diff --git a/.github/workflows/acceptance-tests.yml b/.github/workflows/acceptance-tests.yml
index 08224671..e30814ee 100644
--- a/.github/workflows/acceptance-tests.yml
+++ b/.github/workflows/acceptance-tests.yml
@@ -54,6 +54,9 @@ jobs:
           - '8.3'
           - '7.4'
         include:
+          # Latest WordPress on PHP 8.5
+          - wp: '6.8'
+            php: '8.5'
           # Latest WordPress on PHP 8.4
           - wp: '6.8'
             php: '8.4'
diff --git a/.github/workflows/coding-standards.yml b/.github/workflows/coding-standards.yml
index 1aac71ad..82b94142 100644
--- a/.github/workflows/coding-standards.yml
+++ b/.github/workflows/coding-standards.yml
@@ -44,6 +44,7 @@ jobs:
         label:
           - 'PHP'
         php:
+          - '8.5'
           - '8.4'
       fail-fast: false
     with:
diff --git a/.github/workflows/integration-tests.yml b/.github/workflows/integration-tests.yml
index 6b012b5e..7a240eb4 100644
--- a/.github/workflows/integration-tests.yml
+++ b/.github/workflows/integration-tests.yml
@@ -55,6 +55,9 @@ jobs:
           - '8.3'
           - '7.4'
         include:
+          # Latest WordPress on PHP 8.5
+          - wp: '6.8'
+            php: '8.5'
           # Latest WordPress on PHP 8.4
           - wp: '6.8'
             php: '8.4'
diff --git a/classes/Collector_Assets.php b/classes/Collector_Assets.php
index 3d1039b6..cfc0a069 100644
--- a/classes/Collector_Assets.php
+++ b/classes/Collector_Assets.php
@@ -283,13 +283,13 @@ protected static function get_script_modules(): ?array {
 		$reflector = new ReflectionClass( $modules );
 
 		$get_marked_for_enqueue = $reflector->getMethod( 'get_marked_for_enqueue' );
-		$get_marked_for_enqueue->setAccessible( true );
+		( \PHP_VERSION_ID < 80100 ) && $get_marked_for_enqueue->setAccessible( true );
 
 		$get_dependencies = $reflector->getMethod( 'get_dependencies' );
-		$get_dependencies->setAccessible( true );
+		( \PHP_VERSION_ID < 80100 ) && $get_dependencies->setAccessible( true );
 
 		$get_src = $reflector->getMethod( 'get_src' );
-		$get_src->setAccessible( true );
+		( \PHP_VERSION_ID < 80100 ) && $get_src->setAccessible( true );
 
 		/**
 		 * @var array<string, array<string, mixed>> $enqueued
@@ -365,9 +365,9 @@ protected static function get_script_modules(): ?array {
 		}
 
 		// @todo check isPrivate before changing visibility back
-		$get_marked_for_enqueue->setAccessible( false );
-		$get_dependencies->setAccessible( false );
-		$get_src->setAccessible( false );
+		( \PHP_VERSION_ID < 80100 ) && $get_marked_for_enqueue->setAccessible( false );
+		( \PHP_VERSION_ID < 80100 ) && $get_dependencies->setAccessible( false );
+		( \PHP_VERSION_ID < 80100 ) && $get_src->setAccessible( false );
 
 		return $sources;
 	}