diff --git a/test/qtism/runtime/tests/AssessmentItemSessionTest.php b/test/qtism/runtime/tests/AssessmentItemSessionTest.php
index 066f98a58..9e16fd06e 100644
--- a/test/qtism/runtime/tests/AssessmentItemSessionTest.php
+++ b/test/qtism/runtime/tests/AssessmentItemSessionTest.php
@@ -19,6 +19,7 @@
 use qtism\runtime\tests\AssessmentItemSession;
 use qtism\runtime\tests\AssessmentItemSessionException;
 use qtism\data\storage\xml\marshalling\ExtendedAssessmentItemRefMarshaller;
+use qtism\runtime\common\MultipleContainer;
 
 class AssessmentItemSessionTest extends QtiSmAssessmentItemTestCase {
 	
@@ -387,4 +388,32 @@ public function testRunCallback() {
         $itemSession->interact();
         $itemSession->endAttempt();
     }
+    
+    public function testSetOutcomeValuesWithSum() {
+        $doc = new XmlDocument();
+        $doc->load(self::samplesDir() . 'custom/items/set_outcome_values_with_sum.xml');
+        
+        $itemSession = new AssessmentItemSession($doc->getDocumentComponent(), new SessionManager());
+        $itemSession->beginItemSession();
+        $itemSession->beginAttempt();
+        
+        $responses = new State(array(new ResponseVariable('response-X', Cardinality::MULTIPLE, BaseType::IDENTIFIER, new MultipleContainer(BaseType::IDENTIFIER, array(new QtiIdentifier('ChoiceB'), new QtiIdentifier('ChoiceC'))))));
+        $itemSession->endAttempt($responses);
+        
+        $this->assertEquals(1., $itemSession['score-X']->getValue());
+    }
+    
+    public function testSetOutcomeValuesWithSumJuggling() {
+        $doc = new XmlDocument();
+        $doc->load(self::samplesDir() . 'custom/items/set_outcome_values_with_sum_juggling.xml');
+        
+        $itemSession = new AssessmentItemSession($doc->getDocumentComponent(), new SessionManager());
+        $itemSession->beginItemSession();
+        $itemSession->beginAttempt();
+        
+        $responses = new State(array(new ResponseVariable('response-X', Cardinality::MULTIPLE, BaseType::IDENTIFIER, new MultipleContainer(BaseType::IDENTIFIER, array(new QtiIdentifier('ChoiceB'), new QtiIdentifier('ChoiceC'))))));
+        $itemSession->endAttempt($responses);
+        
+        $this->assertEquals(1., $itemSession['score-X']->getValue());
+    }
 }
diff --git a/test/samples/custom/items/set_outcome_values_with_sum.xml b/test/samples/custom/items/set_outcome_values_with_sum.xml
new file mode 100644
index 000000000..e8dd18ed5
--- /dev/null
+++ b/test/samples/custom/items/set_outcome_values_with_sum.xml
@@ -0,0 +1,89 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assessmentItem title="Set Outcome Values with Sum" identifier="set_outcome_values_with_sum" timeDependent="false" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqti_v2p1 http://www.imsglobal.org/xsd/qti/qtiv2p1/imsqti_v2p1p1.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.imsglobal.org/xsd/imsqti_v2p1">
+  <responseDeclaration baseType="identifier" cardinality="multiple" identifier="response-X">
+    <correctResponse>
+      <value>ChoiceB</value>
+      <value>ChoiceC</value>
+    </correctResponse>
+  </responseDeclaration>
+  <outcomeDeclaration cardinality="single" baseType="float" identifier="SCORE">
+    <defaultValue>
+      <value>0</value>
+    </defaultValue>
+  </outcomeDeclaration>
+  <outcomeDeclaration cardinality="single" baseType="float" identifier="MAXSCORE">
+    <defaultValue>
+      <value>0</value>
+    </defaultValue>
+  </outcomeDeclaration>
+  <outcomeDeclaration baseType="float" cardinality="single" identifier="score-X">
+    <defaultValue>
+      <value>0</value>
+    </defaultValue>
+  </outcomeDeclaration>
+  <outcomeDeclaration baseType="float" cardinality="single" identifier="maxscore-X">
+    <defaultValue>
+      <value>1</value>
+    </defaultValue>
+  </outcomeDeclaration>
+  <itemBody>
+    <div>
+      <div>
+        <choiceInteraction id="interaction-1" minChoices="1" maxChoices="2" responseIdentifier="response-X" orientation="vertical">
+          <prompt>
+            <p>What is the correct response?</p>
+          </prompt>
+          <simpleChoice identifier="ChoiceA">
+            Choice A 
+        </simpleChoice>
+          <simpleChoice identifier="ChoiceB">
+            Choice B
+        </simpleChoice>
+          <simpleChoice identifier="ChoiceC">
+            Choice C
+        </simpleChoice>
+          <simpleChoice identifier="ChoiceD">
+            Choice D
+        </simpleChoice>
+        </choiceInteraction>
+      </div>
+    </div>
+  </itemBody>
+  <responseProcessing>
+    <responseCondition>
+      <responseIf>
+        <isNull>
+          <variable identifier="response-X" />
