diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 0000000..3ae3622
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,6 @@
+from clipea import utils
+
+
+def test_anystr_force_str():
+    assert utils.anystr_force_str(b'hello') == 'hello'
+    assert utils.anystr_force_str('hello') == 'hello'