--- a/tests/test.py	Sun Oct 29 11:32:56 2023 +0100
+++ b/tests/test.py	Sun Oct 29 11:36:25 2023 +0100
@@ -2474,6 +2474,30 @@
             u(os.path.join("a", "b", "d")),
             np)
 
+    def test_nested_filter_normpath_posixpath_2(self):
+        p1 = u(os.path.join("a", "b", "C", "d"))
+        cfg1 = {
+            u("path1"): p1,
+            u("path2"): u("{{|{{path1}}/../e|normpath,posixpath|}}")
+        }
+        cfg = cfg = configmix.config.Configuration(cfg1)
+        np = cfg.getvarl_s(u("path2"))
+        self.assertEqual(
+            u(os.path.join("a", "b", "C", "e")),
+            np)
+
+    def test_nested_filter_normpath_posixpath_upper(self):
+        p1 = u(os.path.join("a", "b", "C", "d"))
+        cfg1 = {
+            u("path1"): p1,
+            u("path2"): u("{{|{{path1}}/../e|normpath,posixpath,upper|}}")
+        }
+        cfg = cfg = configmix.config.Configuration(cfg1)
+        np = cfg.getvarl_s(u("path2"))
+        self.assertEqual(
+            u(os.path.join("A", "B", "C", "E")),
+            np)
+
 
 class T09Parser(_TParserMixin, unittest.TestCase):