diff --git a/tests/SubdomainTest.php b/tests/SubdomainTest.php
index a7cc58ae..7d69bb20 100644
--- a/tests/SubdomainTest.php
+++ b/tests/SubdomainTest.php
@@ -7,6 +7,7 @@ use Stancl\Tenancy\Database\Concerns\HasDomains;
 use Stancl\Tenancy\Exceptions\NotASubdomainException;
 use Stancl\Tenancy\Middleware\InitializeTenancyBySubdomain;
 use Stancl\Tenancy\Database\Models;
+use Stancl\Tenancy\Resolvers\DomainTenantResolver;
 use function Stancl\Tenancy\Tests\pest;
 
 beforeEach(function () {
@@ -108,6 +109,13 @@ test('we cant use a subdomain that doesnt belong to our central domains', functi
         ->get('http://foo.localhost/foo/abc/xyz');
 });
 
+test('domain resolver correctly determines if string is a subdomain', function() {
+    config(['tenancy.identification.central_domains' => ['app.test']]);
+
+    expect(DomainTenantResolver::isSubdomain('foo.app.test'))->toBeTrue();
+    expect(DomainTenantResolver::isSubdomain('fooapp.test'))->toBeFalse();
+});
+
 class SubdomainTenant extends Models\Tenant
 {
     use HasDomains;