diff --git a/preprocess_schemas.py b/preprocess_schemas.py
index a9bba53..93b34a6 100644
--- a/preprocess_schemas.py
+++ b/preprocess_schemas.py
@@ -49,7 +49,11 @@ def iter_nodes(root):
         # Identify children for the next iteration
         children = []
         if isinstance(curr, dict):
-            children = curr.values()
+            for k, v in curr.items():
+                if k == "properties" and isinstance(v, dict):
+                    children.extend(v.values())
+                else:
+                    children.append(v)
         elif isinstance(curr, list):
             children = curr
 
diff --git a/tests/test_codegen_pipeline.py b/tests/test_codegen_pipeline.py
index e708e3e..eba1f0c 100644
--- a/tests/test_codegen_pipeline.py
+++ b/tests/test_codegen_pipeline.py
@@ -55,6 +55,27 @@
 class SchemaNormalizationTest(unittest.TestCase):
     """Tests schema flattening and reference normalization."""
 
+    def test_iter_nodes_expands_properties_without_yielding_container(
+        self,
+    ) -> None:
+        """iter_nodes yields "properties" map values directly rather than the "properties" map as a container. Avoids traversal of property names that match json schema keywords."""
+        schema = {
+            "type": "object",
+            "properties": {
+                "user": {"type": "string", "$ref": "user.json"},
+                "allOf": {"type": "object"},
+            },
+        }
+        nodes = list(preprocess_schemas.iter_nodes(schema))
+
+        # The root object is yielded
+        self.assertIn(schema, nodes)
+        # The property subschemas are yielded
+        self.assertIn(schema["properties"]["user"], nodes)
+        self.assertIn(schema["properties"]["allOf"], nodes)
+        # The container map {"user": ..., "allOf": ...} itself is NOT yielded
+        self.assertNotIn(schema["properties"], nodes)
+
     def test_resolve_local_ref_supports_objects_and_arrays(self) -> None:
         """Local JSON pointers resolve object keys and array indexes."""
         schema = {"$defs": {"choices": [{"const": "first"}]}}
@@ -1665,7 +1686,8 @@ def test_injects_cleanly_when_annotated_is_line_wrapped(self):
         wrap the annotation onto multiple lines with a trailing comma; a
         naive "insert before the closing bracket" splice then lands after
         that comma and produces "Field(...),\\n, AfterValidator(...)]" -
-        two commas with nothing between them, a SyntaxError)."""
+        two commas with nothing between them, a SyntaxError).
+        """
         out = postprocess_models.inject_array_contains(
             self.MODULE_LINE_WRAPPED, "TotalsCreateRequest", self.GROUPS
         )