diff --git a/projects/mercurial/project.yaml b/projects/mercurial/project.yaml
index 4481a8b26..ed0e521fe 100644
--- a/projects/mercurial/project.yaml
+++ b/projects/mercurial/project.yaml
@@ -7,5 +7,7 @@ auto_ccs:
   - "martinvonz@google.com"
 sanitizers:
   - address
-  - memory
   - undefined
+  # TODO: re-enable memory when we figure out how to work with cpython
+  # and msan at the same time.
+  # - memory