diff --git a/main.py b/main.py
new file mode 100644
index 0000000..19cf2a0
--- /dev/null
+++ b/main.py
@@ -0,0 +1,2 @@
+def add(a, b):
+    return a + b
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..b3a27dd
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+pytest==7.4.0
+ruff==0.1.0
\ No newline at end of file
diff --git a/test_main.py b/test_main.py
new file mode 100644
index 0000000..9d73ff6
--- /dev/null
+++ b/test_main.py
@@ -0,0 +1,4 @@
+# test_main.py
+from main import add
+def test_add():
+    assert add(2, 3) == 5
\ No newline at end of file