diff --git a/usr/lib/linuxmint/mintSources/mintSources.py b/usr/lib/linuxmint/mintSources/mintSources.py
index 3816782..5a797e1 100755
--- a/usr/lib/linuxmint/mintSources/mintSources.py
+++ b/usr/lib/linuxmint/mintSources/mintSources.py
@@ -717,6 +717,7 @@ def _speed_test_thread(self, task, source_object, task_data, cancellable):
                 c.setopt(pycurl.CONNECTTIMEOUT, 5)
                 c.setopt(pycurl.TIMEOUT, 20)
                 c.setopt(pycurl.FOLLOWLOCATION, 1)
+                c.setopt(pycurl.FAILONERROR, 1)
                 c.setopt(pycurl.WRITEFUNCTION, buff.write)
                 c.setopt(pycurl.NOSIGNAL, 1)
                 c.setopt(pycurl.USERAGENT, USER_AGENT)