1 files changed, 1 insertions, 0 deletions
diff --git a/toolkit/components/extensions/test/xpcshell/test_ext_dnr_modifyHeaders.js b/toolkit/components/extensions/test/xpcshell/test_ext_dnr_modifyHeaders.js
index 4b7bebe188..df9e9d77ef 100644
--- a/toolkit/components/extensions/test/xpcshell/test_ext_dnr_modifyHeaders.js
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_dnr_modifyHeaders.js
@@ -29,6 +29,7 @@ server.registerPathHandler("/echoheaders", (req, res) => {
   dropDefaultHeader("accept-language");
   dropDefaultHeader("accept-encoding");
   dropDefaultHeader("connection");
+  dropDefaultHeader("priority");
 
   res.write(JSON.stringify(headers));
 });