diff --git a/src/AiwassMsgPack.php b/src/AiwassMsgPack.php
index 0d18b72..0f13189 100644
--- a/src/AiwassMsgPack.php
+++ b/src/AiwassMsgPack.php
@@ -6,6 +6,7 @@
 namespace Aiwass;
 
 use MessagePack;
+
 /**
  * Internal container for MessagePack class.
  *
@@ -20,7 +21,7 @@ final class AiwassMsgPack {
     }
 
     public static function decode(string $value): mixed {
-        return @self::$msgpack->unpack($value, null);
+        return @self::$msgpack->unpack($value); // @phpstan-ignore-line: PHPstan claims second arg is required, it is not.
     }
 
     public static function init(): void {
diff --git a/src/RpcClient.php b/src/RpcClient.php
index 0bc5efd..6ce3160 100644
--- a/src/RpcClient.php
+++ b/src/RpcClient.php
@@ -6,6 +6,7 @@
 namespace Aiwass;
 
 use InvalidArgumentException;
+
 /**
  * Implemens an RPC client.
  */
diff --git a/tests/CurlHttpTest.php b/tests/CurlHttpTest.php
new file mode 100644
index 0000000..8997a6e
--- /dev/null
+++ b/tests/CurlHttpTest.php
@@ -0,0 +1,49 @@
+<?php
+// CurlHttpTest.php
+// Created: 2024-08-13
+// Updated: 2024-08-13
+
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+use Aiwass\CurlHttpRequest;
+
+#[CoversClass(CurlHttpRequest::class)]
+final class CurlHttpTest extends TestCase {
+    public function testGetRequest(): void {
+        $request = new CurlHttpRequest;
+        $request->setPost(false);
+        $request->setUrl('https://httpbin.org/get?alreadyhere=true');
+        $request->setHeader('X-Test', 'teste');
+        $request->setParams('soap=beans');
+        $response = json_decode($request->execute(), true);
+
+        $this->assertTrue(array_key_exists('X-Test', $response['headers']));
+        $this->assertEquals('teste', $response['headers']['X-Test']);
+
+        $this->assertTrue(array_key_exists('alreadyhere', $response['args']));
+        $this->assertEquals('true', $response['args']['alreadyhere']);
+
+        $this->assertTrue(array_key_exists('soap', $response['args']));
+        $this->assertEquals('beans', $response['args']['soap']);
+    }
+
+    public function testPostRequest(): void {
+        $request = new CurlHttpRequest;
+        $request->setPost(true);
+        $request->setUrl('https://httpbin.org/post');
+        $request->setHeader('X-Meow', 'soap');
+        $request->setParams('windows=xp&macos=leopard');
+        $response = json_decode($request->execute(), true);
+
+        $this->assertTrue(array_key_exists('X-Meow', $response['headers']));
+        $this->assertEquals('soap', $response['headers']['X-Meow']);
+
+        $this->assertTrue(array_key_exists('windows', $response['form']));
+        $this->assertEquals('xp', $response['form']['windows']);
+
+        $this->assertTrue(array_key_exists('macos', $response['form']));
+        $this->assertEquals('leopard', $response['form']['macos']);
+    }
+}
diff --git a/tests/HmacVerificationTest.php b/tests/HmacVerificationTest.php
new file mode 100644
index 0000000..e1b1ef5
--- /dev/null
+++ b/tests/HmacVerificationTest.php
@@ -0,0 +1,27 @@
+<?php
+// HmacVerificationTest.php
+// Created: 2024-08-13
+// Updated: 2024-08-13
+
+declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\CoversClass;
+use Aiwass\HmacVerificationProvider;
+
+#[CoversClass(HmacVerificationProvider::class)]
+final class HmacVerificationTest extends TestCase {
+    public function testProcedureEnforce(): void {
+        $provider = new HmacVerificationProvider(fn() => 'meow');
+        $action = 'test';
+        $params = 'meow=cool&the=bean';
+
+        $queryToken = $provider->sign(false, $action, $params);
+        $this->assertTrue($provider->verify($queryToken, false, $action, $params));
+        $this->assertFalse($provider->verify($queryToken, true, $action, $params));
+
+        $procedureToken = $provider->sign(true, $action, $params);
+        $this->assertTrue($provider->verify($procedureToken, true, $action, $params));
+        $this->assertFalse($provider->verify($procedureToken, false, $action, $params));
+    }
+}