diff --git a/dvc/repo/__init__.py b/dvc/repo/__init__.py
index 6d98682727..329dafa034 100644
--- a/dvc/repo/__init__.py
+++ b/dvc/repo/__init__.py
@@ -615,4 +615,3 @@ def _reset(self):
         self.__dict__.pop("graph", None)
         self.__dict__.pop("stages", None)
         self.__dict__.pop("pipelines", None)
-        self.tree.__dict__.pop("dvcignore", None)
diff --git a/tests/func/test_tree.py b/tests/func/test_tree.py
index ad09e5312f..a53a515a2e 100644
--- a/tests/func/test_tree.py
+++ b/tests/func/test_tree.py
@@ -258,6 +258,7 @@ def test_walk_dont_ignore_subrepos(tmp_dir, scm, dvc):
     scm.commit("Add subrepo")
 
     dvc_tree = dvc.tree
+    dvc_tree.__dict__.pop("dvcignore")
     scm_tree = scm.get_tree("HEAD", use_dvcignore=True)
     path = os.fspath(tmp_dir)
     get_dirs = itemgetter(1)