diff --git a/tests/integration/Mailer/MailerTest.php b/tests/integration/Mailer/MailerTest.php
index 4cb7ff102d..a3ccb2189b 100644
--- a/tests/integration/Mailer/MailerTest.php
+++ b/tests/integration/Mailer/MailerTest.php
@@ -185,7 +185,7 @@ class MailerTest extends \MailPoetTest {
   }
 
   function testItCanSend() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $this->sender['address'] = 'staff@mailpoet.com';
     $mailer = new Mailer();
     $mailer->init($this->mailer, $this->sender, $this->reply_to);
diff --git a/tests/integration/Mailer/Methods/AmazonSESTest.php b/tests/integration/Mailer/Methods/AmazonSESTest.php
index e2a7e0ec75..f336cf8b25 100644
--- a/tests/integration/Mailer/Methods/AmazonSESTest.php
+++ b/tests/integration/Mailer/Methods/AmazonSESTest.php
@@ -215,7 +215,7 @@ class AmazonSESTest extends \MailPoetTest {
   }
 
   function testItCannotSendWithoutProperAccessKey() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $this->mailer->aws_access_key = 'somekey';
     $result = $this->mailer->send(
       $this->newsletter,
@@ -253,7 +253,7 @@ class AmazonSESTest extends \MailPoetTest {
   }
 
   function testItCanSend() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $result = $this->mailer->send(
       $this->newsletter,
       $this->subscriber
diff --git a/tests/integration/Mailer/Methods/MailPoetAPITest.php b/tests/integration/Mailer/Methods/MailPoetAPITest.php
index 912f9acf81..9e65b9e47c 100644
--- a/tests/integration/Mailer/Methods/MailPoetAPITest.php
+++ b/tests/integration/Mailer/Methods/MailPoetAPITest.php
@@ -126,7 +126,7 @@ class MailPoetAPITest extends \MailPoetTest {
   }
 
   function testItWillNotSendIfApiKeyIsMarkedInvalid() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $this->mailer->api_key = 'someapi';
     $this->mailer->services_checker = Stub::make(
       new ServicesChecker(),
@@ -141,7 +141,7 @@ class MailPoetAPITest extends \MailPoetTest {
   }
 
   function testItCannotSendWithoutProperApiKey() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $this->mailer->api->setKey('someapi');
     $result = $this->mailer->send(
       $this->newsletter,
@@ -151,7 +151,7 @@ class MailPoetAPITest extends \MailPoetTest {
   }
 
   function testItCanSend() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $result = $this->mailer->send(
       $this->newsletter,
       $this->subscriber
diff --git a/tests/integration/Mailer/Methods/PHPMailTest.php b/tests/integration/Mailer/Methods/PHPMailTest.php
index 03e0a7e86e..cc589b7d0a 100644
--- a/tests/integration/Mailer/Methods/PHPMailTest.php
+++ b/tests/integration/Mailer/Methods/PHPMailTest.php
@@ -145,7 +145,7 @@ class PHPMailTest extends \MailPoetTest {
   }
 
   function testItCanSend() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $result = $this->mailer->send(
       $this->newsletter,
       $this->subscriber
diff --git a/tests/integration/Mailer/Methods/SMTPTest.php b/tests/integration/Mailer/Methods/SMTPTest.php
index 1e1dbe8315..2ef89487a6 100644
--- a/tests/integration/Mailer/Methods/SMTPTest.php
+++ b/tests/integration/Mailer/Methods/SMTPTest.php
@@ -123,7 +123,7 @@ class SMTPTest extends \MailPoetTest {
   }
 
   function testItCantSendWithoutProperAuthentication() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $this->mailer->login = 'someone';
     $this->mailer->mailer = $this->mailer->buildMailer();
     $result = $this->mailer->send(
@@ -192,7 +192,7 @@ class SMTPTest extends \MailPoetTest {
   }
 
   function testItCanSend() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $result = $this->mailer->send(
       $this->newsletter,
       $this->subscriber
diff --git a/tests/integration/Mailer/Methods/SendGridTest.php b/tests/integration/Mailer/Methods/SendGridTest.php
index 7e66d1e6e7..3435892d68 100644
--- a/tests/integration/Mailer/Methods/SendGridTest.php
+++ b/tests/integration/Mailer/Methods/SendGridTest.php
@@ -76,7 +76,7 @@ class SendGridTest extends \MailPoetTest {
   }
 
   function testItCannotSendWithoutProperApiKey() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $this->mailer->api_key = 'someapi';
     $result = $this->mailer->send(
       $this->newsletter,
@@ -103,7 +103,7 @@ class SendGridTest extends \MailPoetTest {
   }
 
   function testItCanSend() {
-    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') return;
+    if (getenv('WP_TEST_MAILER_ENABLE_SENDING') !== 'true') $this->markTestSkipped();
     $result = $this->mailer->send(
       $this->newsletter,
       $this->subscriber