diff --git a/fstest/test_all/config.yaml b/fstest/test_all/config.yaml
index dd289d531..84cb194c9 100644
--- a/fstest/test_all/config.yaml
+++ b/fstest/test_all/config.yaml
@@ -121,6 +121,8 @@ backends:
      - TestCopyURL
      - TestMoveFileWithIgnoreExisting
      - TestCopyFileCompareDest
+     # fs/sync
+     - TestSyncCompareDest
      #vfs
      - TestFileSetModTime/cache=off,open=false,write=false
      - TestFileSetModTime/cache=off,open=true,write=false