diff --git a/.docker/Dockerfile-php8.5 b/.docker/Dockerfile-php8.5
new file mode 100644
index 0000000..02ed6ab
--- /dev/null
+++ b/.docker/Dockerfile-php8.5
@@ -0,0 +1,8 @@
+FROM php:8.5-cli-alpine
+
+COPY ./../.. /usr/src/myapp
+WORKDIR /usr/src/myapp
+
+RUN apk --no-cache add curl zip
+RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+RUN composer install
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c57d68a..ede3e2c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
+        php-version: ['7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
 
     steps:
       - uses: actions/checkout@v6
diff --git a/README.md b/README.md
index 66afc0a..8948d04 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@
 <a href="https://github.com/rboonzaijer/php-array-to-xml/actions/workflows/tests.yml"><img src="https://shields.io/badge/style-8.2-green?label=php&style=flat-square"></a>
 <a href="https://github.com/rboonzaijer/php-array-to-xml/actions/workflows/tests.yml"><img src="https://shields.io/badge/style-8.3-green?label=php&style=flat-square"></a>
 <a href="https://github.com/rboonzaijer/php-array-to-xml/actions/workflows/tests.yml"><img src="https://shields.io/badge/style-8.4-green?label=php&style=flat-square"></a>
+<a href="https://github.com/rboonzaijer/php-array-to-xml/actions/workflows/tests.yml"><img src="https://shields.io/badge/style-8.5-green?label=php&style=flat-square"></a>
 
 </p>
 
diff --git a/docker-compose.yml b/docker-compose.yml
index 013e9c3..753ed25 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,10 @@
 services:
 
+  php8.5:
+    build:
+      context: .
+      dockerfile: .docker/Dockerfile-php8.5
+
   php8.4:
     build:
       context: .
diff --git a/docker-run-tests.sh b/docker-run-tests.sh
index 1518ede..2c39c15 100755
--- a/docker-run-tests.sh
+++ b/docker-run-tests.sh
@@ -8,4 +8,5 @@ docker compose run --rm php8.1 php ./vendor/bin/phpunit -c tests/phpunit-8.1.xml
 docker compose run --rm php8.2 php ./vendor/bin/phpunit -c tests/phpunit-8.2.xml && \
 docker compose run --rm php8.3 php ./vendor/bin/phpunit -c tests/phpunit-8.3.xml && \
 docker compose run --rm php8.4 php ./vendor/bin/phpunit -c tests/phpunit-8.4.xml && \
+docker compose run --rm php8.5 php ./vendor/bin/phpunit -c tests/phpunit-8.5.xml && \
 echo -e "\n\ndone.\n"
diff --git a/tests/phpunit-8.5.xml b/tests/phpunit-8.5.xml
new file mode 100644
index 0000000..836e8d1
--- /dev/null
+++ b/tests/phpunit-8.5.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- PHPUnit 12	>= PHP 8.3 (https://phpunit.de/supported-versions.html - https://phpunit.de/documentation.html) -->
+<phpunit
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
+        backupGlobals="false" 
+        bootstrap="./../vendor/autoload.php" 
+        colors="true" 
+        processIsolation="false" 
+        stopOnFailure="false" 
+        cacheResult="false" 
+        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/12.4/phpunit.xsd" 
+        cacheDirectory=".phpunit.cache" 
+        backupStaticProperties="false">
+  <testsuites>
+    <testsuite name="PhpArrayToXml Test Suite">
+      <directory>./../tests/</directory>
+    </testsuite>
+  </testsuites>
+  <source>
+    <include>
+      <directory>./../src</directory>
+    </include>
+    <exclude>
+      <directory>./../vendor</directory>
+      <directory>./../tests</directory>
+    </exclude>
+  </source>
+</phpunit>