diff --git a/app/test_smiles.py b/app/test_smiles.py
new file mode 100644
index 0000000..98aa1ef
--- /dev/null
+++ b/app/test_smiles.py
@@ -0,0 +1,5 @@
+from .smiles import Smiles
+
+
+def test_smile():
+    assert Smiles.smile() == ":)"