diff --git a/tests/test.cpp b/tests/test.cpp
index d12278b..be0d86b 100644
--- a/tests/test.cpp
+++ b/tests/test.cpp
@@ -128,6 +128,9 @@ xpath_node_set_tester::xpath_node_set_tester(const pugi::xpath_node_set& set, co
 {
 	result = set;
 
+	// only sort unsorted sets so that we're able to verify reverse order for some axes
+	if (result.type() == pugi::xpath_node_set::type_unsorted) result.sort();
+
 	if (result.empty())
 	{
 		document_order = 0;
diff --git a/tests/test_xpath_xalan_3.cpp b/tests/test_xpath_xalan_3.cpp
index d1be803..e36788a 100644
--- a/tests/test_xpath_xalan_3.cpp
+++ b/tests/test_xpath_xalan_3.cpp
@@ -59,7 +59,7 @@ TEST_XML_FLAGS(xpath_xalan_axes_2, "<far-north> Level-1<north-north-west1/><nort
 	CHECK_XPATH_NODESET(center, STR("@*/self::node()")) % 21 % 22 % 23;
 	CHECK_XPATH_NODESET(center, STR("@*/.")) % 21 % 22 % 23;
 	CHECK_XPATH_NODESET(center, STR("@*/descendant-or-self::node()")) % 21 % 22 % 23;
-	CHECK_XPATH_NODESET(center, STR("@*/ancestor-or-self::*")) % 21 % 22 % 23 % 2 % 9 % 13 % 20;
+	CHECK_XPATH_NODESET(center, STR("@*/ancestor-or-self::*")) % 2 % 9 % 13 % 20 % 21 % 22 % 23;
 	CHECK_XPATH_NODESET(center, STR("@*/preceding-sibling::node()"));
 	CHECK_XPATH_NODESET(center, STR("@*/following-sibling::*"));
 	CHECK_XPATH_NODESET(center, STR("@*/ancestor::*/near-north/*[4]/@*/preceding::*")) % 4 % 5 % 14 % 15 % 16;