diff --git a/tests/basics/string_join.py b/tests/basics/string_join.py
index 4a2e9aa913..82f1b799a0 100644
--- a/tests/basics/string_join.py
+++ b/tests/basics/string_join.py
@@ -13,6 +13,11 @@ print(','.join('abc' for i in range(5)))
 
 print(b','.join([b'abc', b'123']))
 
+try:
+    ''.join(None)
+except TypeError:
+    print("TypeError")
+
 try:
     print(b','.join(['abc', b'123']))
 except TypeError: