diff --git a/bootstrap.php b/bootstrap.php
index 1972d92d3..673f34473 100644
--- a/bootstrap.php
+++ b/bootstrap.php
@@ -5,6 +5,8 @@
  * @package WooCommerce\PayPalCommerce
  */
 
+namespace WooCommerce\PayPalCommerce;
+
 use WooCommerce\PayPalCommerce\Vendor\Inpsyde\Modularity\Package;
 use WooCommerce\PayPalCommerce\Vendor\Inpsyde\Modularity\Properties\PluginProperties;
 use WooCommerce\PayPalCommerce\Vendor\Psr\Container\ContainerInterface;
diff --git a/modules.php b/modules.php
index 792aa636e..21a4e645e 100644
--- a/modules.php
+++ b/modules.php
@@ -5,10 +5,11 @@
  * @package WooCommerce\PayPalCommerce
  */
 
+namespace WooCommerce\PayPalCommerce;
+
 use WooCommerce\PayPalCommerce\PayLaterBlock\PayLaterBlockModule;
 use WooCommerce\PayPalCommerce\PayLaterWCBlocks\PayLaterWCBlocksModule;
 use WooCommerce\PayPalCommerce\PayLaterConfigurator\PayLaterConfiguratorModule;
-use WooCommerce\PayPalCommerce\PluginModule;
 
 return function ( string $root_dir ): iterable {
 	$modules_dir = "$root_dir/modules";
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index d8661df81..6c82069e2 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -48,6 +48,7 @@
 	<file>woocommerce-paypal-payments.php</file>
 	<file>modules.php</file>
 	<file>bootstrap.php</file>
+	<file>scoper.inc.php</file>
 
 	<exclude-pattern>*/node_modules/*</exclude-pattern>
 	<exclude-pattern>*/vendor/*</exclude-pattern>
diff --git a/scoper.inc.php b/scoper.inc.php
new file mode 100644
index 000000000..dd73d2b36
--- /dev/null
+++ b/scoper.inc.php
@@ -0,0 +1,51 @@
+<?php
+/**
+ * The PHP-Scoper configuration.
+ *
+ * @package WooCommerce\PayPalCommerce
+ */
+
+declare(strict_types=1);
+
+namespace WooCommerce\PayPalCommerce;
+
+use Isolated\Symfony\Component\Finder\Finder;
+
+$finders = array(
+	Finder::create()
+		->files()
+		->ignoreVCS( true )
+		->ignoreDotFiles( false ) // We need to keep .distignore around.
+		->exclude(
+			array(
+				'.github',
+				'.ddev',
+				'.idea',
+				'.psalm',
+				'tests',
+			)
+		)
+		->in( '.' ),
+);
+
+return array(
+	'prefix'                  => 'WooCommerce\\PayPalCommerce\\Vendor',
+	'finders'                 => $finders,
+	'patchers'                => array(),
+	'exclude-files'           => array(), // list<string>.
+	'exclude-namespaces'      => array(
+		'/^(?!Psr).*/', // Exclude all namespaces except those starting with "Psr".
+	), // list<string|regex>.
+	'exclude-constants'       => array(), // list<string|regex>.
+	'exclude-classes'         => array(),     // list<string|regex>.
+	'exclude-functions'       => array(), // list<string|regex>.
+
+	'expose-global-constants' => false,   // bool.
+	'expose-global-classes'   => false,     // bool.
+	'expose-global-functions' => false,   // bool.
+
+	'expose-namespaces'       => array(), // list<string|regex>.
+	'expose-constants'        => array(),  // list<string|regex>.
+	'expose-classes'          => array(),    // list<string|regex>.
+	'expose-functions'        => array(),  // list<string|regex>.
+);
diff --git a/uninstall.php b/uninstall.php
index 26fa6cb67..7ae2763b4 100644
--- a/uninstall.php
+++ b/uninstall.php
@@ -7,6 +7,8 @@
 
 declare(strict_types=1);
 
+namespace WooCommerce\PayPalCommerce;
+
 use WooCommerce\PayPalCommerce\Uninstall\ClearDatabaseInterface;
 use WooCommerce\PayPalCommerce\Vendor\Psr\Container\ContainerInterface;
 use WooCommerce\PayPalCommerce\WcGateway\Settings\Settings;