff --git a/gallery_dl/extractor/inkbunny.py b/gallery_dl/extractor/inkbunny.py
index 8b167921..bff3156d 100644
--- a/gallery_dl/extractor/inkbunny.py
+++ b/gallery_dl/extractor/inkbunny.py
@@ -153,8 +153,8 @@ class InkbunnyFavoriteExtractor(InkbunnyExtractor):
 
     def metadata(self):
         # Lookup fav user ID as username
-        path = "/userfavorites_process.php?favs_user_id=" + self.user_id
-        url = self.root + path
+        url = "{}/userfavorites_process.php?favs_user_id={}".format(
+            self.root, self.user_id)
         page = self.request(url).text
         user_link = text.extr(page, '<a rel="author"', '</a>')
         favs_username = text.extr(user_link, 'href="/', '"')
diff --git a/test/results/inkbunny.py b/test/results/inkbunny.py
index 3e2edaf6..4e05da7c 100644
--- a/test/results/inkbunny.py
+++ b/test/results/inkbunny.py
@@ -91,7 +91,8 @@ __tests__ = (
     "#pattern" : r"https://[\w.]+\.metapix\.net/files/full/\d+/\d+_\w+_.+",
     "#range"   : "20-50",
 
-    "favs_user_id": "20969",
+    "favs_user_id" : "20969",
+    "favs_username": "soina",
 },
 
 {