diff --git a/.github/workflows/run-test-suite.yml b/.github/workflows/run-test-suite.yml
index f640feee..07a7b8b7 100644
--- a/.github/workflows/run-test-suite.yml
+++ b/.github/workflows/run-test-suite.yml
@@ -48,7 +48,7 @@ jobs:
     strategy:
       fail-fast: ${{ inputs.fail-fast }}
       matrix:
-        php: [ 8.1, 8.2, 8.3, 8.4 ]
+        php: [ 8.1, 8.2, 8.3, 8.4, 8.5 ]
         os: [ ubuntu-latest ]
         extensions-suffix: [ '', ', protobuf' ]
         dependencies: [ lowest , highest ]