diff --git a/pyproject.toml b/pyproject.toml
index 71513ae..280c635 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,3 +9,9 @@ authors = [
     {name = "Irene Li"},
     {name = "Michael Kranzlein"}
 ]
+
+# https://stackoverflow.com/questions/50155464/using-pytest-with-a-src-layer
+[tool.pytest.ini_options]
+pythonpath = [
+  "src"
+]
\ No newline at end of file