diff --git a/index.js b/index.js
index d58f9de..b317d30 100644
--- a/index.js
+++ b/index.js
@@ -204,15 +204,13 @@ function getLanguagesByScriptGroupInRegion( region ) {
  */
 function sortByScriptGroup( languages ) {
 	var groupedLanguages, scriptGroups, i,
-		sortedByAutonym = [],
 		allLanguages = [];
 
 	groupedLanguages = getLanguagesByScriptGroup( languages );
 	scriptGroups = Object.keys( groupedLanguages ).sort();
 
 	for ( i = 0; i < scriptGroups.length; i++ ) {
-		sortedByAutonym = groupedLanguages[ scriptGroups[i] ].sort( sortByAutonym )
-		allLanguages = allLanguages.concat( sortedByAutonym );
+		allLanguages = allLanguages.concat( groupedLanguages[ scriptGroups[i] ] );
 	}
 
 	return allLanguages;
diff --git a/test/index.js b/test/index.js
index 51368e3..af01207 100644
--- a/test/index.js
+++ b/test/index.js
@@ -127,7 +127,7 @@ describe( 'languagedata', function () {
 
 		languagesAM = [ 'atj', 'chr', 'chy', 'cr', 'en', 'es', 'fr', 'gn', 'haw', 'ike-cans', 'ik', 'kl', 'nl', 'pt', 'qu', 'srn', 'yi' ];
 		assert.deepEqual(
-			languageData.sortByScriptGroup( languagesAM ),
+			languageData.sortByScriptGroup( languagesAM.sort( languageData.sortByAutonym ) ),
 			[ 'atj', 'gn', 'en', 'es', 'fr', 'haw', 'ik', 'kl', 'nl', 'pt', 'qu', 'srn', 'chy', 'yi', 'ike-cans', 'cr', 'chr' ],
 			'languages in region AM are ordered correctly by script group'
 		);