diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ba80fc6..b1f0548 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,4 +1,4 @@
-name: php-solr-explain Github Actions
+name: BUILD
 
 on:
   push:
diff --git a/Classes/Domain/Result/Explanation/Nodes/Explain.php b/Classes/Domain/Result/Explanation/Nodes/Explain.php
index 2cea6fd..dd02ccf 100644
--- a/Classes/Domain/Result/Explanation/Nodes/Explain.php
+++ b/Classes/Domain/Result/Explanation/Nodes/Explain.php
@@ -91,7 +91,7 @@ protected function handleProductParent()
 		$neighbors = $this->getParent()->getChildren();
 
 		if ($neighbors->count() > 1) {
-			$neighborScorePart = array();
+			$neighborScorePart = [];
 			$parentPercentage = $this->getParent()->getAbsoluteImpactPercentage();
 
 			foreach ($neighbors as $neighbor) {
diff --git a/Classes/Domain/Result/Explanation/Nodes/Max.php b/Classes/Domain/Result/Explanation/Nodes/Max.php
index 34004a9..52eacd9 100644
--- a/Classes/Domain/Result/Explanation/Nodes/Max.php
+++ b/Classes/Domain/Result/Explanation/Nodes/Max.php
@@ -20,7 +20,7 @@ public function __construct()
 	public function getTieBreaker()
     {
 
-		$matches = array();
+		$matches = [];
 		preg_match('~plus (?<tiebreaker>.*) times~',$this->getContent(),$matches);
 		if(isset($matches['tiebreaker'])) {
 			return $matches['tiebreaker'];
diff --git a/Classes/Domain/Result/Explanation/Parser.php b/Classes/Domain/Result/Explanation/Parser.php
index a1b4a2d..4203aec 100644
--- a/Classes/Domain/Result/Explanation/Parser.php
+++ b/Classes/Domain/Result/Explanation/Parser.php
@@ -139,7 +139,7 @@ protected function removeLeadingSpacesFromNextLevelContent($tokenParts) {
 	 */
 	protected function getScoreFromContent($nodeName) {
 		$score = 0.0;
-		$scoreMatches 	= array();
+		$scoreMatches 	= [];
 		preg_match('~(?<score>[0-9]*\.[^ ]*)~',$nodeName,$scoreMatches);
 		if(isset($scoreMatches['score']) && (float) $scoreMatches['score'] > 0) {
 			$score = (float) $scoreMatches['score'];
@@ -154,12 +154,12 @@ protected function getScoreFromContent($nodeName) {
 	 */
 	protected function getQueryAttribute($content) {
 		$querystring = '';
-		$matches = array();
+		$matches = [];
 		preg_match("~^#(?<attributes>[^\n]*)~ism", $content, $matches);
 
 		if(isset($matches['attributes'])) {
 			$attributes 		= $matches['attributes'];
-			$attributeMatches 	= array();
+			$attributeMatches 	= [];
 			preg_match('~.*q=(?<querystring>[^&]*)~ism',$attributes,$attributeMatches);
 			if(isset($attributeMatches['querystring'])) {
 				$querystring = $attributeMatches['querystring'];
@@ -177,7 +177,7 @@ protected function getQueryAttribute($content) {
 	 */
 	protected function getFieldNameFromNodeName($nodeName) {
 		$result 	= '';
-		$matches 	= array();
+		$matches 	= [];
         if (mb_strpos($nodeName,'weight(Synonym(') !== false ) {
             preg_match('~weight\(Synonym\((?<fieldname>[^\):]*)~', $nodeName, $matches);
         } elseif(mb_strpos($nodeName,'weight(') !== false ){
diff --git a/Classes/Domain/Result/Parser.php b/Classes/Domain/Result/Parser.php
index a5ee831..3c788b5 100644
--- a/Classes/Domain/Result/Parser.php
+++ b/Classes/Domain/Result/Parser.php
@@ -123,7 +123,7 @@ protected function extractDocumentFields($fieldNode, Document $document) {
 
 			if ($fieldNode->nodeName == 'arr') {
 				//multivalue field
-				$value = array();
+				$value = [];
 				foreach ($fieldNode->childNodes as $singleField) {
 					$value[] = $singleField->textContent;
 				}
diff --git a/README.md b/README.md
index c41b514..af5760e 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # PHP Solr Explain
 
