diff --git a/src/Symfony/Component/Ldap/Tests/LdapTestCase.php b/src/Symfony/Component/Ldap/Tests/LdapTestCase.php
index 45605cd4c4891..39b9184c64c83 100644
--- a/src/Symfony/Component/Ldap/Tests/LdapTestCase.php
+++ b/src/Symfony/Component/Ldap/Tests/LdapTestCase.php
@@ -17,7 +17,12 @@ class LdapTestCase extends TestCase
 {
     protected function getLdapConfig()
     {
-        $h = @ldap_connect(getenv('LDAP_HOST'), getenv('LDAP_PORT'));
+        if (\PHP_VERSION_ID < 80300) {
+            $h = @ldap_connect(getenv('LDAP_HOST'), getenv('LDAP_PORT'));
+        } else {
+            $h = @ldap_connect('ldap://'.getenv('LDAP_HOST').':'.getenv('LDAP_PORT'));
+        }
+
         @ldap_set_option($h, \LDAP_OPT_PROTOCOL_VERSION, 3);
 
         if (!$h || !@ldap_bind($h)) {