diff --git a/gallery_dl/extractor/nitter.py b/gallery_dl/extractor/nitter.py
index 9f5cc9da..bc7b308b 100644
--- a/gallery_dl/extractor/nitter.py
+++ b/gallery_dl/extractor/nitter.py
@@ -96,6 +96,8 @@ class NitterExtractor(BaseExtractor):
 
                         for url in text.extract_iter(
                                 attachments, '<source src="', '"'):
+                            if url[0] == "/":
+                                url = self.root + url
                             append(text.nameext_from_url(url, {"url": url}))
 
             else:
diff --git a/test/results/nitternet.py b/test/results/nitternet.py
index 2a1cccf6..31786a37 100644
--- a/test/results/nitternet.py
+++ b/test/results/nitternet.py
@@ -76,7 +76,7 @@ __tests__ = (
     "#sha1_url"    : "3f2b64e175bf284aa672c3bb53ed275e470b919a",
     "#sha1_content": "ab05e1d8d21f8d43496df284d31e8b362cd3bcab",
 
-    "comments" : 19,
+    "comments" : int,
     "content"  : "Big Wedeene River, Canada",
     "count"    : 1,
     "date"     : "dt:2015-05-29 17:40:00",
@@ -84,7 +84,7 @@ __tests__ = (
     "filename" : "CGMNYZvW0AIVoom",
     "likes"    : int,
     "num"      : 1,
-    "quotes"   : 10,
+    "quotes"   : int,
     "retweets" : int,
     "tweet_id" : "604341487988576256",
     "url"      : "https://nitter.net/pic/orig/media%2FCGMNYZvW0AIVoom.jpg",