diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6b14f6cd5..63fcff23a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,7 +2,9 @@ name: ci
 
 on:
   pull_request:
-    branches: [ master ]
+    branches:
+      - master
+      - develop
   push:
     branches:
       - master
@@ -17,11 +19,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - name: Display Python version
diff --git a/tests/unitutil/cxml.py b/tests/unitutil/cxml.py
index 79e217c20..45ff8dcec 100644
--- a/tests/unitutil/cxml.py
+++ b/tests/unitutil/cxml.py
@@ -10,6 +10,7 @@
 
 from pyparsing import (
     Combine,
+    DelimitedList,
     Forward,
     Group,
     Literal,
@@ -18,10 +19,9 @@
     Word,
     alphanums,
     alphas,
-    dblQuotedString,
-    delimitedList,
-    removeQuotes,
-    stringEnd,
+    dbl_quoted_string,
+    remove_quotes,
+    string_end,
 )
 
 from pptx.oxml import parse_xml
@@ -43,8 +43,8 @@ def element(cxel_str: str) -> BaseOxmlElement:
 
 def xml(cxel_str: str) -> str:
     """Return the XML generated from `cxel_str`."""
-    root_node.parseWithTabs()
-    root_token = root_node.parseString(cxel_str)
+    root_node.parse_with_tabs()
+    root_token = root_node.parse_string(cxel_str)
     xml = root_token.element.xml
     return xml
 
@@ -254,28 +254,30 @@ def grammar():
     attr_name = Word(alphas + ":")
     attr_val = Word(alphanums + " %-./:_")
     attr_def = Group(attr_name + equal + attr_val)
-    attr_list = open_brace + delimitedList(attr_def) + close_brace
+    attr_list = open_brace + DelimitedList(attr_def) + close_brace
 
-    text = dblQuotedString.setParseAction(removeQuotes)
+    text = dbl_quoted_string.set_parse_action(remove_quotes)
 
     # w:jc{val=right} ----------------------------
     element = (
         tagname("tagname")
         + Group(Optional(attr_list))("attr_list")
         + Optional(text, default="")("text")
-    ).setParseAction(Element.from_token)
+    ).set_parse_action(Element.from_token)
 
     child_node_list = Forward()
 
     node = Group(
         element("element") + Group(Optional(slash + child_node_list))("child_node_list")
-    ).setParseAction(connect_node_children)
+    ).set_parse_action(connect_node_children)
 
-    child_node_list << (open_paren + delimitedList(node) + close_paren | node)
+    child_node_list << (open_paren + DelimitedList(node) + close_paren | node)
 
     root_node = (
-        element("element") + Group(Optional(slash + child_node_list))("child_node_list") + stringEnd
-    ).setParseAction(connect_root_node_children)
+        element("element")
+        + Group(Optional(slash + child_node_list))("child_node_list")
+        + string_end
+    ).set_parse_action(connect_root_node_children)
 
     return root_node