diff --git a/tests/functional/portal_announcement_test.php b/tests/functional/portal_announcement_test.php
index bde49813..b11eba6a 100644
--- a/tests/functional/portal_announcement_test.php
+++ b/tests/functional/portal_announcement_test.php
@@ -15,6 +15,7 @@ class phpbb_functional_portal_announcement_test extends \board3\portal\tests\tes
 	public function setUp()
 	{
 		parent::setUp();
+		$this->purge_cache();
 
 		$this->login();
 		$this->admin_login();
@@ -59,6 +60,11 @@ class phpbb_functional_portal_announcement_test extends \board3\portal\tests\tes
 
 	public function test_shortened_message()
 	{
+		if (!class_exists('\Nickvergessen\TrimMessage\TrimMessage'))
+		{
+			$this->markTestSkipped('Unable to test shortening message without TrimMessage tool');
+		}
+
 		// Create topic as announcement
 		$data = $this->create_topic(2, 'Portal-announce-global', str_repeat('This is a global announcement for the portal', 6), array(
 			'topic_type'	=> POST_GLOBAL,
diff --git a/tests/functional/portal_birthday_list_test.php b/tests/functional/portal_birthday_list_test.php
index cb438c89..a117d303 100644
--- a/tests/functional/portal_birthday_list_test.php
+++ b/tests/functional/portal_birthday_list_test.php
@@ -16,6 +16,8 @@ class phpbb_functional_portal_birthday_list_test extends \board3\portal\tests\te
 	{
 		parent::setUp();
 
+		$this->purge_cache();
+
 		$this->login();
 		$this->admin_login();
 	}
diff --git a/tests/functional/portal_no_error_test.php b/tests/functional/portal_no_error_test.php
index d226a395..617eaf30 100644
--- a/tests/functional/portal_no_error_test.php
+++ b/tests/functional/portal_no_error_test.php
@@ -16,6 +16,8 @@ class phpbb_functional_portal_no_error_test extends \board3\portal\tests\testfra
 	{
 		parent::setUp();
 
+		$this->purge_cache();
+
 		$this->login();
 		$this->admin_login();
 	}