diff --git a/mozilla/testing/mochitest/server.py b/mozilla/testing/mochitest/server.py
index a7f230949cf..2e6e3612b78 100644
--- a/mozilla/testing/mochitest/server.py
+++ b/mozilla/testing/mochitest/server.py
@@ -8,6 +8,7 @@ PORT = 8888
 
 Handler = SimpleHTTPServer.SimpleHTTPRequestHandler
 Handler.extensions_map[".xhtml"] = "application/xhtml+xml"
+Handler.extensions_map[".svg"] = "image/svg+xml"
 httpd = SocketServer.TCPServer(("", PORT), Handler)
 
 print "serving at port", PORT