diff --git a/packages/coding-standard/tests/Fixer/Spacing/StandaloneLinePromotedPropertyFixer/Fixture/single_promoted_property_among_plain_params.php.inc b/packages/coding-standard/tests/Fixer/Spacing/StandaloneLinePromotedPropertyFixer/Fixture/single_promoted_property_among_plain_params.php.inc
new file mode 100644
index 0000000000..25053b8cc1
--- /dev/null
+++ b/packages/coding-standard/tests/Fixer/Spacing/StandaloneLinePromotedPropertyFixer/Fixture/single_promoted_property_among_plain_params.php.inc
@@ -0,0 +1,31 @@
+<?php
+
+namespace Symplify\CodingStandard\Tests\Fixer\Spacing\StandaloneLinePromotedPropertyFixer\Fixture;
+
+final class SinglePromotedPropertyAmongPlainParams
+{
+    public function __construct(
+        CorePermissions $security, Translator $translator, RouterInterface $router,
+        private LeadModel $leadModel,
+    ) {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Symplify\CodingStandard\Tests\Fixer\Spacing\StandaloneLinePromotedPropertyFixer\Fixture;
+
+final class SinglePromotedPropertyAmongPlainParams
+{
+    public function __construct(
+        CorePermissions $security,
+        Translator $translator,
+        RouterInterface $router,
+        private LeadModel $leadModel,
+    ) {
+    }
+}
+
+?>