diff --git a/tests/phpunit/LinkerTest.php b/tests/phpunit/LinkerTest.php
index 31ce2ca..b084861 100644
--- a/tests/phpunit/LinkerTest.php
+++ b/tests/phpunit/LinkerTest.php
@@ -37,7 +37,8 @@
 class LinkTitlesLinkerTest extends LinkTitles\TestCase {
 	protected $title;
 
-	protected function setUp() {
+	protected function setUp(): void
+	{
 		parent::setUp(); // call last to have the Targets object invalidated after inserting the page
 	}
 
@@ -315,13 +316,13 @@ class LinkTitlesLinkerTest extends LinkTitles\TestCase {
 
 		// Reset namespace caches.
 		// See https://stackoverflow.com/q/45974979/270712
-		MWNamespace::getCanonicalNamespaces( true );
+		\MWNamespace::getCanonicalNamespaces(true);
 		global $wgContLang;
 		$wgContLang->resetNamespaces();
 		$this->assertTrue( MWNamespace::exists( $ns ), "The namespace with id $ns should exist!" );
 
 		$this->insertPage( "in custom namespace", 'This is a page in a custom namespace', $ns );
-		LinKTitles\Targets::invalidate();
+		LinkTitles\Targets::invalidate();
 		$linker = new LinkTitles\Linker( $config );
 		$source = LinkTitles\Source::createFromTitleAndText( $this->title, $input, $config );
 		$result = $linker->linkContent( $source );
diff --git a/tests/phpunit/SplitterTest.php b/tests/phpunit/SplitterTest.php
index 28f3348..02252e7 100644
--- a/tests/phpunit/SplitterTest.php
+++ b/tests/phpunit/SplitterTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Copyright 2012-2018 Daniel Kraus <bovender@bovender.de> ('bovender')
  *
@@ -25,78 +26,81 @@
  *
  * @group bovender
  */
-class SplitterTest extends MediaWikiTestCase {
+class SplitterTest extends \MediaWikiTestCase
+{
 	/**
 	 * @dataProvider provideSplitData
 	 */
-	public function testSplit( $skipTemplates, $parseHeadings, $input, $expectedOutput ) {
+	public function testSplit($skipTemplates, $parseHeadings, $input, $expectedOutput)
+	{
 		$config = new LinkTitles\Config();
 		$config->skipTemplates = $skipTemplates;
 		$config->parseHeadings = $parseHeadings;
 		LinkTitles\Splitter::invalidate();
-		$splitter = LinkTitles\Splitter::singleton( $config );
-		$this->assertSame( $skipTemplates, $splitter->config->skipTemplates, 'Splitter has incorrect skipTemplates config');
-		$this->assertSame( $parseHeadings, $splitter->config->parseHeadings, 'Splitter has incorrect parseHeadings config');
-		$this->assertSame( $expectedOutput, $splitter->split( $input ) );
+		$splitter = LinkTitles\Splitter::singleton($config);
+		$this->assertSame($skipTemplates, $splitter->config->skipTemplates, 'Splitter has incorrect skipTemplates config');
+		$this->assertSame($parseHeadings, $splitter->config->parseHeadings, 'Splitter has incorrect parseHeadings config');
+		$this->assertSame($expectedOutput, $splitter->split($input));
 	}
 
