diff --git a/.github/workflows/master_docker.yml b/.github/workflows/master_docker.yml
index c19a050..a0bb9f0 100644
--- a/.github/workflows/master_docker.yml
+++ b/.github/workflows/master_docker.yml
@@ -7,6 +7,7 @@ on:
   push:
     branches:
       - 'master'
+
 env:
   OPAMROOT: /home/opam/.opam
   OPAMYES: true
@@ -55,10 +56,6 @@ jobs:
         run: |
           opam exec -- dune build
 
-      - name: Running tests...
-        run: |
-          opam exec -- dune runtest
-
       - name: Build API documentation
         run: opam exec -- dune build @doc
 
@@ -85,6 +82,20 @@ jobs:
           keep_files: true
           destination_dir: lints
 
+      - name: Running tests...
+        run: |
+          opam exec -- dune runtest --instrument-with bisect_ppx
+        env:
+          BISECT_DIR: ${{ runner.temp }}/_bisect_ppx_data
+          BISECT_FILE: ${{ runner.temp }}/_bisect_ppx_data/data
+
+      - name: Send coverage report to Coveralls
+        run: opam exec -- bisect-ppx-report send-to Coveralls --coverage-path $BISECT_DIR
+        env:
+          BISECT_DIR: ${{ runner.temp }}/_bisect_ppx_data
+          COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          PULL_REQUEST_NUMBER: ${{ github.event.number }}
+
       # - name: Deploy linters' descriptions to another repo
       #   uses: peaceiris/actions-gh-pages@v3
       #   with:
diff --git a/Makefile b/Makefile
index e525b40..311a580 100644
--- a/Makefile
+++ b/Makefile
@@ -34,5 +34,5 @@ test_coverage:
 	mkdir -p $(TEST_COV_D)
 	BISECT_FILE=$(TEST_COV_D)/zanuda dune runtest --no-print-directory \
           --instrument-with bisect_ppx --force
-	bisect-ppx-report html --coverage-path $(TEST_COV_D)
-	bisect-ppx-report summary --coverage-path $(TEST_COV_D)
+	bisect-ppx-report html --coverage-path $(TEST_COV_D) --expect src/
+	bisect-ppx-report summary --coverage-path $(TEST_COV_D) --expect src/