-[![Build Status](https://travis-ci.org/TYPO3-Solr/php-solr-explain.svg?branch=master)](https://travis-ci.org/TYPO3-Solr/php-solr-explain)
+[![Build Status](https://github.com/TYPO3-Solr/php-solr-explain/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/TYPO3-Solr/php-solr-explain/actions?query=branch%3Amaster)
 [![Latest Stable Version](https://poser.pugx.org/apache-solr-for-typo3/php-solr-explain/v/stable)](https://packagist.org/packages/apache-solr-for-typo3/php-solr-explain)
 [![Latest Unstable Version](https://poser.pugx.org/apache-solr-for-typo3/php-solr-explain/v/unstable)](https://packagist.org/packages/apache-solr-for-typo3/php-solr-explain)
 [![License](https://poser.pugx.org/apache-solr-for-typo3/php-solr-explain/license)](https://packagist.org/packages/apache-solr-for-typo3/php-solr-explain)
diff --git a/Tests/Domain/Result/Explanation/ExplainServiceTestCase.php b/Tests/Domain/Result/Explanation/ExplainServiceTestCase.php
index a3d897f..6acbae0 100644
--- a/Tests/Domain/Result/Explanation/ExplainServiceTestCase.php
+++ b/Tests/Domain/Result/Explanation/ExplainServiceTestCase.php
@@ -22,7 +22,7 @@ public function testFixture1()
 			'bar'
 		);
 
-		$this->assertEquals(array('name' => 100), $result);
+		$this->assertEquals(['name' => 100], $result);
 	}
 
     /**
diff --git a/Tests/Domain/Result/Explanation/Visitors/SummarizeFieldImpactsTestCase.php b/Tests/Domain/Result/Explanation/Visitors/SummarizeFieldImpactsTestCase.php
index db5757e..7f2c9e0 100644
--- a/Tests/Domain/Result/Explanation/Visitors/SummarizeFieldImpactsTestCase.php
+++ b/Tests/Domain/Result/Explanation/Visitors/SummarizeFieldImpactsTestCase.php
@@ -37,7 +37,7 @@ public function testCanSummarizeFieldImpactFixture001()
 		$explain->getRootNode()->visitNodes($visitor);
 
 		$this->assertEquals(100.0,$visitor->getFieldImpact('name'));
-		$this->assertEquals(array('name'),$visitor->getRelevantFieldNames());
+		$this->assertEquals(['name'],$visitor->getRelevantFieldNames());
 	}
 
 	/**
@@ -50,7 +50,7 @@ public function testCanSummarizeFieldImpactFixture003()
 		$explain->getRootNode()->visitNodes($visitor);
 
 		$this->assertEquals(95.756597168764,$visitor->getFieldImpact('price'));
-		$this->assertEquals(array('name','manu','price'),$visitor->getRelevantFieldNames());
+		$this->assertEquals(['name','manu','price'],$visitor->getRelevantFieldNames());
 	}
 
 	/**
@@ -63,7 +63,7 @@ public function testCanSummarizeFieldImpactFixture004()
 		$explain->getRootNode()->visitNodes($visitor);
 
 		$this->assertEquals(100.0,$visitor->getFieldImpact('name'));
-		$this->assertEquals(array('name','price'),$visitor->getRelevantFieldNames());
+		$this->assertEquals(['name','price'],$visitor->getRelevantFieldNames());
 	}
 
 	/**
@@ -75,7 +75,7 @@ public function testCanSummarizeCustomTieBreakerFixture()
 		$visitor = new SummarizeFieldImpacts();
 		$explain->getRootNode()->visitNodes($visitor);
 
-		$this->assertEquals(array('expandedcontent','content','doctype'),$visitor->getRelevantFieldNames());
+		$this->assertEquals(['expandedcontent','content','doctype'],$visitor->getRelevantFieldNames());
 		$this->assertEquals(47.9,round($visitor->getFieldImpact('doctype'),1));
 		$this->assertEquals(47.9,round($visitor->getFieldImpact('expandedcontent'),1));
 		$this->assertEquals(4.2,round($visitor->getFieldImpact('content'),1));
@@ -90,7 +90,7 @@ public function testCanSummarizeCustomTieBreaker2Fixture()
 		$visitor = new SummarizeFieldImpacts();
 		$explain->getRootNode()->visitNodes($visitor);
 
