diff --git a/testing/web-platform/meta/webauthn/getcredential-rk-passing.https.html.ini b/testing/web-platform/meta/webauthn/getcredential-rk-passing.https.html.ini
index 2d3c2b310e044..59d62b4e4e585 100644
--- a/testing/web-platform/meta/webauthn/getcredential-rk-passing.https.html.ini
+++ b/testing/web-platform/meta/webauthn/getcredential-rk-passing.https.html.ini
@@ -11,6 +11,7 @@
       if not debug and (os == "linux") and not webrender and (processor == "x86_64"): ["FAIL", "TIMEOUT"]
       if not debug and (os == "linux") and webrender: TIMEOUT
       if not debug and (os == "win"): TIMEOUT
+      if not debug and (os == "mac"): TIMEOUT
       FAIL
 
   [undefined allowCredentials]