diff --git a/pyproject.toml b/pyproject.toml
index 68f242a..1c2ad4e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,4 @@
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
 testpaths = ["tests"]
+pythonpath = ["../a2a"]