diff --git a/src/Stringy/Stringy.php b/src/Stringy/Stringy.php
index 9cf13b5..7d0ed56 100644
--- a/src/Stringy/Stringy.php
+++ b/src/Stringy/Stringy.php
@@ -359,7 +359,7 @@ class Stringy
     public function pad($length, $padStr = ' ', $padType = 'right')
     {
         if (!in_array($padType, array('left', 'right', 'both'))) {
-            throw new InvalidArgumentException('Pad expects $padType ' .
+            throw new \InvalidArgumentException('Pad expects $padType ' .
                 "to be one of 'left', 'right' or 'both'");
         }
 
diff --git a/tests/Stringy/StaticStringyTest.php b/tests/Stringy/StaticStringyTest.php
index ca17595..57863fb 100644
--- a/tests/Stringy/StaticStringyTest.php
+++ b/tests/Stringy/StaticStringyTest.php
@@ -139,6 +139,14 @@ class StaticStringyTestCase extends CommonTest
         $this->assertEquals($expected, $result);
     }
 
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testPadException()
+    {
+        $result = S::pad('string', 5, 'foo', 'bar');
+    }
+
     /**
      * @dataProvider stringsForPadLeft
      */
diff --git a/tests/Stringy/StringyTest.php b/tests/Stringy/StringyTest.php
index 0397dfc..deb2285 100644
--- a/tests/Stringy/StringyTest.php
+++ b/tests/Stringy/StringyTest.php
@@ -187,6 +187,15 @@ class StringyTestCase extends CommonTest
         $this->assertEquals($str, $stringy);
     }
 
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testPadException()
+    {
+        $stringy = S::create('foo');
+        $result = $stringy->pad(5, 'foo', 'bar');
+    }
+
     /**
      * @dataProvider stringsForPadLeft
      */