diff --git a/tests/test_commands.py b/tests/test_commands.py
index e69de29bb..50db6c3d2 100644
--- a/tests/test_commands.py
+++ b/tests/test_commands.py
@@ -0,0 +1,24 @@
+import os
+import tempfile
+from unittest import TestCase
+from unittest.mock import MagicMock
+from aider.commands import Commands
+from aider.io import InputOutput
+
+class TestCommands(TestCase):
+    def test_cmd_add(self):
+        # Create a temporary directory and change the current working directory
+        with tempfile.TemporaryDirectory() as tmpdir:
+            os.chdir(tmpdir)
+
+            # Initialize the Commands and InputOutput objects
+            io = InputOutput(pretty=False, yes=True)
+            coder = MagicMock()
+            commands = Commands(io, coder)
+
+            # Call the cmd_add method with 'foo.txt' and 'bar.txt'
+            commands.cmd_add(["foo.txt", "bar.txt"])
+
+            # Check if both files have been created in the temporary directory
+            self.assertTrue(os.path.exists("foo.txt"))
+            self.assertTrue(os.path.exists("bar.txt"))