diff --git a/conftest.py b/conftest.py
new file mode 100644
index 0000000..3cccfe1
--- /dev/null
+++ b/conftest.py
@@ -0,0 +1,8 @@
+pytest_plugins = 'setuptools.tests.fixtures'
+
+
+def pytest_addoption(parser):
+    parser.addoption(
+        "--package_name", action="append", default=[],
+        help="list of package_name to pass to test functions",
+    )