diff --git a/.gitignore b/.gitignore
index fbd8c44dc3fb585d92bd60c462e846db719e59fd..9f152db11315d8eb4c86461b2f3b305a8a977a3b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -49,3 +49,4 @@ reviewboard/scmtools/testdata/hg_repo/.hg/cache/branch2-served
 reviewboard/scmtools/testdata/hg_repo/.hg/cache/tags2-visible
 reviewboard/scmtools/testdata/hg_repo/.hg/cache/rbc-names-v1
 reviewboard/scmtools/testdata/hg_repo/.hg/cache/rbc-revs-v1
+reviewboard/scmtools/testdata/hg_repo/.hg/wcache/
\ No newline at end of file