diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index d9f972d..bd43aeb 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         powerdns-versions: ["42", "43", "44", "45", "46", "47"]
-        php-versions: ["7.3", "7.4", "8.0", "8.1", "8.2"]
+        php-versions: ["7.3", "7.4", "8.0", "8.1", "8.2", "8.3"]
 
     services:
       powerdns:
diff --git a/run-tests.sh b/run-tests.sh
index e2512fd..15c35fd 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -61,7 +61,7 @@ else
         RESULTS="$RESULTS\n"
     done
     # Run tests for all supported PHP 8 / PowerDNS 4 combinations.
-    for phpversion in {0..2}; do
+    for phpversion in {0..3}; do
         for pdnsversion in {2..7}; do
             run "8.$phpversion" "4.$pdnsversion"
         done