diff --git a/.github/workflows/mediawiki-tests.yml b/.github/workflows/mediawiki-tests.yml
index 13e91b4b..381e693b 100644
--- a/.github/workflows/mediawiki-tests.yml
+++ b/.github/workflows/mediawiki-tests.yml
@@ -12,17 +12,24 @@ jobs:
     strategy:
       matrix:
         include:
-          # Latest MediaWiki stable - PHP 8.2
+          # Latest MediaWiki stable - PHP 8.1
+          - mw: 'REL1_40'
+            php: 8.1
+            php-docker: 81
+            composer-test: true
+            experimental: false
+
+          # Latest MediaWiki release branch - PHP 8.2
           - mw: 'REL1_41'
-            php: 8.2
-            php-docker: 82
+            php: 8.1
+            php-docker: 81
             composer-test: false
-            experimental: false
+            experimental: true
 
           # Latest MediaWiki master - PHP 8.2
           - mw: 'master'
-            php: 8.2
-            php-docker: 82
+            php: 8.1
+            php-docker: 81
             composer-test: false
             experimental: true