Support rendering previews with data: URLs in them (#11767)

Images which are data URLs will no longer break URL
previews and will properly be "downloaded" and
thumbnailed.

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/server.py b/tests/server.py

index a0cd14ea45..82990c2eb9 100644
--- a/tests/server.py
+++ b/tests/server.py
@@ -313,7 +313,7 @@ def make_request(
     req = request(channel, site)
     req.content = BytesIO(content)
     # Twisted expects to be at the end of the content when parsing the request.
-    req.content.seek(SEEK_END)
+    req.content.seek(0, SEEK_END)
 
     if access_token:
         req.requestHeaders.addRawHeader(