Attempt to enable tests in more-ci

.github/workflows/more-ci.yml

@@ -53,15 +53,10 @@ jobs:
       #     janestreet-bleeding-external: https://github.com/janestreet/opam-repository.git#external-packages
 
       - name: Install dependencies
-        run: opam install ./provider.opam --deps-only --with-test
+        run: opam install ./provider.opam ./provider-tests.opam --deps-only --with-test
 
-      - name: Build
-        run: opam exec -- dune build @all -p provider
-
-      # For now, we only run tests for the `provider` package. Effectively, this
-      # runs nothing because the tests are in the `provider-test` package. We
-      # configured this in preparation for running the tests for specific
-      # packages only in the future, once we have a dedicated test suite that
-      # can run on every matrix combination configured here.
-      - name: Run tests
-        run: opam exec -- dune build @runtest -p provider
+      # We build and run tests for a subset of packages. More tests are run in
+      # the development workflow and as part of the main CI job. These are the
+      # tests that are checked for every combination of os and ocaml-compiler.
+      - name: Build & Run tests
+        run: opam exec -- dune build @all @runtest -p provider,provider-tests