diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 06255d8..273e338 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -204,3 +204,16 @@ jobs:
         with:
           ubuntu: '25.10'
           glibc: '2.42'
+  v2_43:
+    runs-on: ubuntu-22.04
+    name: glibc-v2.43
+    steps:
+      - name: build how2heap
+        uses: shellphish/how2heap/ci/build@master
+        with:
+          ubuntu: '24.04'
+      - name: test how2heap
+        uses: shellphish/how2heap/ci/test@master
+        with:
+          ubuntu: '26.04'
+          glibc: '2.43'