diff --git a/.travis.yml b/.travis.yml
index 85292bb..6d58410 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -37,4 +37,4 @@ before_script:
 
 script:
 - mv tests/acceptance.suite.dist.yml tests/acceptance.suite.yml
-- vendor/bin/robo run:tests true
+- vendor/bin/robo run:tests --use-htaccess
diff --git a/README.md b/README.md
index 023671f..183723c 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,20 @@ $ vendor/bin/robo
 $ vendor/bin/robo run:tests
 ```
 
+## Additional options
+
+You can run the tests against different resolutions. The default acceptance YAML configuration file provides three options:
+
+* "desktop": default, 1024x768px
+* "tablet": tablet in portrait mode, 768x1024px
+* "phone": phone in portrait mode, 480x640px
+
+To set a specific resolution, set is as an option of the command:
+
+`$ vendor/bin/robo run:tests --env=tablet`
+
+Note: the first parameter is used by Travis and you should always set it to "0" when you run your tests locally.
+
 ##For Windows:
 
 You need to install:
diff --git a/RoboFile.php b/RoboFile.php
index 7eeac57..4cc157e 100644
--- a/RoboFile.php
+++ b/RoboFile.php
@@ -66,13 +66,14 @@ class RoboFile extends \Robo\Tasks
 	/**
 	 * Executes all the Selenium System Tests in a suite on your machine
 	 *
-	 * @param   bool  $use_htaccess  Renames and enable embedded Joomla .htaccess file
-	 *
+	 * @param   array $opts Array of configuration options:
+	 *          - 'use-htaccess': renames and enable embedded Joomla .htaccess file
+	 *          - 'env': set a specific environment to get configuration from
 	 * @return mixed
 	 */
-	public function runTests($use_htaccess = false)
+	public function runTests($opts = ['use-htaccess' => false, 'env' => 'desktop'])
 	{
-		$this->createTestingSite($use_htaccess);
+		$this->createTestingSite($opts['use-htaccess']);
 
 		$this->getComposer();
 
@@ -87,6 +88,7 @@ class RoboFile extends \Robo\Tasks
 			->arg('--steps')
 			->arg('--debug')
 			->arg('--fail-fast')
+			->arg('--env ' . $opts['env'])
 			->arg('tests/acceptance/install/')
 			->run()
 			->stopOnFail();
@@ -95,6 +97,7 @@ class RoboFile extends \Robo\Tasks
 			->arg('--steps')
 			->arg('--debug')
 			->arg('--fail-fast')
+			->arg('--env ' . $opts['env'])
 			->arg('tests/acceptance/administrator/')
 			->run()
 			->stopOnFail();
@@ -103,9 +106,11 @@ class RoboFile extends \Robo\Tasks
 			->arg('--steps')
 			->arg('--debug')
 			->arg('--fail-fast')
+			->arg('--env ' . $opts['env'])
 			->arg('tests/acceptance/frontend/')
 			->run()
 			->stopOnFail();
+
 		/*
 		// Uncomment this lines if you need to debug selenium errors
 		$seleniumErrors = file_get_contents('selenium.log');
diff --git a/tests/acceptance.suite.dist.yml b/tests/acceptance.suite.dist.yml
index fb7b6a3..127d0db 100644
--- a/tests/acceptance.suite.dist.yml
+++ b/tests/acceptance.suite.dist.yml
@@ -38,4 +38,16 @@ modules:
         AcceptanceHelper:
             repo_folder: '/home/travis/build/joomla-extensions/weblinks/' # Path to the Extension repository. To be used by tests to install via Install from folder
             counter_test_url: 'http://localhost/tests/joomla-cms3' # the url for the weblink item used to test hits counter
-error_level: "E_ALL & ~E_STRICT & ~E_DEPRECATED"
\ No newline at end of file
+error_level: "E_ALL & ~E_STRICT & ~E_DEPRECATED"
+env:
+    desktop: ~
+    tablet:
+        modules:
+            config:
+                JoomlaBrowser:
+                    window_size: 768x1024
+    phone:
+        modules:
+            config:
+                JoomlaBrowser:
+                    window_size: 480x640
\ No newline at end of file