diff --git a/tests/test__mysql.py b/tests/test__mysql.py
new file mode 100644
index 0000000..e2cb608
--- /dev/null
+++ b/tests/test__mysql.py
@@ -0,0 +1,7 @@
+import pytest
+import _mysql
+
+
+def test_result_type():
+    with pytest.raises(TypeError):
+        _mysql.result(b"xyz")