diff --git a/src/__init__.py b/src/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/main.py b/src/main.py
new file mode 100644
index 0000000..8760a9a
--- /dev/null
+++ b/src/main.py
@@ -0,0 +1,2 @@
+def hello_world() -> str:
+    return "Hello, World!"
\ No newline at end of file
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_main.py b/tests/test_main.py
new file mode 100644
index 0000000..cd0552b
--- /dev/null
+++ b/tests/test_main.py
@@ -0,0 +1,5 @@
+from src.main import hello_world
+
+
+def test_hello_world():
+    assert hello_world() == "Hello, World!"
\ No newline at end of file