diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index e6a785e..de22ff4 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ '8.3', '8.4', '8.5' ]
+        php: [ '8.3', '8.4', '8.5', '8.6' ]
         stability: [ prefer-stable ]
         libvips: [ '8.17.2', '8.18.1' ]