diff --git a/.gitignore b/.gitignore
index d1502b0..3d7e132 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 vendor/
 composer.lock
+.phpunit.result.cache
diff --git a/README.md b/README.md
index 0d78b60..6040c59 100644
--- a/README.md
+++ b/README.md
@@ -77,4 +77,4 @@ Reference: [erusev/parsedown](https://github.com/erusev/parsedown/wiki/Tutorial:
 
 ## License
 
-MIT
\ No newline at end of file
+MIT
diff --git a/composer.json b/composer.json
index dea0f19..6d26360 100644
--- a/composer.json
+++ b/composer.json
@@ -13,9 +13,12 @@
         }
     ],
     "require": {
-        "illuminate/support": "^5.1",
+        "illuminate/support": "5.1 - 6.0",
         "erusev/parsedown": "~1.7"
     },
+    "require-dev": {
+        "orchestra/testbench": "3.9.x-dev@dev"
+    },
     "autoload": {
         "psr-4": {
             "Yansongda\\LaravelParsedown\\": "src"
@@ -24,6 +27,11 @@
             "src/helpers.php"
         ]
     },
+    "autoload-dev": {
+        "psr-4": {
+            "Yansongda\\LaravelParsedown\\Tests\\": "tests"
+        }
+    },
     "extra": {
         "laravel": {
             "providers": [
@@ -34,5 +42,7 @@
             }
         }
     },
-    "license": "MIT"
-}
\ No newline at end of file
+    "license": "MIT",
+    "minimum-stability": "dev",
+    "prefer-stable": true
+}
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..7741f18
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false"
+    backupStaticAttributes="false"
+    bootstrap="vendor/autoload.php"
+    colors="true"
+    convertErrorsToExceptions="true"
+    convertNoticesToExceptions="true"
+    convertWarningsToExceptions="true"
+    processIsolation="false"
+    stopOnFailure="false"
+>
+    <testsuites>
+        <testsuite name="Tests">
+            <directory suffix="Test.php">./tests</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">./app</directory>
+        </whitelist>
+    </filter>
+    <php>
+        <env name="APP_ENV" value="testing"/>
+        <env name="APP_KEY" value="base64:q+1Q2UvnkEsVI9JG5bSZMibWXtbspjdzcJKkj8woFVk="/>
+        <env name="APP_DEBUG" value="true"/>
+        <env name="APP_LOG_LEVEL" value="debug"/>
+        <env name="CACHE_DRIVER" value="array"/>
+        <env name="SESSION_DRIVER" value="file"/>
+        <env name="QUEUE_DRIVER" value="sync"/>
+    </php>
+</phpunit>
diff --git a/src/ParsedownServiceProvider.php b/src/ParsedownServiceProvider.php
index 64975fe..6b859f6 100644
--- a/src/ParsedownServiceProvider.php
+++ b/src/ParsedownServiceProvider.php
@@ -26,10 +26,15 @@ class ParsedownServiceProvider extends ServiceProvider
      */
     public function boot()
     {
-        if ($this->app instanceof LaravelApplication && $this->app->runningInConsole()) {
-            $this->publishes([
-                dirname(__DIR__).'/config/markdown.php' => config_path('markdown.php'),
-            ], 'laravel-parsedown-config');
+        if ($this->app instanceof LaravelApplication
+            && $this->app->runningInConsole()
+        ) {
+            $this->publishes(
+                [
+                    __DIR__.'/config/markdown.php' => config_path('markdown.php'),
+                ],
+                'laravel-parsedown-config'
+            );
         } elseif ($this->app instanceof LumenApplication) {
             $this->app->configure('markdown');
         }
@@ -48,11 +53,11 @@ public function register()
     {
         $this->mergeConfigFrom(dirname(__DIR__).'/config/markdown.php', 'markdown');
 
-        $this->app->singleton(Parsedown::class, function ($app) {
+        $this->app->singleton(Parsedown::class, function () {
             return Parsedown::instance()->setSafeMode(config('markdown.parsedown.safeMode'))
-                                        ->setBreaksEnabled(config('markdown.parsedown.breaksEnabled'))
-                                        ->setMarkupEscaped(config('markdown.parsedown.markupEscaped'))
-                                        ->setUrlsLinked(config('markdown.parsedown.urlsLinked'));
+                ->setBreaksEnabled(config('markdown.parsedown.breaksEnabled'))
+                ->setMarkupEscaped(config('markdown.parsedown.markupEscaped'))
+                ->setUrlsLinked(config('markdown.parsedown.urlsLinked'));
         });
 
         $this->app->alias(Parsedown::class, 'parsedown');
diff --git a/tests/Facades/ParsedownTest.php b/tests/Facades/ParsedownTest.php
new file mode 100644
index 0000000..48d866c
--- /dev/null
+++ b/tests/Facades/ParsedownTest.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace Yansongda\LaravelParsedown\Tests\Facades;
+
+use Yansongda\LaravelParsedown\Facades\Parsedown;
+use Yansongda\LaravelParsedown\Tests\TestCase;
+
+class ParsedownTest extends TestCase
+{
+    public function testHelperWorks()
+    {
+        $result = parsedown('# Heading 1');
+
+        $this->assertEquals('<h1>Heading 1</h1>', $result);
+    }
+
+    public function testFacadeWorks()
+    {
+        $result = Parsedown::text('# Heading 1');
+
+        $this->assertEquals('<h1>Heading 1</h1>', $result);
+    }
+
+    public function testSingletonWorks()
+    {
+        $result = app('parsedown')->text('# Heading 1');
+
+        $this->assertEquals('<h1>Heading 1</h1>', $result);
+    }
+}
diff --git a/tests/TestCase.php b/tests/TestCase.php
new file mode 100644
index 0000000..4b0d4c3
--- /dev/null
+++ b/tests/TestCase.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Yansongda\LaravelParsedown\Tests;
+
+use Orchestra\Testbench\TestCase as OrchestraTestCase;
+use Yansongda\LaravelParsedown\ParsedownServiceProvider;
+
+abstract class TestCase extends OrchestraTestCase
+{
+    protected function getPackageProviders($app)
+    {
+        return [
+            ParsedownServiceProvider::class,
+        ];
+    }
+}