diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..021cede
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,26 @@
+# Imported form Setup-OCaml
+name: Main build/test
+on: [push, pull_request]
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - macos-latest
+          - ubuntu-latest
+          - windows-latest
+        ocaml-compiler:
+          - 4.12.x
+          - 4.13.x
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Use OCaml ${{ matrix.ocaml-compiler }}
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+      - run: opam install tezos-contract-metadata.opam --deps-only --with-test
+      - run: opam exec -- dune build
+      - run: opam exec -- dune runtest
diff --git a/tezos-contract-metadata-cli.opam b/tezos-contract-metadata-cli.opam
index 58d2e70..adda09b 100644
--- a/tezos-contract-metadata-cli.opam
+++ b/tezos-contract-metadata-cli.opam
@@ -22,7 +22,7 @@ depends: [
   "odoc" {with-doc}
 ]
 build: [
-  ["dune" "subst" "--root" "."] {dev}
+#  ["dune" "subst" "--root" "."] {dev}
   [
     "dune"
     "build"
diff --git a/tezos-contract-metadata-test.opam b/tezos-contract-metadata-test.opam
deleted file mode 100644
index 9f0e2b6..0000000
--- a/tezos-contract-metadata-test.opam
+++ /dev/null
@@ -1,35 +0,0 @@
-# This file is generated by dune, edit dune-project instead
-opam-version: "2.0"
-synopsis: "Tests for tezos-contract-metadata"
-description: "A separate projeect because of different tests"
-maintainer: ["seb@mondet.org"]
-authors: ["Tezos Devteam"]
-license: "MIT"
-homepage: "https://github.com/oxheadalpha/tezos-contract-metadata"
-bug-reports: "https://github.com/oxheadalpha/tezos-contract-metadata/issues"
-depends: [
-  "base" {>= "0.14.0"}
-  "dune" {>= "2.9" & >= "2.9"}
-  "ppx_expect" {>= "0.14.0"}
-  "ppx_inline_test" {>= "0.14.0"}
-  "tezos-contract-metadata" {= "0.2"}
-  "odoc" {with-doc}
-]
-build: [
-  ["dune" "subst" "--root" "."] {dev}
-  [
-    "dune"
-    "build"
-    "-p"
-    name
-    "-j"
-    jobs
-    "--promote-install-files"
-    "false"
-    "@install"
-    "@runtest" {with-test}
-    "@doc" {with-doc}
-  ]
-  ["dune" "install" "-p" name "--create-install-files" name]
-]
-dev-repo: "git+https://github.com/oxheadalpha/tezos-contract-metadata.git"