diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 294ccccc..a7178d51 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,62 +13,19 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-latest
+          - windows-latest
         packages: [ '.' ]
         runtest:
           - true
         ocaml-compiler:
-          - 4.14.x
-          - 5.0.x
+          - 4.14
+          - 5.2
         include:
-          - os: macos-latest
-            ocaml-compiler: 4.14.x
-            packages: '.'
-            runtest: true
-
-          - os: windows-latest
-            ocaml-compiler: 4.14.x
-            packages: 'alcotest alcotest-js alcotest-lwt alcotest-mirage'
-            opam-local-packages: 'alcotest.opam alcotest-js.opam alcotest-lwt.opam alcotest-mirage.opam'
-            runtest: false
-
-          - os: ubuntu-latest
-            ocaml-compiler: 4.08.x
-            packages: 'alcotest alcotest-js alcotest-lwt alcotest-mirage'
-            opam-local-packages: 'alcotest.opam alcotest-js.opam alcotest-lwt.opam alcotest-mirage.opam'
-            runtest: false
-
-          - os: ubuntu-latest
-            ocaml-compiler: 4.09.x
-            packages: 'alcotest alcotest-js alcotest-lwt alcotest-mirage'
-            opam-local-packages: 'alcotest.opam alcotest-js.opam alcotest-lwt.opam alcotest-mirage.opam'
-            runtest: false
-
           - os: ubuntu-latest
-            ocaml-compiler: 4.10.x
+            ocaml-compiler: 4.08
             packages: 'alcotest alcotest-js alcotest-lwt alcotest-mirage'
             opam-local-packages: 'alcotest.opam alcotest-js.opam alcotest-lwt.opam alcotest-mirage.opam'
-            runtest: false
-
-          - os: ubuntu-latest
-            ocaml-compiler: 4.11.x
-            packages: 'alcotest alcotest-js alcotest-lwt alcotest-mirage'
-            opam-local-packages: 'alcotest.opam alcotest-js.opam alcotest-lwt.opam alcotest-mirage.opam'
-            runtest: false
- 
-          - os: ubuntu-latest
-            ocaml-compiler: 4.12.x
-            packages: 'alcotest alcotest-js alcotest-lwt alcotest-mirage'
-            opam-local-packages: 'alcotest.opam alcotest-js.opam alcotest-lwt.opam alcotest-mirage.opam'
-            runtest: false
- 
-          - os: ubuntu-latest
-            ocaml-compiler: 4.13.x
-            packages: 'alcotest alcotest-js alcotest-lwt alcotest-mirage'
-            opam-local-packages: 'alcotest.opam alcotest-js.opam alcotest-lwt.opam alcotest-mirage.opam'
-            runtest: false
-
-
+            runtest: true
 
     runs-on: ${{ matrix.os }}