add needed type hints for phpunit8

This will break a lot of plugin tests, but can't be avoided

51 files changed, 73 insertions, 73 deletions

diff --git a/_test/core/DokuWikiTest.php b/_test/core/DokuWikiTest.php
index 25311bbac..68fd868f5 100644
--- a/_test/core/DokuWikiTest.php
+++ b/_test/core/DokuWikiTest.php
@@ -42,7 +42,7 @@ abstract class DokuWikiTest extends PHPUnit\Framework\TestCase {
      *
      * This is ran before each test class
      */
-    public static function setUpBeforeClass() {
+    public static function setUpBeforeClass() : void {
         // just to be safe not to delete something undefined later
         if(!defined('TMP_DIR')) die('no temporary directory');
         if(!defined('DOKU_TMP_DATA')) die('no temporary data directory');
@@ -58,7 +58,7 @@ abstract class DokuWikiTest extends PHPUnit\Framework\TestCase {
      * @throws Exception if plugin actions fail
      * @return void
      */
-    public function setUp() {
+    public function setUp() : void {
 
         // reload config
         global $conf, $config_cascade;
diff --git a/_test/tests/inc/Subscriptions/BulkSubscriptionsSenderTest.php b/_test/tests/inc/Subscriptions/BulkSubscriptionsSenderTest.php
index 3bc6a9c2f..9b2d230ad 100644
--- a/_test/tests/inc/Subscriptions/BulkSubscriptionsSenderTest.php
+++ b/_test/tests/inc/Subscriptions/BulkSubscriptionsSenderTest.php
@@ -12,7 +12,7 @@ class BulkSubscriptionsSenderTest extends DokuWikiTest
 
     private $originalSubscriptionConfig;
 
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp();
         global $conf;
@@ -20,7 +20,7 @@ class BulkSubscriptionsSenderTest extends DokuWikiTest
         $conf['subscribers'] = true;
     }
 
-    protected function tearDown()
+    protected function tearDown() : void
     {
         global $conf;
         $conf['subscribers'] = $this->originalSubscriptionConfig;
diff --git a/_test/tests/inc/Subscriptions/SubscriberManagerTest.php b/_test/tests/inc/Subscriptions/SubscriberManagerTest.php
index 1fcd7c84b..6c8b28fc4 100644
--- a/_test/tests/inc/Subscriptions/SubscriberManagerTest.php
+++ b/_test/tests/inc/Subscriptions/SubscriberManagerTest.php
@@ -9,7 +9,7 @@ class SubscriberManagerTest extends DokuWikiTest
 {
     private $originalSubscriptionConfig;
 
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp();
         global $conf;
@@ -17,7 +17,7 @@ class SubscriberManagerTest extends DokuWikiTest
         $conf['subscribers'] = true;
     }
 
-    protected function tearDown()
+    protected function tearDown() : void
     {
         global $conf;
         $conf['subscribers'] = $this->originalSubscriptionConfig;
diff --git a/_test/tests/inc/XmlRpcServer.test.php b/_test/tests/inc/XmlRpcServer.test.php
index 47d2f8cfc..6d5dffc76 100644
--- a/_test/tests/inc/XmlRpcServer.test.php
+++ b/_test/tests/inc/XmlRpcServer.test.php
@@ -15,7 +15,7 @@ class XmlRpcServerTest extends DokuWikiTest
 {
     protected $server;
 
-    function setUp()
+    function setUp () : void
     {
         parent::setUp();
         global $conf;
diff --git a/_test/tests/inc/auth_aclcheck.test.php b/_test/tests/inc/auth_aclcheck.test.php
index 2b5342e43..c2acafbf8 100644
--- a/_test/tests/inc/auth_aclcheck.test.php
+++ b/_test/tests/inc/auth_aclcheck.test.php
@@ -6,7 +6,7 @@ class auth_acl_test extends DokuWikiTest {
 
     protected $oldAuthAcl;
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         global $AUTH_ACL;
         global $auth;
@@ -14,7 +14,7 @@ class auth_acl_test extends DokuWikiTest {
         $auth = new AuthPlugin();
     }
 
-    function tearDown() {
+    function tearDown() : void {
         global $AUTH_ACL;
         $AUTH_ACL = $this->oldAuthAcl;
 
diff --git a/_test/tests/inc/auth_aclcheck_caseinsensitive.test.php b/_test/tests/inc/auth_aclcheck_caseinsensitive.test.php
index af0f17223..77264dc52 100644
--- a/_test/tests/inc/auth_aclcheck_caseinsensitive.test.php
+++ b/_test/tests/inc/auth_aclcheck_caseinsensitive.test.php
@@ -6,7 +6,7 @@ class auth_acl_caseinsensitive_test extends DokuWikiTest {
     protected $oldAuth;
     protected $oldAuthAcl;
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         global $auth;
         global $AUTH_ACL;
@@ -17,7 +17,7 @@ class auth_acl_caseinsensitive_test extends DokuWikiTest {
         $auth = new AuthCaseInsensitivePlugin();
     }
 
-    function tearDown() {
+    function tearDown() : void {
         global $conf;
         global $AUTH_ACL;
         global $auth;
diff --git a/_test/tests/inc/auth_admincheck.test.php b/_test/tests/inc/auth_admincheck.test.php
index 718cd642f..ff9ca6e4f 100644
--- a/_test/tests/inc/auth_admincheck.test.php
+++ b/_test/tests/inc/auth_admincheck.test.php
@@ -8,7 +8,7 @@ class auth_admin_test extends DokuWikiTest
 
     private $oldauth;
 
-    function setUp()
+    function setUp() : void
     {
         parent::setUp();
         global $auth;
@@ -27,7 +27,7 @@ class auth_admin_test extends DokuWikiTest
         $auth = new AuthCaseInsensitivePlugin();
     }
 
-    function teardown()
+    function tearDown() : void
     {
         global $auth;
         global $AUTH_ACL;
diff --git a/_test/tests/inc/auth_loadacl.test.php b/_test/tests/inc/auth_loadacl.test.php
index e8d9f6696..7fae2e90e 100644
--- a/_test/tests/inc/auth_loadacl.test.php
+++ b/_test/tests/inc/auth_loadacl.test.php
@@ -7,14 +7,14 @@
 
 class auth_loadacl_test extends DokuWikiTest {
 
-    function setUp() {
+    function setUp() : void {
         global $USERINFO;
         parent::setUp();
         $_SERVER['REMOTE_USER'] = 'testuser';
         $USERINFO['grps'] = array('foo','bar');
     }
 
-    function tearDown() {
+    function tearDown() : void {
         parent::tearDown();
     }
 
diff --git a/_test/tests/inc/auth_nameencode.test.php b/_test/tests/inc/auth_nameencode.test.php
index 86db843d6..a41a4df76 100644
--- a/_test/tests/inc/auth_nameencode.test.php
+++ b/_test/tests/inc/auth_nameencode.test.php
@@ -2,7 +2,7 @@
 
 class auth_nameencode_test extends DokuWikiTest {
 
-    function tearDown() {
+    function tearDown() : void {
         global $cache_authname;
         $cache_authname = array();
     }
diff --git a/_test/tests/inc/cache_use.test.php b/_test/tests/inc/cache_use.test.php
index 3a1028d13..76e81a546 100644
--- a/_test/tests/inc/cache_use.test.php
+++ b/_test/tests/inc/cache_use.test.php
@@ -13,7 +13,7 @@ class cache_use_test extends DokuWikiTest {
     /** @var CacheRenderer $cache */
     private $cache;
 
-    function setUp() {
+    function setUp() : void {
         global $ID, $conf;
         parent::setUp();
 
diff --git a/_test/tests/inc/changelog_getRevisionsAround.test.php b/_test/tests/inc/changelog_getRevisionsAround.test.php
index ad6d3afcf..2504487cc 100644
--- a/_test/tests/inc/changelog_getRevisionsAround.test.php
+++ b/_test/tests/inc/changelog_getRevisionsAround.test.php
@@ -31,7 +31,7 @@ class changelog_getrevisionsaround_test extends DokuWikiTest {
     );
     private $pageid = 'mailinglist';
 