-		$this->assertEquals(array('pr_title','doctype'),$visitor->getRelevantFieldNames());
+		$this->assertEquals(['pr_title','doctype'],$visitor->getRelevantFieldNames());
 		$this->assertEquals(0.07,round($visitor->getFieldImpact('doctype'),2));
 		$this->assertEquals(99.93,round($visitor->getFieldImpact('pr_title'),2));
 	}
@@ -105,7 +105,7 @@ public function testCanSummarizeCustomTieBreaker3Fixture()
 		$visitor = new SummarizeFieldImpacts();
 		$explain->getRootNode()->visitNodes($visitor);
 
-		$this->assertEquals(array('keywords','expandedcontent','content','description','doctype'),$visitor->getRelevantFieldNames());
+		$this->assertEquals(['keywords','expandedcontent','content','description','doctype'],$visitor->getRelevantFieldNames());
 		$this->assertEquals(0.00,round($visitor->getFieldImpact('keywords'),2));
 		$this->assertEquals(7.55,round($visitor->getFieldImpact('expandedcontent'),2));
 		$this->assertEquals(4.72,round($visitor->getFieldImpact('content'),2));
diff --git a/Tests/Domain/Result/Explanation/Visitors/SummarizeLeafImpactsTestCase.php b/Tests/Domain/Result/Explanation/Visitors/SummarizeLeafImpactsTestCase.php
index 3414caa..1507702 100644
--- a/Tests/Domain/Result/Explanation/Visitors/SummarizeLeafImpactsTestCase.php
+++ b/Tests/Domain/Result/Explanation/Visitors/SummarizeLeafImpactsTestCase.php
@@ -33,45 +33,45 @@ protected function getExplain($filename)
 	 */
 	public function leafSumFixtureNameDataProvider()
     {
-		return array(
-			array('3.0.001'),
-			array('3.0.002'),
-			array('3.0.003'),
-			array('3.0.004'),
-			array('3.0.005'),
-			array('3.4.001'),
-			array('3.4.002'),
-			array('3.4.003'),
-			array('3.4.004'),
-			array('3.4.005'),
-			array('3.4.006'),
-			array('3.4.007'),
-			array('3.4.008'),
-			array('3.4.009'),
-			array('3.4.010'),
-			array('3.4.011'),
-			array('3.4.012'),
-			array('3.4.013'),
-			array('3.4.014'),
-			array('3.4.015'),
-			array('3.4.016'),
-			array('3.4.017'),
+		return [
+			['3.0.001'],
+			['3.0.002'],
+			['3.0.003'],
+			['3.0.004'],
+			['3.0.005'],
+			['3.4.001'],
+			['3.4.002'],
+			['3.4.003'],
+			['3.4.004'],
+			['3.4.005'],
+			['3.4.006'],
+			['3.4.007'],
+			['3.4.008'],
+			['3.4.009'],
+			['3.4.010'],
+			['3.4.011'],
+			['3.4.012'],
+			['3.4.013'],
+			['3.4.014'],
+			['3.4.015'],
+			['3.4.016'],
+			['3.4.017'],
 				//contains invalid content therefore no overall impact of 100 expected
-			array('3.4.018',0.0),
-			array('3.4.019'),
-			array('3.4.020'),
-			array('3.4.021'),
-			array('3.4.022'),
-			array('3.4.023'),
-			array('3.4.024'),
-			array('3.4.025'),
-			array('3.4.026'),
-			array('3.4.027'),
-			array('3.4.028'),
-			array('4.0.001'),
-			array('complex'),
-			array('custom.tieBreaker')
-		);
+			['3.4.018',0.0],
+			['3.4.019'],
+			['3.4.020'],
+			['3.4.021'],
+			['3.4.022'],
+			['3.4.023'],
+			['3.4.024'],
+			['3.4.025'],
+			['3.4.026'],
+			['3.4.027'],
+			['3.4.028'],
+			['4.0.001'],
+			['complex'],
+			['custom.tieBreaker']
+        ];
 	}
 
 	/**
diff --git a/Tests/Domain/Result/ParserTestCase.php b/Tests/Domain/Result/ParserTestCase.php
index 12a7821..aab3daf 100644
--- a/Tests/Domain/Result/ParserTestCase.php
+++ b/Tests/Domain/Result/ParserTestCase.php
@@ -27,7 +27,7 @@ public function testFixture001()
 		);
 
 		$this->assertEquals(
-			array('electronics','hard drive'),
+            ['electronics','hard drive'],
 			$result->getDocumentCollection()->getDocument(1)->getFieldByName('cat')->getValue()
 		);