diff --git a/.Jenkinsfile b/.Jenkinsfile
new file mode 100644
index 0000000..ef792c6
--- /dev/null
+++ b/.Jenkinsfile
@@ -0,0 +1,33 @@
+pipeline {
+    agent {
+        label 'master'
+    }
+    stages {
+        stage('Tests') {
+            agent {
+                docker {
+                    image 'alexwijn/docker-git-php-composer'
+                    reuseNode true
+                }
+            }
+            environment {
+                HOME = '.'
+            }
+            options {
+                skipDefaultCheckout()
+            }
+            steps {
+                withCredentials([string(credentialsId: 'jenkins_github_token', variable: 'GIT_TOKEN')]) {
+                    sh(
+                        label: 'Install/Update sources from Composer',
+                        script: "COMPOSER_AUTH='{\"github-oauth\": {\"github.com\": \"$GIT_TOKEN\"}}\' composer update --no-interaction --no-ansi --no-progress"
+                    )
+                }
+                sh(
+                    label: 'Run backend tests',
+                    script: './vendor/bin/phpunit'
+                )
+            }
+        }
+    }
+}
diff --git a/README.md b/README.md
index bac185a..d579922 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ You can then find below usage tutorials, presented by topics.
 
 ### Messages
 
-- how to [implement the proctoring workflow (for platform and / or tool)](doc/message/proctoring-workflow.md)
+- how to [implement the proctoring messages workflow (for platform and / or tool)](doc/message/proctoring-workflow.md)
 
 ### Services
 
diff --git a/doc/service/tool.md b/doc/service/tool.md
index 67adc5d..347fc53 100644
--- a/doc/service/tool.md
+++ b/doc/service/tool.md
@@ -42,12 +42,13 @@ $control = new AcsControl(...);
 
 /** @var AcsControlResultInterface $controlResult */
 $controlResult = $acsClient->sendControlForPayload(
-    $registration, // [required] as the tool, it will call the platform of this registration
-    $payload,      // [required] from the LTI message payload containing the ACS claim (got at LTI launch)
-    $control       // [required] with provided ACS control
+    $registration,  // [required] as the tool, it will call the platform of this registration
+    $control,       // [required] with provided ACS control
+    $payload        // [required] from the LTI message payload containing the ACS claim (got at LTI launch)
+
 );
 
-// or you also can call directly for an given URL (avoid claim construction)
+// or you also can call directly for an given URL (avoid payload construction)
 /** @var AcsControlResultInterface $controlResult */
 $controlResult = $acsClient->sendControl(
     $registration,              // [required] as the tool, it will call the platform of this registration
diff --git a/src/Service/Client/AcsServiceClient.php b/src/Service/Client/AcsServiceClient.php
index 392175d..92ddef6 100644
--- a/src/Service/Client/AcsServiceClient.php
+++ b/src/Service/Client/AcsServiceClient.php
@@ -67,8 +67,8 @@ public function __construct(
      */
     public function sendControlForPayload(
         RegistrationInterface $registration,
-        LtiMessagePayloadInterface $payload,
-        AcsControlInterface $control
+        AcsControlInterface $control,
+        LtiMessagePayloadInterface $payload
     ): AcsControlResultInterface {
         try {
             $acsClaim = $payload->getAcs();
diff --git a/tests/Integration/Service/Client/AcsServiceClientTest.php b/tests/Integration/Service/Client/AcsServiceClientTest.php
index 46334c9..6a7e6db 100644
--- a/tests/Integration/Service/Client/AcsServiceClientTest.php
+++ b/tests/Integration/Service/Client/AcsServiceClientTest.php
@@ -246,7 +246,7 @@ public function testSendControlForPayloadSuccess(): void
             ->method('getAcs')
             ->willReturn($acsClaim);
 
-        $result = $this->subject->sendControlForPayload($registration, $payloadMock, $control);
+        $result = $this->subject->sendControlForPayload($registration, $control, $payloadMock);
 
         $this->assertInstanceOf(AcsControlResultInterface::class, $result);
         $this->assertEquals($controlResult, $result);
@@ -271,8 +271,8 @@ public function testSendControlForPayloadFailureOnMissingAcsClaim(): void
 
         $this->subject->sendControlForPayload(
             $registration,
-            $payloadMock,
-            $this->createMock(AcsControlInterface::class)
+            $this->createMock(AcsControlInterface::class),
+            $payloadMock
         );
     }
 
@@ -306,8 +306,8 @@ public function testSendControlForPayloadFailureOnInvalidAcsAction(): void
 
         $this->subject->sendControlForPayload(
             $registration,
-            $payloadMock,
-            $control
+            $control,
+            $payloadMock
         );
     }
 }