diff --git a/tests/Unit/GraphContractRegistryOnboardingProbesTest.php b/tests/Unit/GraphContractRegistryOnboardingProbesTest.php
new file mode 100644
index 0000000..9467e99
--- /dev/null
+++ b/tests/Unit/GraphContractRegistryOnboardingProbesTest.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Services\Graph\GraphContractRegistry;
+
+it('provides contract registry paths for onboarding verification probes', function (): void {
+    $registry = app(GraphContractRegistry::class);
+
+    $organizationPath = $registry->probePath('organization');
+
+    expect($organizationPath)->not->toBeNull();
+    expect(ltrim((string) $organizationPath, '/'))->toBe('organization');
+
+    $appId = '00000000-0000-0000-0000-000000000000';
+    $servicePrincipalByAppIdPath = $registry->probePath('service_principal_by_app_id', ['{appId}' => $appId]);
+
+    expect($servicePrincipalByAppIdPath)->not->toBeNull();
+    expect((string) $servicePrincipalByAppIdPath)->toContain('servicePrincipals');
+    expect((string) $servicePrincipalByAppIdPath)->toContain($appId);
+
+    $servicePrincipalId = '11111111-1111-1111-1111-111111111111';
+    $assignmentsPath = $registry->probePath('service_principal_app_role_assignments', ['{servicePrincipalId}' => $servicePrincipalId]);
+
+    expect($assignmentsPath)->not->toBeNull();
+    expect((string) $assignmentsPath)->toContain("servicePrincipals/{$servicePrincipalId}/appRoleAssignments");
+});