diff -r 948fac24bc39 -r 8c66a680f396 tests/test-check-interfaces.py
--- a/tests/test-check-interfaces.py	Thu Apr 02 13:04:41 2020 -0400
+++ b/tests/test-check-interfaces.py	Mon Feb 03 22:17:19 2020 -0500
@@ -211,6 +211,7 @@
 
     ziverify.verifyClass(repository.ifilestorage, filelog.filelog)
     ziverify.verifyClass(repository.imanifestdict, manifest.manifestdict)
+    ziverify.verifyClass(repository.imanifestdict, manifest.treemanifest)
     ziverify.verifyClass(
         repository.imanifestrevisionstored, manifest.manifestctx
     )