diff --git a/resources/skins.minerva.scripts/pageIssues.js b/resources/skins.minerva.scripts/pageIssues.js
index 8dbd142..9fb8c3f 100644
--- a/resources/skins.minerva.scripts/pageIssues.js
+++ b/resources/skins.minerva.scripts/pageIssues.js
@@ -41,23 +41,27 @@
 	 * In the case that a page-issue is part of a "multiple issues" template,
 	 * returns the maximum severity for that group of issues.
 	 *
-	 * @param {array} acc - the return array containing severities
-	 * @param {IssueSummary} summary current IssueSummary object
+	 * @param {array} formattedArr - the return array containing severities
+	 * @param {IssueSummary} currentItem current IssueSummary object
 	 * @param {number} currentIndex current index of pageIssues
 	 * @param {array} pageIssues array of pageIssues
 	 *
 	 * @return {array} acc
 	 */
-	function formatPageIssuesSeverity( acc, summary, currentIndex, pageIssues ) {
-		var lastItem = pageIssues[ currentIndex - 1 ];
-		if ( lastItem && lastItem.isMultiple && summary.isMultiple ) {
-			acc[ acc.length - 1 ] = pageIssuesParser.maxSeverity(
-				[ lastItem.severity, summary.severity ]
+	function formatPageIssuesSeverity( formattedArr, currentItem, currentIndex, pageIssues ) {
+		var lastItem = pageIssues[ currentIndex - 1 ],
+			lastFormattedIndex = formattedArr.length - 1,
+			lastFormattedValue = formattedArr[ lastFormattedIndex ];
+		// If the last and current item `isMultiple`, fold the maxSeverity
+		// of the two items into a single value.
+		if ( lastItem && lastItem.isMultiple && currentItem.isMultiple ) {
+			formattedArr[ lastFormattedIndex ] = pageIssuesParser.maxSeverity(
+				[ lastFormattedValue, currentItem.severity ]
 			);
 		} else {
-			acc.push( summary.severity );
+			formattedArr.push( currentItem.severity );
 		}
-		return acc;
+		return formattedArr;
 	}
 
 	/**
@@ -336,6 +340,7 @@
 		// the subscription call in cleanuptemplates.
 		log: pageIssuesLogger.log,
 		test: {
+			formatPageIssuesSeverity: formatPageIssuesSeverity,
 			extractMessage: extractMessage,
 			getAllIssuesSections: getAllIssuesSections,
 			createBanner: createBanner
diff --git a/tests/qunit/skins.minerva.scripts/test_pageIssues.js b/tests/qunit/skins.minerva.scripts/test_pageIssues.js
index 208eaa7..2959ad3 100644
--- a/tests/qunit/skins.minerva.scripts/test_pageIssues.js
+++ b/tests/qunit/skins.minerva.scripts/test_pageIssues.js
@@ -4,11 +4,24 @@
 		pageIssuesParser = M.require( 'skins.minerva.scripts/pageIssuesParser' ),
 		extractMessage = pageIssues.test.extractMessage,
 		createBanner = pageIssues.test.createBanner,
+		formatPageIssuesSeverity = pageIssues.test.formatPageIssuesSeverity,
 		MEDIUM_ISSUE = {
 			severity: 'MEDIUM',
 			icon: 'i',
 			text: 't'
 		},
+		MEDIUM_MULTIPLE_ISSUE = {
+			severity: 'MEDIUM',
+			isMultiple: true,
+			icon: 'i',
+			text: 't'
+		},
+		LOW_MULTIPLE_ISSUE = {
+			severity: 'LOW',
+			isMultiple: true,
+			icon: 'i',
+			text: 't'
+		},
 		LOW_ISSUE = {
 			severity: 'LOW',
 			icon: 'i',
@@ -64,6 +77,35 @@
 		} );
 	} );
 
+	QUnit.test( 'formatPageIssuesSeverity', function ( assert ) {
+		var multipleIssues = [
+				MEDIUM_MULTIPLE_ISSUE,
+				LOW_MULTIPLE_ISSUE,
+				LOW_MULTIPLE_ISSUE
+			],
+			multipleSingleIssues = [
+				LOW_ISSUE,
+				HIGH_ISSUE,
+				MEDIUM_ISSUE
+			],
+			mixedMultipleSingle = [
+				HIGH_ISSUE,
+				LOW_MULTIPLE_ISSUE,
+				MEDIUM_MULTIPLE_ISSUE,
+				LOW_ISSUE,
+				MEDIUM_ISSUE,
+				HIGH_ISSUE
+			],
+			testMultiple = multipleIssues.reduce( formatPageIssuesSeverity, [] ),
+			testSingle = multipleSingleIssues.reduce( formatPageIssuesSeverity, [] ),
+			testMixed = mixedMultipleSingle.reduce( formatPageIssuesSeverity, [] );
+
+		assert.deepEqual( testMultiple, [ 'MEDIUM' ], 'Multiple issues return one maxSeverity value' );
+		assert.deepEqual( testSingle, [ 'LOW', 'HIGH', 'MEDIUM' ], 'Single issues return each corresponding severity' );
+		assert.deepEqual( testMixed, [ 'HIGH', 'MEDIUM', 'LOW', 'MEDIUM', 'HIGH' ], 'Mixed single/multiple return one value for multiples' );
+
+	} );
+
 	QUnit.test( 'extractMessage', function ( assert ) {
 		this.sandbox.stub( pageIssuesParser, 'parse' ).returns(
 			{