diff --git a/features/configuration/configuring_application_kernel.feature b/features/configuration/configuring_application_kernel.feature
index 4033ebe..4d43179 100644
--- a/features/configuration/configuring_application_kernel.feature
+++ b/features/configuration/configuring_application_kernel.feature
@@ -130,6 +130,29 @@ Feature: Configuring application kernel
         When I run Behat
         Then it should pass
 
+    Scenario: Using environment based on a server variable set in the bootstrap file
+        Given a feature file containing:
+        """
+        Feature:
+            Scenario:
+                And the application kernel should have environment "custom"
+        """
+        And a Behat configuration containing:
+        """
+        default:
+            extensions:
+                FriendsOfBehat\SymfonyExtension:
+                    bootstrap: config/bootstrap.php
+        """
+        And a bootstrap file "config/bootstrap.php" containing:
+        """
+        <?php
+
+        $_SERVER['APP_ENV'] = 'custom';
+        """
+        When I run Behat
+        Then it should pass
+
     Scenario: Using debug based on Behat configuration
         Given a Behat configuration containing:
         """
@@ -201,3 +224,26 @@ Feature: Configuring application kernel
         And an environment variable "APP_DEBUG" set to "1"
         When I run Behat
         Then it should pass
+
+    Scenario: Using debug based on a server variable set in the bootstrap file
+        Given a feature file containing:
+        """
+        Feature:
+            Scenario:
+                And the application kernel should have debug disabled
+        """
+        And a Behat configuration containing:
+        """
+        default:
+            extensions:
+                FriendsOfBehat\SymfonyExtension:
+                    bootstrap: config/bootstrap.php
+        """
+        And a bootstrap file "config/bootstrap.php" containing:
+        """
+        <?php
+
+        $_SERVER['APP_DEBUG'] = '0';
+        """
+        When I run Behat
+        Then it should pass
diff --git a/src/ServiceContainer/SymfonyExtension.php b/src/ServiceContainer/SymfonyExtension.php
index f52df10..8748933 100644
--- a/src/ServiceContainer/SymfonyExtension.php
+++ b/src/ServiceContainer/SymfonyExtension.php
@@ -69,7 +69,7 @@ final class SymfonyExtension implements Extension
 
     public function load(ContainerBuilder $container, array $config): void
     {
-        $container->setParameter('fob_symfony.bootstrap', $config['bootstrap']);
+        $this->processBootstrap($this->autodiscoverBootstrap($config['bootstrap']));
 
         $this->loadKernel($container, $this->autodiscoverKernelConfiguration($config['kernel']));
         $this->loadDriverKernel($container);
@@ -86,7 +86,6 @@ final class SymfonyExtension implements Extension
 
     public function process(ContainerBuilder $container): void
     {
-        $this->processBootstrap($this->autodiscoverBootstrap($container->getParameter('fob_symfony.bootstrap')));
     }
 
     private function registerMinkDriver(ExtensionManager $extensionManager): void