diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 112af6c..afb30df 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -25,6 +25,9 @@ jobs:
       matrix:
         gap-branch:
           - master
+          - stable-4.14
+          - stable-4.13
+          - stable-4.12
         ABI: ['']
         include:
           - gap-branch: master