diff --git a/core/modules/layout_builder/tests/modules/layout_builder_test/src/Plugin/SectionStorage/SimpleConfigSectionStorage.php b/core/modules/layout_builder/tests/modules/layout_builder_test/src/Plugin/SectionStorage/SimpleConfigSectionStorage.php
index fb7345c1a7..9de5f2561a 100644
--- a/core/modules/layout_builder/tests/modules/layout_builder_test/src/Plugin/SectionStorage/SimpleConfigSectionStorage.php
+++ b/core/modules/layout_builder/tests/modules/layout_builder_test/src/Plugin/SectionStorage/SimpleConfigSectionStorage.php
@@ -101,7 +101,7 @@ protected function getConfigName() {
   public function getSections() {
     if (is_null($this->sections)) {
       $sections = $this->configFactory->get($this->getConfigName())->get('sections') ?: [];
-      $this->sections = array_map([Section::class, 'fromArray'], $sections);
+      $this->setSections(array_map([Section::class, 'fromArray'], $sections));
     }
     return $this->sections;
   }
@@ -120,7 +120,7 @@ protected function setSections(array $sections) {
   public function save() {
     $sections = array_map(function (Section $section) {
       return $section->toArray();
-    }, $this->sections);
+    }, $this->getSections());
 
     $config = $this->configFactory->getEditable($this->getConfigName());
     $return = $config->get('sections') ? SAVED_UPDATED : SAVED_NEW;