diff --git a/tests/EnvValidatorFactory.php b/tests/EnvValidatorFactory.php
index d359a42..a38b4f1 100644
--- a/tests/EnvValidatorFactory.php
+++ b/tests/EnvValidatorFactory.php
@@ -14,7 +14,13 @@ public static function buildFromTestConfig(array $override = [])
     {
         $testConfig = require __DIR__ . '/config/laravel-env-validator.php';
         $config     = array_merge($testConfig, $override);
-        $validator  = \Validator::make($_SERVER, $config);
+
+        $env = [];
+        foreach (array_keys($config) as $variable) {
+            $env[$variable] = env($variable);
+        }
+
+        $validator  = \Validator::make($env, $config);
 
         return static::buildFromValidator($validator);
     }
diff --git a/tests/EnvValidatorTest.php b/tests/EnvValidatorTest.php
index 5b8dadc..9337da9 100644
--- a/tests/EnvValidatorTest.php
+++ b/tests/EnvValidatorTest.php
@@ -18,8 +18,9 @@ class EnvValidatorTest extends TestCase
     public function it_has_the_right_error_message()
     {
         try {
-            unset($_SERVER['VAR_1']);
-            unset($_SERVER['VAR_2']);
+            // unset variables
+            putenv('VAR_1');
+            putenv('VAR_2');
 
             $envValidator = EnvValidatorFactory::buildFromTestConfig([
                 'VAR_1' => 'required',
@@ -42,8 +43,8 @@ public function it_has_the_right_error_message()
     public function it_does_not_throw_exception_if_validation_is_met()
     {
         try {
-            $_SERVER['VAR_1'] = '123';
-            $_SERVER['VAR_2'] = 'A';
+            putenv('VAR_1=123');
+            putenv('VAR_2=A');
 
             $envValidator = EnvValidatorFactory::buildFromTestConfig([
                 'VAR_1' => 'required',