diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index eb6a0ae6..6280223a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -77,6 +77,8 @@ jobs:
         include:
           - php: '8.3'
             moodle-branch: 'main'
+          - php: '8.3'
+            moodle-branch: 'MOODLE_404_STABLE'
           - php: '8.2'
             moodle-branch: 'MOODLE_403_STABLE'
           - php: '8.2'
@@ -194,6 +196,8 @@ jobs:
           # Each supported PHP version once. That's enough.
           - php: '8.3'
             moodle-branch: 'main'
+          - php: '8.3'
+            moodle-branch: 'MOODLE_404_STABLE'
           - php: '8.2'
             moodle-branch: 'MOODLE_403_STABLE'
           - php: '8.1'
diff --git a/.travis.yml b/.travis.yml
index 950daa9f..2d27b03d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -93,8 +93,8 @@ jobs:
     - php: 8.3
       env: MOODLE_BRANCH=main
     # Last stable with highest supported PHP version.
-    - php: 8.2
-      env: MOODLE_BRANCH=MOODLE_403_STABLE
+    - php: 8.3
+      env: MOODLE_BRANCH=MOODLE_404_STABLE
     # And older stable supported (with lowest supported PHP version).
     - php: 7.4
       env: MOODLE_BRANCH=MOODLE_39_STABLE