+        </isNull>
+        <setOutcomeValue identifier="score-X">
+          <baseValue baseType="integer">0</baseValue>
+        </setOutcomeValue>
+      </responseIf>
+      <responseElseIf>
+        <match>
+          <variable identifier="response-X" />
+          <correct identifier="response-X" />
+        </match>
+        <setOutcomeValue identifier="score-X">
+          <variable identifier="maxscore-X" />
+        </setOutcomeValue>
+      </responseElseIf>
+      <responseElse>
+        <setOutcomeValue identifier="score-X">
+          <baseValue baseType="integer">0</baseValue>
+        </setOutcomeValue>
+      </responseElse>
+    </responseCondition>
+    <setOutcomeValue identifier="SCORE">
+      <sum>
+        <variable identifier="score-X" />
+      </sum>
+    </setOutcomeValue>
+    <setOutcomeValue identifier="MAXSCORE">
+      <sum>
+        <variable identifier="maxscore-X" />
+      </sum>
+    </setOutcomeValue>
+  </responseProcessing>
+  <apipAccessibility xmlns="http://www.imsglobal.org/xsd/apip/apipv1p0/imsapip_qtiv1p0" />
+</assessmentItem>
diff --git a/test/samples/custom/items/set_outcome_values_with_sum_juggling.xml b/test/samples/custom/items/set_outcome_values_with_sum_juggling.xml
new file mode 100644
index 000000000..bcd5ed168
--- /dev/null
+++ b/test/samples/custom/items/set_outcome_values_with_sum_juggling.xml
@@ -0,0 +1,89 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assessmentItem title="Set Outcome Values with Sum Juggling" identifier="set_outcome_values_with_sum_juggling" timeDependent="false" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqti_v2p1 http://www.imsglobal.org/xsd/qti/qtiv2p1/imsqti_v2p1p1.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.imsglobal.org/xsd/imsqti_v2p1">
+  <responseDeclaration baseType="identifier" cardinality="multiple" identifier="response-X">
+    <correctResponse>
+      <value>ChoiceB</value>
+      <value>ChoiceC</value>
+    </correctResponse>
+  </responseDeclaration>
+  <outcomeDeclaration cardinality="single" baseType="float" identifier="SCORE">
+    <defaultValue>
+      <value>0</value>
+    </defaultValue>
+  </outcomeDeclaration>
+  <outcomeDeclaration cardinality="single" baseType="float" identifier="MAXSCORE">
+    <defaultValue>
+      <value>0</value>
+    </defaultValue>
+  </outcomeDeclaration>
+  <outcomeDeclaration baseType="float" cardinality="single" identifier="score-X">
+    <defaultValue>
+      <value>0</value>
+    </defaultValue>
+  </outcomeDeclaration>
+  <outcomeDeclaration baseType="float" cardinality="multiple" identifier="maxscore-X">
+    <defaultValue>
+      <value>1</value>
+    </defaultValue>
+  </outcomeDeclaration>
+  <itemBody>
+    <div>
+      <div>
+        <choiceInteraction id="interaction-1" minChoices="1" maxChoices="2" responseIdentifier="response-X" orientation="vertical">
+          <prompt>
+            <p>What is the correct response?</p>
+          </prompt>
+          <simpleChoice identifier="ChoiceA">
+            Choice A 
+        </simpleChoice>
+          <simpleChoice identifier="ChoiceB">
+            Choice B
+        </simpleChoice>
+          <simpleChoice identifier="ChoiceC">
+            Choice C
+        </simpleChoice>
+          <simpleChoice identifier="ChoiceD">
+            Choice D
+        </simpleChoice>
+        </choiceInteraction>
+      </div>
+    </div>
+  </itemBody>
+  <responseProcessing>
+    <responseCondition>
+      <responseIf>
+        <isNull>
+          <variable identifier="response-X" />
+        </isNull>
+        <setOutcomeValue identifier="score-X">
+          <baseValue baseType="integer">0</baseValue>
+        </setOutcomeValue>
+      </responseIf>
+      <responseElseIf>
+        <match>
+          <variable identifier="response-X" />
+          <correct identifier="response-X" />
+        </match>
+        <setOutcomeValue identifier="score-X">
+          <variable identifier="maxscore-X" />
+        </setOutcomeValue>
+      </responseElseIf>
+      <responseElse>
+        <setOutcomeValue identifier="score-X">
+          <baseValue baseType="integer">0</baseValue>
+        </setOutcomeValue>
+      </responseElse>
+    </responseCondition>
+    <setOutcomeValue identifier="SCORE">
+      <sum>
+        <variable identifier="score-X" />
+      </sum>
+    </setOutcomeValue>
+    <setOutcomeValue identifier="MAXSCORE">
+      <sum>
+        <variable identifier="maxscore-X" />
+      </sum>
+    </setOutcomeValue>
+  </responseProcessing>
+  <apipAccessibility xmlns="http://www.imsglobal.org/xsd/apip/apipv1p0/imsapip_qtiv1p0" />
+</assessmentItem>