diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index a90c85ee..3fa38c6b 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -141,6 +141,10 @@ jobs:
             php-version: "8.3"
             dependencies: "locked"
             experimental: false
+          - operating-system: "ubuntu-20.04"
+            php-version: "8.4"
+            dependencies: "highest"
+            experimental: true
 
     steps:
       - name: "Checkout"