diff --git a/test/test_builtin.py b/test/test_builtin.py
new file mode 100644
index 00000000..858792d4
--- /dev/null
+++ b/test/test_builtin.py
@@ -0,0 +1,13 @@
+from jedi import builtin
+
+
+def test_parse_function_doc_illegal_docstr():
+
+    def test_func(a):
+        """
+        test_func(o
+
+        doesn't have a closing bracket.
+        """
+
+    assert ('', '') == builtin._parse_function_doc(test_func)