diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..e5bc08c
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,31 @@
+ARG PHP_VERSION
+
+FROM php:${PHP_VERSION}-cli-alpine AS php
+
+WORKDIR /app
+
+RUN set -eux; \
+	apk add --no-cache --virtual .build-deps \
+		$PHPIZE_DEPS \
+      	linux-headers \
+    ; \
+	\
+    pecl install xdebug; \
+    docker-php-ext-enable xdebug; \
+	pecl clear-cache; \
+	runDeps="$( \
+		scanelf --needed --nobanner --format '%n#p' --recursive /usr/local/lib/php/extensions \
+			| tr ',' '\n' \
+			| sort -u \
+			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
+	)"; \
+	apk add --no-cache --virtual .app-phpexts-rundeps $runDeps; \
+	\
+	apk del .build-deps
+
+
+# https://getcomposer.org/doc/03-cli.md#composer-allow-superuser
+ENV COMPOSER_ALLOW_SUPERUSER=1
+ENV PATH="${PATH}:/root/.composer/vendor/bin"
+
+COPY --from=composer/composer:2-bin --link /composer /usr/bin/composer
diff --git a/compose.yml b/compose.yml
new file mode 100644
index 0000000..88d557f
--- /dev/null
+++ b/compose.yml
@@ -0,0 +1,36 @@
+x-params:
+    - &common
+        environment:
+            XDEBUG_MODE: coverage
+        volumes:
+            - ./:/app
+        command:
+            - sh
+            - -c
+            - 'rm -f composer.lock && rm -rf tests/Bundle/App/var/cache && composer install && vendor/bin/simple-phpunit --coverage-text'
+            
+# To run test just exec e.g. 'docker compose run --rm php8.1'
+services:
+    php8.1:
+        build:
+            context: .
+            target: php
+            args:
+                PHP_VERSION: 8.1
+        <<: *common
+            
+    php8.2:
+        build:
+            context: .
+            target: php
+            args:
+                PHP_VERSION: 8.2
+        <<: *common
+            
+    php8.3:
+        build:
+            context: .
+            target: php
+            args:
+                PHP_VERSION: 8.3
+        <<: *common
diff --git a/composer.json b/composer.json
index eb992f2..44d1330 100644
--- a/composer.json
+++ b/composer.json
@@ -20,13 +20,13 @@
     ],
     "require": {
         "php": ">=7.4",
-        "symfony/dependency-injection": "^4.4|^5.0|^6.0"
+        "symfony/dependency-injection": "^4.4|^5.0|^6.0|^7.0"
     },
     "require-dev": {
-        "symfony/framework-bundle": "^4.4|^5.0|^6.0",
-        "symfony/phpunit-bridge": "^4.4|^5.0|^6.0",
-        "symfony/browser-kit": "^4.4|^5.0|^6.0",
-        "symfony/yaml": "^4.4|^5.0|^6.0"
+        "symfony/framework-bundle": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/phpunit-bridge": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/browser-kit": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/yaml": "^4.4|^5.0|^6.0|^7.0"
     },
     "autoload": {
         "psr-4": { "PrismaMedia\\Metrics\\": "src/" }
diff --git a/tests/MetricAggregatorTest.php b/tests/MetricAggregatorTest.php
index ecde6a4..2b49995 100644
--- a/tests/MetricAggregatorTest.php
+++ b/tests/MetricAggregatorTest.php
@@ -40,6 +40,6 @@ public function getMetrics(): iterable
         $metrics = $aggregator->getMetrics();
 
         $this->assertInstanceOf(\Generator::class, $metrics);
-        $this->assertCount(3, $metrics);
+        $this->assertEquals(3, iterator_count($metrics));
     }
 }
diff --git a/tests/MetricLabellerTest.php b/tests/MetricLabellerTest.php
index e4197bf..2cbc657 100644
--- a/tests/MetricLabellerTest.php
+++ b/tests/MetricLabellerTest.php
@@ -25,7 +25,7 @@ public function getMetrics(): \Traversable
         $labeller = new MetricLabeller($metrics, ['env' => 'staging']);
 
         $this->assertInstanceOf(\Generator::class, $labeller->getMetrics());
-        $this->assertCount(3, $labeller->getMetrics());
+        $this->assertEquals(3, iterator_count($labeller->getMetrics()));
         $metrics = iterator_to_array($labeller->getMetrics());
 
         $this->assertSame('article_total', $metrics[0]->getName());
diff --git a/tests/allowed.json b/tests/allowed.json
index cb78ad2..ebd6d09 100644
--- a/tests/allowed.json
+++ b/tests/allowed.json
@@ -3,5 +3,20 @@
         "location": "PrismaMedia\\Metrics\\Tests\\Bundle\\FunctionalTest::testEndpointMetrics",
         "message": "Since symfony/framework-bundle 5.1: Not setting the \"framework.router.utf8\" configuration option is deprecated, it will default to \"true\" in version 6.0.",
         "count": 1
+    },
+    {
+      "location": "PrismaMedia\\Metrics\\Tests\\Bundle\\FunctionalTest::testEndpointMetrics",
+      "message": "Since symfony/framework-bundle 6.1: Not setting the \"framework.http_method_override\" config option is deprecated. It will default to \"false\" in 7.0.",
+      "count": 2
+    },
+    {
+      "location": "PrismaMedia\\Metrics\\Tests\\Bundle\\FunctionalTest::testEndpointMetrics",
+      "message": "Since symfony/framework-bundle 6.4: Not setting the \"framework.handle_all_throwables\" config option is deprecated. It will default to \"true\" in 7.0.",
+      "count": 2
+    },
+    {
+      "location": "PrismaMedia\\Metrics\\Tests\\Bundle\\FunctionalTest::testEndpointMetrics",
+      "message": "Since symfony/framework-bundle 6.4: Not setting the \"framework.php_errors.log\" config option is deprecated. It will default to \"true\" in 7.0.",
+      "count": 2
     }
-]
\ No newline at end of file
+]