#16910: test_bytes, test_unicode, and test_userstring now work with unittest test discovery.  Patch by Zachary Ware.
diff --git a/Lib/test/string_tests.py b/Lib/test/string_tests.py
index e4688d0..27e4662 100644
--- a/Lib/test/string_tests.py
+++ b/Lib/test/string_tests.py
@@ -19,7 +19,7 @@
     def __init__(self): self.seq = ['a', 'b', 'c']
     def __len__(self): return 8
 
-class BaseTest(unittest.TestCase):
+class BaseTest:
     # These tests are for buffers of values (bytes) and not
     # specific to character interpretation, used for bytes objects
     # and various string implementations