diff --git a/.github/workflows/ocaml.yaml b/.github/workflows/ocaml.yaml
new file mode 100644
index 00000000..19c8c65a
--- /dev/null
+++ b/.github/workflows/ocaml.yaml
@@ -0,0 +1,86 @@
+name: OCaml
+
+on:
+  push:
+    branches:
+      - 'feature/*'
+      - 'bugfix/*'
+      - 'hotfix/*'
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      OCAML_JUPYTER_LOG: debug
+    strategy:
+      fail-fast: false
+      matrix:
+        ocaml-compiler:
+          - 4.11.0
+          - 4.12.0
+          - 4.13.0
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup OCaml
+        uses: ocaml/setup-ocaml@master
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.9'
+          architecture: 'x64'
+      - name: Install Jupyter
+        run: pip install jupyter
+
+      - name: Install dependencies
+        run: |
+          opam install . -y --deps-only --with-test
+          opam install 'merlin>3.0.0' -y
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.opam
+            ~/.local
+          key: ${{ runner.os }}-opam-${{ matrix.ocaml-compiler }}-${{ hashFiles('*.opam') }}
+          restore-keys: ${{ runner.os }}-opam-${{ matrix.ocaml-compiler }}-
+
+      - name: Lint for opam files
+        run: opam lint *.opam
+      - name: Lint for source files
+        run: ./git/pre-commit
+      - name: Build
+        run: opam exec -- dune build
+      - name: Unit tests
+        run: opam exec -- dune runtest
+
+      # =====
+      # Integration tests
+      # =====
+
+      - name: Install ocaml-jupyter kernel
+        run: opam pin add jupyter . -y
+      - name: Install jupyter-archimedes
+        run: opam pin add jupyter-archimedes . -y
+      - name: Install kernelspec
+        run: |
+          ./config/ocaml-jupyter-opam-genspec
+          jupyter kernelspec install --user --name ocaml-jupyter "$(opam config var share)/jupyter"
+          echo '#use "topfind";;' >> ~/.ocamlinit
+
+      - name: Build integration tests
+        run: opam exec -- dune build test/integration/runtest.exe
+      - name: An integration test for jupyter-notebook
+        run: opam exec -- ./_build/default/test/integration/runtest.exe test/integration/suite/jupyter-notebook.ml
+      - name: An integration test for ppx
+        run: opam exec -- ./_build/default/test/integration/runtest.exe test/integration/suite/ppx.ml
+      - name: An integration test for jupyter-archimedes
+        run: opam exec -- ./_build/default/test/integration/runtest.exe test/integration/suite/jupyter-archimedes.ml
diff --git a/git/pre-commit b/git/pre-commit
index 09bdbd2d..8ae38080 100755
--- a/git/pre-commit
+++ b/git/pre-commit
@@ -2,10 +2,6 @@
 
 eval $(opam env)
 
-if ! which ocp-indent 2>&1 >/dev/null; then
-    opam install -y 'ocp-indent>=1.7.0'
-fi
-
 exit_code=0
 
 for fname in $(find jupyter jupyter-archimedes test -name '*.ml' -or -name '*.mli'); do
diff --git a/jupyter.opam b/jupyter.opam
index 468b0e32..90cf58cb 100644
--- a/jupyter.opam
+++ b/jupyter.opam
@@ -32,6 +32,8 @@ depends: [
   "ppx_deriving_yojson" {>= "3.0"}
   "cryptokit" {>= "1.12"}
   "dune" {build & >= "1.0.0"}
+  "ounit2" {with-test & >= "2.0.0"}
+  "ocp-indent" {with-test & >= "1.7.0"}
 ]
 depopts: [
   "merlin"
diff --git a/test/completor/dune b/test/completor/dune
index 46167610..1c484acb 100644
--- a/test/completor/dune
+++ b/test/completor/dune
@@ -3,7 +3,7 @@
  (preprocess (pps lwt_ppx ppx_deriving.show ppx_deriving_yojson))
  (libraries  jupyter
              jupyter_completor
-             oUnit
+             ounit2
              ppx_deriving.runtime)
  (flags      ((:include %{workspace_root}/config/ocaml_flags.sexp)
               (:include %{workspace_root}/config/ocaml_test_flags.sexp))))
diff --git a/test/kernel/dune b/test/kernel/dune
index 05a76417..3524db12 100644
--- a/test/kernel/dune
+++ b/test/kernel/dune
@@ -4,7 +4,7 @@
  (preprocess (pps lwt_ppx ppx_deriving.show ppx_deriving_yojson))
  (libraries  jupyter
              jupyter_kernel
-             oUnit
+             ounit2
              ppx_deriving.runtime)
  (flags      ((:include %{workspace_root}/config/ocaml_flags.sexp)
               (:include %{workspace_root}/config/ocaml_test_flags.sexp))))
diff --git a/test/repl/dune b/test/repl/dune
index 3ee9fff7..0f529fde 100644
--- a/test/repl/dune
+++ b/test/repl/dune
@@ -5,7 +5,7 @@
  (preprocess (pps lwt_ppx ppx_deriving.show ppx_deriving_yojson))
  (libraries  jupyter
              jupyter_repl
-             oUnit
+             ounit2
              ppx_deriving.runtime)
  (flags      ((:include %{workspace_root}/config/ocaml_flags.sexp)
               (:include %{workspace_root}/config/ocaml_test_flags.sexp))))