diff --git a/tests/51media/48admin-quarantine.pl b/tests/51media/48admin-quarantine.pl
index be82e81dd..ff808c8ba 100644
--- a/tests/51media/48admin-quarantine.pl
+++ b/tests/51media/48admin-quarantine.pl
@@ -44,7 +44,7 @@
       })->then( sub {
          do_request_json_for( $admin,
             method   => "POST",
-            full_uri => "/_synapse/admin/v1/quarantine_media/$room_id",
+            full_uri => "/_synapse/admin/v1/room/$room_id/media/quarantine",
             content  => {},
          );
       })->SyTest::pass_on_done( "Quarantine returns success" )