diff --git a/README.md b/README.md
index 01619f5..2c49fad 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,14 @@ $mock = EasyMock::mock('My\Class', array(
 ));
 ```
 
+You can also have methods throw exceptions by providing an `Exception` instance:
+
+```php
+$mock = EasyMock::mock('My\Class', array(
+    'sayHello' => new \RuntimeException('Whoops'),
+));
+```
+
 ### What if?
 
 If you want to use assertions or other PHPUnit features, just do it:
diff --git a/src/EasyMock.php b/src/EasyMock.php
index bfeeee7..3a40bd8 100644
--- a/src/EasyMock.php
+++ b/src/EasyMock.php
@@ -51,6 +51,8 @@ private static function mockMethod(PHPUnit_Framework_MockObject_MockObject $mock
 
         if (is_callable($return)) {
             $methodAssertion->willReturnCallback($return);
+        } elseif ($return instanceof \Exception) {
+            $methodAssertion->willThrowException($return);
         } else {
             $methodAssertion->willReturn($return);
         }
diff --git a/tests/Fixture/CustomException.php b/tests/Fixture/CustomException.php
new file mode 100644
index 0000000..62b65b7
--- /dev/null
+++ b/tests/Fixture/CustomException.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace EasyMock\Test\Fixture;
+
+class CustomException extends \Exception
+{
+}
diff --git a/tests/MockClassTest.php b/tests/MockClassTest.php
index d052481..43c524e 100644
--- a/tests/MockClassTest.php
+++ b/tests/MockClassTest.php
@@ -4,6 +4,8 @@
 
 use EasyMock\EasyMock;
 use EasyMock\Test\Fixture\ClassFixture;
+use EasyMock\Test\Fixture\CustomException;
+use EasyMock\Test\Fixture\InterfaceFixture;
 
 /**
  * @author Matthieu Napoli <matthieu@mnapoli.fr>
@@ -15,6 +17,7 @@ class MockClassTest extends \PHPUnit_Framework_TestCase
      */
     public function should_mock_objects()
     {
+        /** @var ClassFixture $mock */
         $mock = EasyMock::mock('EasyMock\Test\Fixture\ClassFixture');
 
         $this->assertInstanceOf('PHPUnit_Framework_MockObject_MockObject', $mock);
@@ -26,12 +29,24 @@ public function should_mock_objects()
      */
     public function should_mock_interfaces()
     {
+        /** @var InterfaceFixture $mock */
         $mock = EasyMock::mock('EasyMock\Test\Fixture\InterfaceFixture');
 
         $this->assertInstanceOf('PHPUnit_Framework_MockObject_MockObject', $mock);
         $this->assertNull($mock->foo());
     }
 
+    /**
+     * @test
+     */
+    public function not_mocked_methods_should_return_null()
+    {
+        /** @var ClassFixture $mock */
+        $mock = EasyMock::mock('EasyMock\Test\Fixture\ClassFixture');
+
+        $this->assertNull($mock->foo());
+    }
+
     /**
      * @test
      */
@@ -62,12 +77,15 @@ public function should_mock_existing_method_with_a_callback()
 
     /**
      * @test
+     * @expectedException \EasyMock\Test\Fixture\CustomException
+     * @expectedExceptionMessage My message
      */
-    public function not_mocked_methods_should_return_null()
+    public function should_mock_existing_method_to_throw_exception()
     {
         /** @var ClassFixture $mock */
-        $mock = EasyMock::mock('EasyMock\Test\Fixture\ClassFixture');
-
-        $this->assertSame(null, $mock->foo());
+        $mock = EasyMock::mock('EasyMock\Test\Fixture\ClassFixture', array(
+            'foo' => new CustomException('My message'),
+        ));
+        $mock->foo();
     }
 }