diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index a34c03e6..11a05962 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -402,7 +402,8 @@
       'leveldb::NewMemEnv',
       (
         'Instead of leveldb::NewMemEnv() use leveldb_chrome::NewMemEnv() from',
-        'third_party/leveldatabase/leveldb_chrome.h.',
+        'third_party/leveldatabase/leveldb_chrome.h. It exposes environments',
+        "to Chrome's tracing, making their memory usage visible.",
       ),
       True,
       (