diff --git a/composer.json b/composer.json
index 8fc208e..8c7b61e 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
         "php": "^7.1.3",
         "ext-json": "*",
         "psr/log": "^1.0",
-        "symfony/http-client": "^4.3",
+        "symfony/http-client": "^4.3"
     },
     "require-dev": {
         "symfony/form": "^2.1|^3.0|^4.0",
diff --git a/src/SymfonyCorp/Connect/Api/Api.php b/src/SymfonyCorp/Connect/Api/Api.php
index 57f6132..d23741a 100644
--- a/src/SymfonyCorp/Connect/Api/Api.php
+++ b/src/SymfonyCorp/Connect/Api/Api.php
@@ -12,12 +12,12 @@
 namespace SymfonyCorp\Connect\Api;
 
 use Buzz\Browser;
+use Psr\Log\LoggerInterface;
+use Psr\Log\NullLogger;
 use Symfony\Component\HttpClient\HttpClient;
 use Symfony\Contracts\HttpClient\Exception\ClientExceptionInterface;
 use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
-use Psr\Log\LoggerInterface;
-use Psr\Log\NullLogger;
 use Symfony\Contracts\HttpClient\ResponseInterface;
 use SymfonyCorp\Connect\Api\Parser\ParserInterface;
 use SymfonyCorp\Connect\Api\Parser\VndComSymfonyConnectXmlParser as Parser;
@@ -40,13 +40,16 @@ class Api
     private $endpoint;
     private $accessToken;
 
+    /**
+     * @param HttpClientInterface|null $httpClient
+     */
     public function __construct($endpoint = null, $httpClient = null, ParserInterface $parser = null, LoggerInterface $logger = null)
     {
         if ($httpClient instanceof Browser) {
             @trigger_error(sprintf('Passing a "%s" to "%s()" is deprecated since symfonycorp/connect 5.1, use "%s" instead.', Browser::class, __METHOD__, HttpClientInterface::class), E_USER_DEPRECATED);
             $httpClient = null;
-        } elseif ($httpClient && !$httpClient instanceof HttpClientInterface) {
-            throw new \InvalidArgumentException(sprintf('Argument 2 passed to %s() must be an instance of %s or null, %s given', __METHOD__, HttpClientInterface::class, is_object($httpClient) ? get_class($httpClient) : gettype($httpClient)));
+        } elseif (null !== $httpClient && !$httpClient instanceof HttpClientInterface) {
+            throw new \TypeError(sprintf('Argument 2 passed to %s() must be an instance of %s or null, %s given', __METHOD__, HttpClientInterface::class, \is_object($httpClient) ? \get_class($httpClient) : \gettype($httpClient)));
         }
 
         $this->httpClient = $httpClient ?: HttpClient::create();
diff --git a/src/SymfonyCorp/Connect/OAuthConsumer.php b/src/SymfonyCorp/Connect/OAuthConsumer.php
index 48c636b..e8197d2 100644
--- a/src/SymfonyCorp/Connect/OAuthConsumer.php
+++ b/src/SymfonyCorp/Connect/OAuthConsumer.php
@@ -13,8 +13,8 @@
 
 use Buzz\Browser;
 use Buzz\Client\Curl;
-use Psr\Log\NullLogger;
 use Psr\Log\LoggerInterface;
+use Psr\Log\NullLogger;
 use Symfony\Component\HttpClient\HttpClient;
 use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
@@ -42,13 +42,16 @@ class OAuthConsumer
         'authorize' => '/oauth/authorize',
     ];
 
+    /**
+     * @param HttpClientInterface|null $httpClient
+     */
     public function __construct($appId, $appSecret, $scope, $endpoint = null, $httpClient = null, LoggerInterface $logger = null)
     {
         if ($httpClient instanceof Browser) {
             @trigger_error(sprintf('Passing a "%s" to "%s()" is deprecated since symfonycorp/connect 5.1, use "%s" instead.', Browser::class, __METHOD__, HttpClientInterface::class), E_USER_DEPRECATED);
             $httpClient = null;
-        } elseif ($httpClient && !$httpClient instanceof HttpClientInterface) {
-            throw new \InvalidArgumentException(sprintf('Argument 5 passed to %s() must be an instance of %s or null, %s given', __METHOD__, HttpClientInterface::class, is_object($httpClient) ? get_class($httpClient) : gettype($httpClient)));
+        } elseif (null !== $httpClient && !$httpClient instanceof HttpClientInterface) {
+            throw new \TypeError(sprintf('Argument 5 passed to %s() must be an instance of %s or null, %s given', __METHOD__, HttpClientInterface::class, \is_object($httpClient) ? \get_class($httpClient) : \gettype($httpClient)));
         }
 
         $this->httpClient = $httpClient ?: HttpClient::create();
@@ -164,9 +167,12 @@ public function getEndpoint()
         return $this->endpoint;
     }
 
+    /**
+     * @deprecated since symfonycorp/connect 5.1
+     */
     public function getBrowser()
     {
-        @trigger_error(sprintf('"%s()" has been deprecated since symfonycorp/connect 5.1.', __METHOD__), E_USER_DEPRECATED);
+        @trigger_error(sprintf('"%s()" is deprecated since symfonycorp/connect 5.1.', __METHOD__), E_USER_DEPRECATED);
 
         if (!class_exists(Browser::class)) {
             throw new \LogicException(sprintf('You cannot use "%s()" as the "kriswallsmith/buzz" package is not installed, try running "composer require kriswallsmith/buzz".', Browser::class));
diff --git a/tests/SymfonyCorp/Connect/Tests/Api/ApiTest.php b/tests/SymfonyCorp/Connect/Tests/Api/ApiTest.php
index 614a3cf..cf792b8 100644
--- a/tests/SymfonyCorp/Connect/Tests/Api/ApiTest.php
+++ b/tests/SymfonyCorp/Connect/Tests/Api/ApiTest.php
@@ -11,12 +11,12 @@
 
 namespace SymfonyCorp\Connect\Test\Api;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpClient\MockHttpClient;
 use Symfony\Component\HttpClient\Response\MockResponse;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 use SymfonyCorp\Connect\Api\Api;
 use SymfonyCorp\Connect\Api\Entity\Root;
-use PHPUnit\Framework\TestCase;
 
 /**
  * ApitTest.