diff --git a/tests/Exception/AbstractHttpExceptionTest.php b/tests/Exception/AbstractHttpExceptionTest.php
new file mode 100644
index 0000000..925cfe7
--- /dev/null
+++ b/tests/Exception/AbstractHttpExceptionTest.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Gutocf\BrasilAPI\Tests\Exception;
+
+use Gutocf\BrasilAPI\Exception\AbstractHttpException;
+use GuzzleHttp\Psr7\Response;
+use PHPUnit\Framework\TestCase;
+
+class AbstractHttpExceptionTest extends TestCase
+{
+    public function testGetOriginalMessage(): void
+    {
+        $response = new Response(404, [], '{"name":"Not Found"}');
+        $exception = $this->getMockForAbstractClass(AbstractHttpException::class, [
+            $response, 404
+        ]);
+        $originalMessage = $exception->getOriginalMessage();
+        $this->assertEquals('Not Found', $originalMessage->name);
+    }
+}
diff --git a/tests/Service/V1/IbgeServiceTest.php b/tests/Service/V1/IbgeServiceTest.php
index 7ac8abf..ec99818 100644
--- a/tests/Service/V1/IbgeServiceTest.php
+++ b/tests/Service/V1/IbgeServiceTest.php
@@ -35,6 +35,19 @@ public function testGetCitiesByStateNotFound(): void
         $ibgeService->getCitiesByState('invalid');
     }
 
+    public function testGetAllStates(): void
+    {
+        $data = loadFixture('Entity/V1/Ibge/states');
+        $mock = new MockHandler([
+            new Response(200, [], strval(json_encode($data))),
+        ]);
+        $handlerStack = HandlerStack::create($mock);
+        $ibgeService = new IbgeService(new Adapter(new Client(['handler' => $handlerStack])));
+
+        $states = $ibgeService->getAllStates();
+        $this->assertInstanceOf(State::class, $states[0]);
+    }
+
     public function testGetState(): void
     {
         $data = loadFixture('Entity/V1/Ibge/states');