Fix out-of-date comment in test_memoryview.
diff --git a/Lib/test/test_memoryview.py b/Lib/test/test_memoryview.py
index 5a33d035..ee6b15a 100644
--- a/Lib/test/test_memoryview.py
+++ b/Lib/test/test_memoryview.py
@@ -1,6 +1,7 @@
 """Unit tests for the memoryview
 
-XXX We need more tests! Some tests are in test_bytes
+   Some tests are in test_bytes. Many tests that require _testbuffer.ndarray
+   are in test_buffer.
 """
 
 import unittest