diff --git a/src/pytest_html/report_data.py b/src/pytest_html/report_data.py
index a9889c12..77fdb1b8 100644
--- a/src/pytest_html/report_data.py
+++ b/src/pytest_html/report_data.py
@@ -30,7 +30,7 @@ def __init__(self, config):
                     DeprecationWarning,
                 )
             self.set_data(
-                "collapsed", [outcome.lower() for outcome in collapsed.split(",")]
+                "renderCollapsed", [outcome.lower() for outcome in collapsed.split(",")]
             )
 
     @property
diff --git a/src/pytest_html/scripts/datamanager.js b/src/pytest_html/scripts/datamanager.js
index 25c2c3f8..9ebce446 100644
--- a/src/pytest_html/scripts/datamanager.js
+++ b/src/pytest_html/scripts/datamanager.js
@@ -2,7 +2,7 @@ const { getCollapsedCategory } = require('./storage.js')
 
 class DataManager {
     setManager(data) {
-        const collapsedCategories = [...getCollapsedCategory(data.collapsed)]
+        const collapsedCategories = [...getCollapsedCategory(data.renderCollapsed)]
         const dataBlob = { ...data, tests: Object.values(data.tests).flat().map((test, index) => ({
             ...test,
             id: `test_${index}`,
diff --git a/src/pytest_html/scripts/storage.js b/src/pytest_html/scripts/storage.js
index 33ef3893..fd3cb4d1 100644
--- a/src/pytest_html/scripts/storage.js
+++ b/src/pytest_html/scripts/storage.js
@@ -58,23 +58,23 @@ const setSort = (type) => {
     history.pushState({}, null, unescape(url.href))
 }
 
-const getCollapsedCategory = (config) => {
+const getCollapsedCategory = (renderCollapsed) => {
     let categories
     if (typeof window !== 'undefined') {
         const url = new URL(window.location.href)
         const collapsedItems = new URLSearchParams(url.search).get('collapsed')
         switch (true) {
-        case !config && collapsedItems === null:
+        case !renderCollapsed && collapsedItems === null:
             categories = ['passed']
             break
         case collapsedItems?.length === 0 || /^["']{2}$/.test(collapsedItems):
             categories = []
             break
-        case /^all$/.test(collapsedItems) || collapsedItems === null && /^all$/.test(config):
+        case /^all$/.test(collapsedItems) || collapsedItems === null && /^all$/.test(renderCollapsed):
             categories = [...possibleFilters]
             break
         default:
-            categories = collapsedItems?.split(',').map((item) => item.toLowerCase()) || config
+            categories = collapsedItems?.split(',').map((item) => item.toLowerCase()) || renderCollapsed
             break
         }
     } else {