diff --git a/tests/Feature/EnsurePlatformSessionTest.php b/tests/Feature/EnsurePlatformSessionTest.php
new file mode 100644
index 0000000..be27491
--- /dev/null
+++ b/tests/Feature/EnsurePlatformSessionTest.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Http;
+use Tests\TestCase;
+
+class EnsurePlatformSessionTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_skips_auth_ping_when_recently_verified(): void
+    {
+        config(['app.auth_domain' => 'auth.ladill.com']);
+
+        $user = User::create([
+            'public_id' => 'session-test-001',
+            'name' => 'Tester',
+            'email' => 'session-test@example.com',
+            'password' => bcrypt('password'),
+        ]);
+
+        Http::fake();
+
+        $this->actingAs($user)
+            ->withSession(['platform_session_verified_at' => time()])
+            ->get(route('qms.dashboard'))
+            ->assertRedirect();
+
+        Http::assertNothingSent();
+    }
+
+    public function test_pings_auth_when_verification_expired(): void
+    {
+        config(['app.auth_domain' => 'auth.ladill.com']);
+
+        $user = User::create([
+            'public_id' => 'session-test-002',
+            'name' => 'Tester',
+            'email' => 'session-test-2@example.com',
+            'password' => bcrypt('password'),
+        ]);
+
+        Http::fake([
+            'https://auth.ladill.com/sso/ping' => Http::response('', 204),
+        ]);
+
+        $this->actingAs($user)
+            ->withSession(['platform_session_verified_at' => time() - 120])
+            ->withHeader('Cookie', 'laravel_session=fake-session-id')
+            ->get(route('qms.dashboard'))
+            ->assertRedirect();
+
+        Http::assertSentCount(1);
+    }
+}