diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e1c81f68f..49250bc45 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -38,9 +38,9 @@ jobs:
         os:
           - macos-latest
           - ubuntu-latest
-          # - windows-latest
+          - windows-latest
         ocaml-compiler:
-          - 5.2.x
+          - "5.2"
     # The type of runner that the job will run on
     runs-on: ${{ matrix.os }}
 
@@ -55,9 +55,10 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set-up OCaml ${{ matrix.ocaml-compiler }}
-        uses: ocaml/setup-ocaml@v2
+        uses: ocaml/setup-ocaml@v3.0.0-alpha
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          allow-prerelease-opam: true
 
       - name: Install dependencies
         run: |
diff --git a/tests/test-dirs/server-tests/incremental-index.t b/tests/test-dirs/server-tests/incremental-index.t
index d7e970980..a94b5e2ae 100644
--- a/tests/test-dirs/server-tests/incremental-index.t
+++ b/tests/test-dirs/server-tests/incremental-index.t
@@ -1,3 +1,5 @@
+  $ echo $BUILD_PATH_PREFIX_MAP
+
   $ $MERLIN server stop-server
 
   $ cat >main.ml <<'EOF'