 	// TODO: Add more examples.
-	public static function provideSplitData() {
+	public static function provideSplitData()
+	{
 		return [
 			[
 				true, // skipTemplates
 				false, // parseHeadings
 				'this may be linked [[this may not be linked]]',
-				[ 'this may be linked ', '[[this may not be linked]]', '' ]
+				['this may be linked ', '[[this may not be linked]]', '']
 			],
 			[
 				true, // skipTemplates
 				false, // parseHeadings
 				'this may be linked <gallery>this may not be linked</gallery>',
-				[ 'this may be linked ', '<gallery>this may not be linked</gallery>', '' ]
+				['this may be linked ', '<gallery>this may not be linked</gallery>', '']
 			],
 			[
 				true, // skipTemplates
 				false, // parseHeadings
 				'With skipTemplates = true, this may be linked {{mytemplate|param=link target}}',
-				[ 'With skipTemplates = true, this may be linked ', '{{mytemplate|param=link target}}', '' ]
+				['With skipTemplates = true, this may be linked ', '{{mytemplate|param=link target}}', '']
 			],
 			[
 				false, // skipTemplates
 				false, // parseHeadings
 				'With skipTemplates = false, this may be linked {{mytemplate|param=link target}}',
-				[ 'With skipTemplates = false, this may be linked ', '{{mytemplate|param=', 'link target}}' ]
+				['With skipTemplates = false, this may be linked ', '{{mytemplate|param=', 'link target}}']
 			],
 			[
 				true, // skipTemplates
 				false, // parseHeadings
 				'With skipTemplates = true, this may be linked {{mytemplate|param={{transcluded}}}}',
-				[ 'With skipTemplates = true, this may be linked ', '{{mytemplate|param={{transcluded}}}}', '' ]
+				['With skipTemplates = true, this may be linked ', '{{mytemplate|param={{transcluded}}}}', '']
 			],
 			[
 				true, // skipTemplates
 				true, // parseHeadings
 				"With parseHeadings = true,\n==a heading may be linked==\n",
-				[ "With parseHeadings = true,\n==a heading may be linked==\n" ]
+				["With parseHeadings = true,\n==a heading may be linked==\n"]
 			],
 			[
 				true, // skipTemplates
 				false, // parseHeadings
 				// no trailing newline in the following string because it would be swallowed
 				"With parseHeadings = false,\n==a heading may not be linked==",
-				[ "With parseHeadings = false,\n", "==a heading may not be linked==", '' ]
+				["With parseHeadings = false,\n", "==a heading may not be linked==", '']
 			],
 			[
 				true, // skipTemplates
 				true, // parseHeadings
 				"With parseHeadings = true,\n==<span>a heading with spans may be linked</span>==\n",
-				[ "With parseHeadings = true,\n==", "<span>", "a heading with spans may be linked", "</span>", "==\n" ]
+				["With parseHeadings = true,\n==", "<span>", "a heading with spans may be linked", "</span>", "==\n"]
 			],
 			[
 				true, // skipTemplates
 				true, // parseHeadings
 				"With parseHeadings = true,\n==<div>a heading with divs may be linked</div>==\n",
-				[ "With parseHeadings = true,\n==", "<div>", "a heading with divs may be linked", "</div>", "==\n" ]
+				["With parseHeadings = true,\n==", "<div>", "a heading with divs may be linked", "</div>", "==\n"]
 			],
 			// Improperly formatted headings cannot be dealt with appropriately for now
 			// [
@@ -109,7 +113,7 @@ class SplitterTest extends MediaWikiTestCase {
 				true, // skipTemplates
 				true, // parseHeadings
 				"Text <noautolinks>in noautolinks tag</noautolinks>should be excluded",
-				[ "Text ", "<noautolinks>in noautolinks tag</noautolinks>", "should be excluded" ]
+				["Text ", "<noautolinks>in noautolinks tag</noautolinks>", "should be excluded"]
 			],
 		];
 	}
diff --git a/tests/phpunit/TargetTest.php b/tests/phpunit/TargetTest.php
index 8b3a282..cd35a20 100644
--- a/tests/phpunit/TargetTest.php
+++ b/tests/phpunit/TargetTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Copyright 2012-2018 Daniel Kraus <bovender@bovender.de> ('bovender')
  *
@@ -23,39 +24,44 @@
 /**
  * @group bovender
  */
-class TargetTest extends MediaWikiTestCase {
+class TargetTest extends \MediaWikiTestCase
+{
 
 	/**
 	 * @dataProvider provideStartOnly
 	 */
-	public function testTargetWordStartOnly( $enabled, $delimiter ) {
+	public function testTargetWordStartOnly($enabled, $delimiter)
+	{
 		$config = new LinkTitles\Config();
 		$config->wordStartOnly = $enabled;
-		$target = new LinKTitles\Target( NS_MAIN, 'test page', $config );
-		$this->assertSame( $delimiter, $target->wordStart );
+		$target = new LinKTitles\Target(NS_MAIN, 'test page', $config);
+		$this->assertSame($delimiter, $target->wordStart);
 	}
 
-	public static function provideStartOnly() {
+	public static function provideStartOnly()
+	{
 		return [
-			[ true, '(?<!\pL|\pN)' ],
-			[ false, '' ]
+			[true, '(?<!\pL|\pN)'],
+			[false, '']
 		];
 	}
 
 	/**
 	 * @dataProvider provideEndOnly
 	 */
-	public function testTargetWordEndOnly( $enabled, $delimiter ) {
+	public function testTargetWordEndOnly($enabled, $delimiter)
+	{
 		$config = new LinkTitles\Config();
 		$config->wordEndOnly = $enabled;
-		$target = new LinKTitles\Target( NS_MAIN, 'test page', $config );
-		$this->assertSame( $delimiter, $target->wordEnd );
+		$target = new LinKTitles\Target(NS_MAIN, 'test page', $config);
+		$this->assertSame($delimiter, $target->wordEnd);
 	}
 
-	public static function provideEndOnly() {
+	public static function provideEndOnly()
+	{
 		return [
-			[ true, '(?!\pL|\pN)' ],
-			[ false, '' ]
+			[true, '(?!\pL|\pN)'],
+			[false, '']
 		];
 	}
 }
diff --git a/tests/phpunit/TestCase.php b/tests/phpunit/TestCase.php
index e41fbde..cadf370 100644
--- a/tests/phpunit/TestCase.php
+++ b/tests/phpunit/TestCase.php
@@ -22,11 +22,13 @@
 namespace LinkTitles;
 
 abstract class TestCase extends \MediaWikiTestCase {
-	protected function setUp() {
+	protected function setUp(): void
+	{
 		parent::setUp();
 	}
 
-	protected function tearDown() {
+	protected function tearDown(): void
+	{
 		parent::tearDown();
 	}