Add missing virtual namespace to tests

1 files changed, 1 insertions, 1 deletions

diff --git a/setuptools/tests/test_editable_install.py b/setuptools/tests/test_editable_install.py
index e23431f5..a7dbb9a9 100644
--- a/setuptools/tests/test_editable_install.py
+++ b/setuptools/tests/test_editable_install.py
@@ -538,7 +538,7 @@ def test_pkg_roots(tmp_path):
     assert ns == {"f", "f.g"}
 
     ns = set(_find_virtual_namespaces(roots))
-    assert ns == {"a.b.c.x", "a.b.c.x.y", "m", "m.n", "m.n.o", "m.n.o.p"}
+    assert ns == {"a.b", "a.b.c.x", "a.b.c.x.y", "m", "m.n", "m.n.o", "m.n.o.p"}
 
 
 class TestOverallBehaviour: