diff --git a/tests/src/Kernel/Service/UserCounterTest.php b/tests/src/Kernel/Service/UserCounterTest.php
new file mode 100644
index 0000000..92fa881
--- /dev/null
+++ b/tests/src/Kernel/Service/UserCounterTest.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace Drupal\Tests\autowire_example\Kernel\Service;
+
+use Drupal\autowire_example\Service\UserCounter;
+use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
+
+/**
+ * Test the user counter service.
+ */
+class UserCounterTest extends EntityKernelTestBase {
+
+  /**
+   * The user counter service.
+   *
+   * @var \Drupal\autowire_example\Service\UserCounter
+   */
+  private $userCounter;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['autowire_example'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->userCounter = $this->container->get(UserCounter::class);
+  }
+
+  /** @test */
+  public function active_users_are_counted() {
+    $this->createUser(['status' => 1]);
+    $this->createUser(['status' => 1]);
+
+    $this->assertEquals(2, $this->userCounter->getActiveUserCount());
+  }
+
+  /** @test */
+  public function blocked_users_are_not_counted() {
+    $this->createUser(['status' => 1]);
+    $this->createUser(['status' => 0]);
+
+    $this->assertEquals(1, $this->userCounter->getActiveUserCount());
+  }
+
+}