diff -r 97df2e4c68fb -r 5c926801f052 tests/test_tree.c
--- a/tests/test_tree.c	Sun Feb 18 13:16:38 2024 +0100
+++ b/tests/test_tree.c	Sun Feb 18 13:38:42 2024 +0100
@@ -250,6 +250,25 @@
     }
 }
 
+CX_TEST(test_tree_iterator_create) {
+    tree_node root;
+    CX_TEST_DO {
+        CxTreeIterator iter = cx_tree_iterator(&root, false, tree_child_list);
+        CX_TEST_ASSERT(!iter.visit_on_exit);
+        CX_TEST_ASSERT(!iter.exiting);
+        CX_TEST_ASSERT(iter.counter == 1);
+        CX_TEST_ASSERT(iter.node == &root);
+        CX_TEST_ASSERT(!iter.base.mutating);
+        CX_TEST_ASSERT(!iter.base.remove);
+        CX_TEST_ASSERT(iter.stack != NULL);
+        CX_TEST_ASSERT(iter.stack_capacity > 0);
+        CX_TEST_ASSERT(iter.stack_size == 1);
+        CX_TEST_ASSERT(iter.depth == 1);
+        CX_TEST_ASSERT(iter.loc_next == offsetof(tree_node, next));
+        CX_TEST_ASSERT(iter.loc_children == offsetof(tree_node, children));
+    }
+}
+
 CxTestSuite *cx_test_suite_tree_low_level(void) {
     CxTestSuite *suite = cx_test_suite_new("tree (low level)");
 
@@ -258,6 +277,7 @@
     cx_test_register(suite, test_tree_link_move_to_other_parent);
     cx_test_register(suite, test_tree_unlink);
     cx_test_register(suite, test_tree_search);
+    cx_test_register(suite, test_tree_iterator_create);
 
     return suite;
 }