https://bugs.gentoo.org/982101
--- a/tests/test-sandbox.py
+++ b/tests/test-sandbox.py
@@ -309,7 +309,7 @@ class TestSandbox(unittest.TestCase):
     @in_sandbox()
     def test_ro_bind_root_is_recursive(self):
         """The base --ro-bind / / should apply read-only to sub-mounts."""
-        skip_prefixes = ('/dev', '/proc', '/sys', '/tmp')
+        skip_prefixes = ('/dev', '/proc', '/sys', '/tmp', '/run')
         for mountpoint in list_mounts():
             if any(mountpoint == p or mountpoint.startswith(p + '/')
                    for p in skip_prefixes):