diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 273e338..12cbc72 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,217 +3,73 @@ name: CI
 on:
   push:
     branches:
-    - "**"
+      - "**"
   pull_request:
   workflow_dispatch:
 
 jobs:
-  v2_23:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.23
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '16.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '16.04'
-          glibc: '2.23'
-
-  v2_24:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.24
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '16.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '16.10'
-          glibc: '2.24'
-  v2_27:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.27
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '18.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '18.04'
-          glibc: '2.27'
-  v2_31:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.31
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '20.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '20.04'
-          glibc: '2.31'
-  v2_32:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.32
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '20.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '20.10'
-          glibc: '2.32'
-  v2_33:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.33
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '20.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '21.04'
-          glibc: '2.33'
-  v2_34:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.34
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '20.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '21.10'
-          glibc: '2.34'
-  v2_35:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.35
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '22.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '22.04'
-          glibc: '2.35'
-  v2_36:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.36
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '22.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '22.10'
-          glibc: '2.36'
-  v2_37:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.37
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '22.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '23.04'
-          glibc: '2.37'
-  v2_38:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.38
-    steps:
-      - name: build how2heap
-        uses: shellphish/how2heap/ci/build@master
-        with:
-          ubuntu: '22.04'
-      - name: test how2heap
-        uses: shellphish/how2heap/ci/test@master
-        with:
-          ubuntu: '23.10'
-          glibc: '2.38'
-  v2_39:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.39
-    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: '24.04'
-          glibc: '2.39'
-  v2_40:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.40
-    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: '24.10'
-          glibc: '2.40'
-  v2_41:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.41
-    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: '25.04'
-          glibc: '2.41'
-  v2_42:
-    runs-on: ubuntu-22.04
-    name: glibc-v2.42
-    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: '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'
+  tests:
+    name: glibc-v${{ matrix.glibc }}
+    runs-on: ubuntu-22.04
+    steps:
+      - name: build tests
+        uses: shellphish/how2heap/ci/build@master
+        with:
+          ubuntu: ${{ matrix.build_ubuntu }}
+      - name: run tests
+        uses: shellphish/how2heap/ci/test@master
+        with:
+          ubuntu: ${{ matrix.test_ubuntu }}
+          glibc: ${{ matrix.glibc }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - glibc: "2.23"
+            build_ubuntu: "16.04"
+            test_ubuntu: "16.04"
+          - glibc: "2.24"
+            build_ubuntu: "16.04"
+            test_ubuntu: "16.10"
+          - glibc: "2.27"
+            build_ubuntu: "18.04"
+            test_ubuntu: "18.04"
+          - glibc: "2.31"
+            build_ubuntu: "20.04"
+            test_ubuntu: "20.04"
+          - glibc: "2.32"
+            build_ubuntu: "20.04"
+            test_ubuntu: "20.10"
+          - glibc: "2.33"
+            build_ubuntu: "20.04"
+            test_ubuntu: "21.04"
+          - glibc: "2.34"
+            build_ubuntu: "20.04"
+            test_ubuntu: "21.10"
+          - glibc: "2.35"
+            build_ubuntu: "22.04"
+            test_ubuntu: "22.04"
+          - glibc: "2.36"
+            build_ubuntu: "22.04"
+            test_ubuntu: "22.10"
+          - glibc: "2.37"
+            build_ubuntu: "22.04"
+            test_ubuntu: "23.04"
+          - glibc: "2.38"
+            build_ubuntu: "22.04"
+            test_ubuntu: "23.10"
+          - glibc: "2.39"
+            build_ubuntu: "24.04"
+            test_ubuntu: "24.04"
+          - glibc: "2.40"
+            build_ubuntu: "24.04"
+            test_ubuntu: "24.10"
+          - glibc: "2.41"
+            build_ubuntu: "24.04"
+            test_ubuntu: "25.04"
+          - glibc: "2.42"
+            build_ubuntu: "24.04"
+            test_ubuntu: "25.10"
+          - glibc: "2.43"
+            build_ubuntu: "24.04"
+            test_ubuntu: "26.04"