diff --git a/Test/AbstractElasticsearchTestCase.php b/Test/AbstractElasticsearchTestCase.php
index 9d5a2ef1..f3d7d28b 100644
--- a/Test/AbstractElasticsearchTestCase.php
+++ b/Test/AbstractElasticsearchTestCase.php
@@ -13,7 +13,6 @@
 
 use ONGR\ElasticsearchBundle\Service\Manager;
 use ONGR\ElasticsearchBundle\Tests\WebTestCase;
-use Symfony\Component\DependencyInjection\Container;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -170,7 +169,7 @@ protected function doTearDown()
      *
      * @return ContainerInterface
      */
-    protected static function getContainer(): Container
+    protected static function getKernelContainer(): ContainerInterface
     {
         if (null === self::$container) {
             self::bootKernel();
@@ -198,9 +197,9 @@ protected function getManager($name = 'default')
             $this->ignoreVersions($this->managers[$name]);
 
             return $this->managers[$name];
-        } elseif ($this->getContainer()->has($serviceName)) {
+        } elseif ($this->getKernelContainer()->has($serviceName)) {
             /** @var Manager $manager */
-            $manager = $this->getContainer()->get($serviceName);
+            $manager = $this->getKernelContainer()->get($serviceName);
             $this->managers[$name] = $manager;
         } else {
             throw new \LogicException(sprintf("Manager '%s' does not exist", $name));
diff --git a/Tests/Functional/Command/CreateIndexCommandTest.php b/Tests/Functional/Command/CreateIndexCommandTest.php
index 4ed7e8e4..d37aada0 100644
--- a/Tests/Functional/Command/CreateIndexCommandTest.php
+++ b/Tests/Functional/Command/CreateIndexCommandTest.php
@@ -186,7 +186,7 @@ public function testIndexMappingDump()
     private function getCommandTester()
     {
         $indexCreateCommand = new IndexCreateCommand(
-            $this->getContainer()->get('es.client.index_suffix_finder'),
+            $this->getKernelContainer()->get('es.client.index_suffix_finder'),
             ['es.manager.default' => $this->getManager()]
         );
 
diff --git a/Tests/Functional/Command/IndexExportCommandTest.php b/Tests/Functional/Command/IndexExportCommandTest.php
index 3513127b..29df04b1 100644
--- a/Tests/Functional/Command/IndexExportCommandTest.php
+++ b/Tests/Functional/Command/IndexExportCommandTest.php
@@ -163,7 +163,7 @@ public function testIndexExport($options, $expectedResults)
     private function getCommandTester()
     {
         $indexExportCommand = new IndexExportCommand(
-            $this->getContainer()->get('es.export'),
+            $this->getKernelContainer()->get('es.export'),
             ['es.manager.default' => $this->getManager()]
         );
 
diff --git a/Tests/Functional/Command/IndexImportCommandTest.php b/Tests/Functional/Command/IndexImportCommandTest.php
index 6822e19d..40eba3ed 100644
--- a/Tests/Functional/Command/IndexImportCommandTest.php
+++ b/Tests/Functional/Command/IndexImportCommandTest.php
@@ -143,7 +143,7 @@ public function testIndexImportWithGzipOption($bulkSize, $realSize, $filename)
     private function getImportCommand()
     {
         return new IndexImportCommand(
-            $this->getContainer()->get('es.import'),
+            $this->getKernelContainer()->get('es.import'),
             ['es.manager.default' => $this->getManager()]
         );
     }
diff --git a/Tests/Functional/Mapping/DocumentFinderTest.php b/Tests/Functional/Mapping/DocumentFinderTest.php
index f53b3631..d5b71b55 100644
--- a/Tests/Functional/Mapping/DocumentFinderTest.php
+++ b/Tests/Functional/Mapping/DocumentFinderTest.php
@@ -23,7 +23,7 @@ class DocumentFinderTest extends WebTestCase
      */
     public function testGetBundleDocumentClasses()
     {
-        $finder = new DocumentFinder($this->getContainer()->getParameter('kernel.bundles'));
+        $finder = new DocumentFinder($this->getClientContainer()->getParameter('kernel.bundles'));
         $this->assertGreaterThan(0, count($finder->getBundleDocumentClasses('TestBundle')));
         $this->assertEquals(0, count($finder->getBundleDocumentClasses('FrameworkBundle')));
     }
@@ -36,7 +36,7 @@ public function testGetBundleClassException()
         $this->expectException(\LogicException::class);
         $this->expectExceptionMessage('Bundle \'NotExistingBundle\' does not exist.');
 
-        $finder = new DocumentFinder($this->getContainer()->getParameter('kernel.bundles'));
+        $finder = new DocumentFinder($this->getClientContainer()->getParameter('kernel.bundles'));
         $finder->getBundleClass('NotExistingBundle');
     }
 
@@ -45,7 +45,7 @@ public function testGetBundleClassException()
      *
      * @return ContainerInterface
      */
-    protected static function getContainer(): Container
+    protected static function getClientContainer(): ContainerInterface
     {
         return static::createClient()->getContainer();
     }
diff --git a/Tests/Functional/Profiler/ElasticsearchProfilerTest.php b/Tests/Functional/Profiler/ElasticsearchProfilerTest.php
index a2fcefab..0d9c786f 100644
--- a/Tests/Functional/Profiler/ElasticsearchProfilerTest.php
+++ b/Tests/Functional/Profiler/ElasticsearchProfilerTest.php
@@ -172,7 +172,7 @@ public function checkQueryParameters(&$query)
      */
     private function getCollector()
     {
-        $collector = $this->getContainer()->get('es.profiler');
+        $collector = $this->getKernelContainer()->get('es.profiler');
         $collector->collect(new Request(), new Response());
 
         return $collector;
diff --git a/composer.json b/composer.json
index f81f1463..c4ced674 100644
--- a/composer.json
+++ b/composer.json
@@ -53,5 +53,12 @@
     "replace": {
         "ongr/elasticsearch-bundle": "self.version"
     },
-    "minimum-stability": "dev"
+    "minimum-stability": "dev",
+    "extra": {
+        "symfony": {
+            "recipe-contrib": false,
+            "allow-contrib": false,
+            "require": "7.1.*"
+        }
+    }
 }
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 3c612269..a4001ad9 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -24,7 +24,7 @@
 
     <php>
         <server name="KERNEL_DIR" value="Tests/app/" />
-        <server name="APP_ENV" value="test" force="true"/>
+        <env name="APP_ENV" value="test" force="true"/>
         <env name="SYMFONY_DEPRECATIONS_HELPER" value="weak"/>
     </php>