diff --git a/plugins/hg4idea/testData/repo/dot_hg/hgrc b/plugins/hg4idea/testData/repo/dot_hg/hgrc
index 0c817f1bf6a4..88df1f2698d0 100644
--- a/plugins/hg4idea/testData/repo/dot_hg/hgrc
+++ b/plugins/hg4idea/testData/repo/dot_hg/hgrc
@@ -3,3 +3,6 @@ username = John Doe <John.Doe@example.com>
 
 [merge-patterns]
 ** = internal:merge
+
+[extensions]
+sparse=!