diff --git a/.circleci/config.yml b/.circleci/config.yml
index e647616e..37eb91a6 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,11 +2,11 @@ version: 2
 jobs:
   build:
     machine:
-      image: ubuntu-2004:current
+      image: ubuntu-2204:2023.10.1
     parallelism: 1
     steps:
       - checkout
       - run:
-          docker-compose up
+          docker compose up
       - store_artifacts:
           path: docs/wip
diff --git a/requirements.txt b/requirements.txt
index 670be700..715f6c72 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,3 @@
-docker-compose==1.29.2
 pip==23.3.1
 python-docx==1.1.0
 python-pptx==0.6.23
diff --git a/src/builder/xlsx_builder.py b/src/builder/xlsx_builder.py
index 7783f640..c8d73887 100644
--- a/src/builder/xlsx_builder.py
+++ b/src/builder/xlsx_builder.py
@@ -53,7 +53,7 @@ def start_element(self, tag: str, attributes: TreeBuilderAttributes) -> None:
         super().start_element(tag, attributes)
         if tag == xmltags.DOCUMENT:
             self.__create_checklist(str(attributes["version"]))
-        elif tag == xmltags.MEASURE and not self.in_element(xmltags.SECTION, {xmltags.SECTION_IS_APPENDIX: "y"}):
+        elif tag == xmltags.MEASURE and not self.__in_appendix():
             if self.last_level_1_section_heading:
                 self.row += 1
                 self.checklist.merge_range(
@@ -77,9 +77,7 @@ def text(self, tag: str, text: str, attributes: TreeBuilderAttributes) -> None:
         text = re.sub("[¹²³⁴⁵⁶⁷⁸⁹⁰]+", "", text)  # Remove footnotes
         if tag == xmltags.HEADING and self.nr_elements(xmltags.SECTION) == 1:
             self.last_level_1_section_heading = text
-        elif self.in_element(xmltags.MEASURE) and not self.in_element(
-            xmltags.SECTION, {xmltags.SECTION_IS_APPENDIX: "y"}
-        ):
+        elif self.in_element(xmltags.MEASURE) and not self.__in_appendix():
             if tag == xmltags.BOLD:
                 self.measure_row = self.row
                 self.measure_id, measure_title = text.split(":")
@@ -224,3 +222,7 @@ def __create_action_list(self) -> None:
         for column, (header, width) in enumerate([("Datum", 12), ("Actie", 70), ("Status", 20), ("Toelichting", 70)]):
             action_list.write(1, column, header, self.formats["header"])
             action_list.set_column(f"{'ABCD'[column]}:{'ABCD'[column]}", width)
+
+    def __in_appendix(self) -> bool:
+        """Return whether the current section is in an appendix."""
+        return self.in_element(xmltags.SECTION, {xmltags.SECTION_IS_APPENDIX: "y"})
diff --git a/tests/__init__.py b/tests/__init__.py
index e69de29b..5fd2714a 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -0,0 +1,6 @@
+"""Prepare the unit tests."""
+
+import sys
+
+
+sys.path.append("src")