M3 Integration fixes

tests/DuskTestCase.php

@@ -10,6 +10,8 @@ use PHPUnit\Framework\Attributes\BeforeClass;
 
 abstract class DuskTestCase extends BaseTestCase
 {
+    private const LOOPBACK = '127.0.0.1';
+
     use CreatesApplication;
 
     /**
@@ -31,7 +33,7 @@ abstract class DuskTestCase extends BaseTestCase
         if (! static::runningInSail()) {
             static::ensureChromeDriverBinaryAlias();
             static::startChromeDriver(['--port=9515']);
-            static::waitForTcpPort('127.0.0.1', 9515, 8.0, 'ChromeDriver');
+            static::waitForTcpPort(self::LOOPBACK, 9515, 8.0, 'ChromeDriver');
         }
     }
 
@@ -98,7 +100,7 @@ abstract class DuskTestCase extends BaseTestCase
         $parts = parse_url($url);
 
         $scheme = $parts['scheme'] ?? 'http';
-        $host = $parts['host'] ?? '127.0.0.1';
+        $host = $parts['host'] ?? self::LOOPBACK;
         $port = (int) ($parts['port'] ?? ($scheme === 'https' ? 443 : 80));
 
         $useExternalServer = filter_var(
@@ -176,6 +178,7 @@ abstract class DuskTestCase extends BaseTestCase
 
             if (is_bool($value)) {
                 $filtered[$key] = $value ? 'true' : 'false';
+
                 continue;
             }
 
@@ -190,7 +193,7 @@ abstract class DuskTestCase extends BaseTestCase
     private static function availablePort(int $from, int $to): int
     {
         for ($port = $from; $port <= $to; $port++) {
-            if (! static::canConnect('127.0.0.1', $port)) {
+            if (! static::canConnect(self::LOOPBACK, $port)) {
                 return $port;
             }
         }