diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e10809f..8c89667 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,7 +14,7 @@ jobs:
   test-sphinx:
     uses: ./.github/workflows/sphinx.yml
     with:
-      path-to-doc: .
+      path-to-doc: src
   test-py-coverage:
     uses: ./.github/workflows/py-coverage.yml
   test-py-publish:
diff --git a/.gitignore b/.gitignore
index 5ceb386..fde2934 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 venv
+testing/dist/
+testing/*.egg-info/
diff --git a/testing/README.md b/testing/README.md
new file mode 100644
index 0000000..5947acf
--- /dev/null
+++ b/testing/README.md
@@ -0,0 +1,3 @@
+# Test reusable workflows
+
+This folder code is used for testing reusable workflow under `.github/workflows/`.
diff --git a/testing/build/lib/main.py b/testing/build/lib/main.py
new file mode 100644
index 0000000..8272678
--- /dev/null
+++ b/testing/build/lib/main.py
@@ -0,0 +1,8 @@
+"""test reusable workflows"""
+
+def dummy():
+    print("dummy function.")
+
+
+if "__main__" == __name__:
+    dummy()
diff --git a/testing/docs/.keep b/testing/docs/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/testing/main.py b/testing/main.py
new file mode 100644
index 0000000..8272678
--- /dev/null
+++ b/testing/main.py
@@ -0,0 +1,8 @@
+"""test reusable workflows"""
+
+def dummy():
+    print("dummy function.")
+
+
+if "__main__" == __name__:
+    dummy()
diff --git a/testing/pyproject.toml b/testing/pyproject.toml
new file mode 100644
index 0000000..633de0f
--- /dev/null
+++ b/testing/pyproject.toml
@@ -0,0 +1,20 @@
+[build-system]
+requires = ["setuptools>=61", "setuptools-scm"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "dummy"
+description = "dummy "
+keywords = ["dummy", ".github", "reusable", "workflows"]
+license = {text = "MIT License"}
+authors = [
+    { name = "Peter Shen", email = "xianpeng.shen@gmail.com" },
+]
+classifiers = [
+    # https://pypi.org/pypi?%3Aaction=list_classifiers
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "Programming Language :: Python :: 3",
+    "Topic :: Software Development :: Build Tools",
+]
+dynamic = ["version"]
diff --git a/testing/tests/mian_test.py b/testing/tests/mian_test.py
new file mode 100644
index 0000000..e69de29