diff --git a/src/Exceptions/GithubConfigException.php b/src/Exceptions/GithubConfigException.php
new file mode 100644
index 0000000..6545f9e
--- /dev/null
+++ b/src/Exceptions/GithubConfigException.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Salahhusa9\Updater\Exceptions;
+
+use Exception;
+
+class GithubConfigException extends Exception
+{
+    /**
+     * GithubConfigException constructor.
+     *
+     * @param  string  $message
+     */
+    public function __construct($message)
+    {
+        parent::__construct($message);
+    }
+}
diff --git a/src/RepositorySource/GithubRepository.php b/src/RepositorySource/GithubRepository.php
index dcdef9c..64a8e46 100644
--- a/src/RepositorySource/GithubRepository.php
+++ b/src/RepositorySource/GithubRepository.php
@@ -4,6 +4,7 @@
 
 use Illuminate\Support\Facades\Http;
 use Salahhusa9\Updater\Contracts\Repository;
+use Salahhusa9\Updater\Exceptions\GithubConfigException;
 
 class GithubRepository implements Repository
 {
@@ -80,18 +81,20 @@ public function getVersionsData(): \Illuminate\Support\Collection
      *
      * @return void
      */
-    private function checkConfig()
+    public function checkConfig()
     {
         if (config('updater.github_token') == null) {
-            throw new \Exception('Please set GITHUB_TOKEN in .env file');
+            throw new GithubConfigException('Please set GITHUB_TOKEN in .env file');
         }
 
         if (config('updater.github_username') == null) {
-            throw new \Exception('Please set GITHUB_USERNAME in .env file');
+            throw new GithubConfigException('Please set GITHUB_USERNAME in .env file');
         }
 
         if (config('updater.github_repository') == null) {
-            throw new \Exception('Please set GITHUB_REPOSITORY in .env file');
+            throw new GithubConfigException('Please set GITHUB_REPOSITORY in .env file');
         }
+
+        return true;
     }
 }
diff --git a/tests/RepositorySource/GithubRepositoryTest.php b/tests/RepositorySource/GithubRepositoryTest.php
new file mode 100644
index 0000000..8ba2a3b
--- /dev/null
+++ b/tests/RepositorySource/GithubRepositoryTest.php
@@ -0,0 +1,119 @@
+<?php
+
+namespace Salahhusa9\Updater\Tests\RepositorySource;
+
+use Illuminate\Support\Facades\Http;
+use Salahhusa9\Updater\Exceptions\GithubConfigException;
+use Salahhusa9\Updater\RepositorySource\GithubRepository;
+
+class GithubRepositoryTest extends \Salahhusa9\Updater\Tests\TestCase
+{
+    /** @test */
+    public function config_check()
+    {
+        // set env
+        config()->set('updater.github_token', 'salahhusa9');
+        config()->set('updater.github_username', 'salahhusa9');
+        config()->set('updater.github_repository', 'laravel-updater');
+
+        $githubRepository = new GithubRepository();
+
+        $this->assertTrue($githubRepository->checkConfig());
+    }
+
+    /** @test */
+    public function config_check_exception()
+    {
+        $this->expectException(GithubConfigException::class);
+
+        $githubRepository = new GithubRepository();
+
+        $this->assertTrue($githubRepository->checkConfig());
+    }
+
+    /** @test */
+    public function it_can_get_latest_version()
+    {
+        // set env
+        config()->set('updater.github_token', 'salahhusa9');
+        config()->set('updater.github_username', 'salahhusa9');
+        config()->set('updater.github_repository', 'laravel-updater');
+
+        Http::fake([
+            'https://api.github.com/repos/salahhusa9/laravel-updater/releases/latest' => Http::response([
+                'tag_name' => 'v1.0.0',
+            ], 200),
+        ]);
+
+        $githubRepository = new GithubRepository();
+
+        $this->assertEquals('v1.0.0', $githubRepository->getLatestVersion());
+    }
+
+    /** @test */
+    public function it_can_get_latest_version_data()
+    {
+        // set env
+        config()->set('updater.github_token', 'salahhusa9');
+        config()->set('updater.github_username', 'salahhusa9');
+        config()->set('updater.github_repository', 'laravel-updater');
+
+        Http::fake([
+            'https://api.github.com/repos/salahhusa9/laravel-updater/releases/latest' => Http::response([
+                'tag_name' => 'v1.0.0',
+            ], 200),
+        ]);
+
+        $githubRepository = new GithubRepository();
+
+        $this->assertIsArray($githubRepository->getLatestVersionData()->toArray());
+    }
+
+    /** @test */
+    public function it_can_get_versions()
+    {
+        // set env
+        config()->set('updater.github_token', 'salahhusa9');
+        config()->set('updater.github_username', 'salahhusa9');
+        config()->set('updater.github_repository', 'laravel-updater');
+
+        Http::fake([
+            'https://api.github.com/repos/salahhusa9/laravel-updater/releases' => Http::response([
+                [
+                    'tag_name' => 'v1.0.0',
+                ],
+                [
+                    'tag_name' => 'v1.0.1',
+                ],
+            ], 200),
+        ]);
+
+        $githubRepository = new GithubRepository();
+
+        $this->assertIsArray($githubRepository->getVersions());
+    }
+
+    /** @test */
+    public function it_can_get_versions_data()
+    {
+        // set env
+        config()->set('updater.github_token', 'salahhusa9');
+        config()->set('updater.github_username', 'salahhusa9');
+        config()->set('updater.github_repository', 'laravel-updater');
+
+        Http::fake([
+            'https://api.github.com/repos/salahhusa9/laravel-updater/releases' => Http::response([
+                [
+                    'tag_name' => 'v1.0.0',
+                ],
+                [
+                    'tag_name' => 'v1.0.1',
+                ],
+            ], 200),
+        ]);
+
+        $githubRepository = new GithubRepository();
+
+        $this->assertIsArray($githubRepository->getVersionsData()->toArray());
+    }
+}