@@ -939,6 +939,7 @@ def test_with_statement_logout(self):
 
     @threading_helper.reap_threads
     @cpython_only
+    @unittest.skipUnless(__debug__, "Won't work if __debug__ is False")
     def test_dump_ur(self):
         # See: http://bugs.python.org/issue26543
         untagged_resp_dict = {'READ-WRITE': [b'']}
 
@@ -0,0 +1 @@
+Fixing tests that fail when running with optimizations (``-O``) in ``test_imaplib.py``.
Original file line number	Diff line number	Diff line change
@@ -0,0 +1 @@
	1	+ Fixing tests that fail when running with optimizations (``-O``) in ``test_imaplib.py``.