diff --git a/.travis.yml b/.travis.yml
index 20bf180..2ccaea0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,11 @@
+sudo: false
 language: php
 
 php:
   - 5.4
   - 5.5
   - 5.6
+  - 7.0
   - hhvm
 
 install:
@@ -12,3 +14,8 @@ install:
 
 script:
   - ./vendor/bin/phpunit -c ./phpunit.xml --coverage-text --strict
+  - ./vendor/bin/phpcs --standard=PSR2 src
+  - ./vendor/bin/phpcs --standard=PSR2 tests
+
+matrix:
+  fast_finish: true
diff --git a/composer.json b/composer.json
index fbaf816..5080058 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,8 @@
         "php": ">=5.4.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.0"
+        "phpunit/phpunit": "~4.0",
+        "squizlabs/php_codesniffer": "2.*"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/AbstractEnum.php b/src/AbstractEnum.php
index 3829ca2..5272ce6 100644
--- a/src/AbstractEnum.php
+++ b/src/AbstractEnum.php
@@ -67,7 +67,7 @@ public static function exists($value)
      */
     public static function assertExists($value)
     {
-        if (static::exists($value) == false) {
+        if (static::exists($value) === false) {
             $class = substr(strrchr(get_called_class(), '\\'), 1);
             throw new \InvalidArgumentException(sprintf('"%s" is not a valid %s value.', $value, $class));
         }