diff --git a/tests/Feature/AdminDashboardBillingWorkbenchButtonsShouldIncludeBackQueryTest.php b/tests/Feature/AdminDashboardBillingWorkbenchButtonsShouldIncludeBackQueryTest.php
new file mode 100644
index 0000000..4229d2e
--- /dev/null
+++ b/tests/Feature/AdminDashboardBillingWorkbenchButtonsShouldIncludeBackQueryTest.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminDashboardBillingWorkbenchButtonsShouldIncludeBackQueryTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_dashboard_billing_workbench_buttons_should_include_back_query(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $res = $this->get('/admin');
+        $res->assertOk();
+
+        $html = (string) $res->getContent();
+
+        $roles = [
+            'dashboard-po-quicklink-bmpa-processable',
+            'dashboard-po-quicklink-syncable',
+            'dashboard-po-quicklink-sync-failed',
+            'dashboard-po-quicklink-paid-no-receipt',
+            'dashboard-po-quicklink-reconcile-mismatch',
+            'dashboard-po-quicklink-refund-inconsistent',
+        ];
+
+        foreach ($roles as $role) {
+            $this->assertMatchesRegularExpression('/<a[^>]*data-role="' . preg_quote($role, '/') . '"[^>]*href="([^"]+)"/u', $html);
+            preg_match('/<a[^>]*data-role="' . preg_quote($role, '/') . '"[^>]*href="([^"]+)"/u', $html, $m);
+            $href = html_entity_decode($m[1] ?? '');
+            $query = parse_url($href, PHP_URL_QUERY) ?: '';
+            parse_str($query, $q);
+
+            $this->assertSame('/admin', (string) ($q['back'] ?? ''));
+        }
+
+        // 避免 Blade 把 URL escape 成 &amp;back=（会导致 back 被错误编码/叠加）
+        $res->assertDontSee('&amp;back=', false);
+    }
+}