diff --git a/.github/workflows/test-pkg.yml b/.github/workflows/test-pkg.yml
index de8c2eb..73de51a 100644
--- a/.github/workflows/test-pkg.yml
+++ b/.github/workflows/test-pkg.yml
@@ -27,4 +27,9 @@ jobs:
         run: make lint
 
       - name: test
-        run: make test
+        run: PYTEST_FLAGS='--cov-report json --cov-report term --cov=pylspclient --cov-branch' make test
+
+      - name: upload coverage
+        uses: actions/upload-artifact@v2
+          name: coverage
+          path: ./dist
diff --git a/pyproject.toml b/pyproject.toml
index d331353..4f0c364 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ optional = true
 [tool.poetry.group.tests.dependencies]
 ruff = "^0.1.6"
 pytest = "^7.4.0"
+pytest-cov = "^4.1.0"
 python-lsp-server = "^1.9.0"
 
 [tool.poetry.group.dev]