diff --git a/README.md b/README.md
index eca4e0c..1d6e8d1 100644
--- a/README.md
+++ b/README.md
@@ -238,6 +238,14 @@ To run the test suite, go to the project root and run:
 $ php vendor/bin/phpunit
 ```
 
+The test suite also contains a number of functional integration tests that rely
+on a stable internet connection.
+If you do not want to run these, they can simply be skipped like this:
+
+```bash
+$ php vendor/bin/phpunit --exclude-group internet
+```
+
 ## License
 
 MIT
diff --git a/tests/FunctionalTest.php b/tests/FunctionalTest.php
index 94cdb9b..1b0b16f 100644
--- a/tests/FunctionalTest.php
+++ b/tests/FunctionalTest.php
@@ -1,11 +1,14 @@
 <?php
 
+use Clue\React\Block;
 use Clue\React\Soap\Factory;
 use Clue\React\Soap\Client;
 use Clue\React\Soap\Proxy;
-use Clue\React\Block;
 use PHPUnit\Framework\TestCase;
 
+/**
+ * @group internet
+ */
 class FunctionalTest extends TestCase
 {
     /**