diff --git a/tests/app.spec.mjs b/tests/app.spec.mjs
index aef0992..08e22e1 100644
--- a/tests/app.spec.mjs
+++ b/tests/app.spec.mjs
@@ -65,6 +65,32 @@ test('v17.6.2 operations UX boots with menu and route features', async ({ page }
   expect(checks.calendarMore).toBeTruthy();
   expect(await page.locator('header nav button', {hasText:'Меню'}).count()).toBeGreaterThan(0);
 });
+test('v17.6.3 developer gate bypasses workspace loading and SaaS click is safe', async ({ page }) => {
+  await page.goto('/index.html', { waitUntil:'domcontentloaded' });
+  await page.evaluate(()=>{
+    document.body.innerHTML='<div id="sunCloudAuthGateV3"><div class="sun-cloud-auth-card"><h2>Загружаю рабочую базу</h2></div></div><button type="button" data-saas-admin>Управление SaaS</button>';
+    window.__devOpenArgs=[];
+    window.SunCloudV2={
+      getSession:()=>({user:{id:'dev',email:'developer@example.com'}}),
+      getWorkspace:()=>null,
+      status:()=>({membershipsLoading:true,membershipsLoaded:false}),
+      signOut:()=>{}
+    };
+    window.SunDeveloperV22={
+      open:arg=>{window.__devOpenArgs.push(arg===null?'null':arg?.constructor?.name||typeof arg)},
+      isPlatformAdmin:()=>true,
+      checkPlatformAdmin:async()=>true
+    };
+  });
+  const content=fs.readFileSync(path.join(process.cwd(),'public','core','hotfix-v1763.js'),'utf8');
+  await page.addScriptTag({content});
+  await page.waitForFunction(()=>document.querySelector('[data-open-dev-v1763]')&&Boolean(window.SunHotfixV1763),null,{timeout:5000});
+  expect(await page.locator('#sunCloudAuthGateV3 h2').textContent()).toBe('Аккаунт разработчика');
+  await page.locator('[data-saas-admin]').click();
+  await page.locator('[data-open-dev-v1763]').click();
+  const args=await page.evaluate(()=>window.__devOpenArgs);
+  expect(args).toEqual(['null','null']);
+});
 test('mobile body does not overflow viewport', async ({ page }, testInfo) => {
   test.skip(testInfo.project.name!=='mobile-390'); await page.goto('/index.html', { waitUntil:'domcontentloaded' }); await page.waitForTimeout(500);
   const dims=await page.evaluate(()=>({innerWidth,scrollWidth:document.documentElement.scrollWidth,bodyWidth:document.body.scrollWidth}));