diff --git a/.circleci/config.yml b/.circleci/config.yml
index e71e9d1919f..58be23c9a00 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -136,7 +136,7 @@ jobs:
     executor:
       class: medium+
       name: sb_node_14_browsers
-    parallelism: 12
+    parallelism: 11
     steps:
       - git-shallow-clone/checkout_advanced:
           clone_options: '--depth 1 --verbose'