-    function setup() {
+    function setup() : void {
         parent::setup();
         global $cache_revinfo;
         $cache =& $cache_revinfo;
diff --git a/_test/tests/inc/changelog_getlastrevisionat.test.php b/_test/tests/inc/changelog_getlastrevisionat.test.php
index cec54f6db..cf81ce042 100644
--- a/_test/tests/inc/changelog_getlastrevisionat.test.php
+++ b/_test/tests/inc/changelog_getlastrevisionat.test.php
@@ -14,7 +14,7 @@ class changelog_getlastrevisionat_test extends DokuWikiTest {
 
     private $pageid = 'mailinglist';
 
-    function setup() {
+    function setup() : void {
         parent::setup();
         global $cache_revinfo;
         $cache =& $cache_revinfo;
diff --git a/_test/tests/inc/changelog_getrelativerevision.test.php b/_test/tests/inc/changelog_getrelativerevision.test.php
index 49d7a0915..4268e702f 100644
--- a/_test/tests/inc/changelog_getrelativerevision.test.php
+++ b/_test/tests/inc/changelog_getrelativerevision.test.php
@@ -14,7 +14,7 @@ class changelog_getrelativerevision_test extends DokuWikiTest {
     private $logline = "1362525899	127.0.0.1	E	mailinglist	pubcie	[Data entry] 	\n";
     private $pageid = 'mailinglist';
 
-    function setup() {
+    function setup() : void {
         parent::setup();
         global $cache_revinfo;
         $cache =& $cache_revinfo;
diff --git a/_test/tests/inc/changelog_getrevisioninfo.test.php b/_test/tests/inc/changelog_getrevisioninfo.test.php
index 2d7ad131a..3decad0ef 100644
--- a/_test/tests/inc/changelog_getrevisioninfo.test.php
+++ b/_test/tests/inc/changelog_getrevisioninfo.test.php
@@ -15,7 +15,7 @@ class changelog_getrevisionsinfo_test extends DokuWikiTest {
     private $firstlogline = "1374261194	127.0.0.1	E	mailinglist	pubcie		\n";
     private $pageid = 'mailinglist';
 
-    function setup() {
+    function setup() : void {
         parent::setup();
         global $cache_revinfo;
         $cache =& $cache_revinfo;
diff --git a/_test/tests/inc/changelog_getrevisions.test.php b/_test/tests/inc/changelog_getrevisions.test.php
index e29b80997..0bd378c3c 100644
--- a/_test/tests/inc/changelog_getrevisions.test.php
+++ b/_test/tests/inc/changelog_getrevisions.test.php
@@ -31,7 +31,7 @@ class changelog_getrevisions_test extends DokuWikiTest {
     );
     private $pageid = 'mailinglist';
 
-    function setup() {
+    function setup() : void {
         parent::setup();
         global $cache_revinfo;
         $cache =& $cache_revinfo;
diff --git a/_test/tests/inc/common_basicinfo.test.php b/_test/tests/inc/common_basicinfo.test.php
index 1bcc1a0d5..bdb77087e 100644
--- a/_test/tests/inc/common_basicinfo.test.php
+++ b/_test/tests/inc/common_basicinfo.test.php
@@ -2,7 +2,7 @@
 
 class common_infofunctions_test extends DokuWikiTest {
 
-    function setup(){
+    function setup() : void {
         parent::setup();
 
         global $USERINFO;
diff --git a/_test/tests/inc/common_clientip.test.php b/_test/tests/inc/common_clientip.test.php
index b06390ee4..a546d4faf 100644
--- a/_test/tests/inc/common_clientip.test.php
+++ b/_test/tests/inc/common_clientip.test.php
@@ -2,7 +2,7 @@
 
 class common_clientIP_test extends DokuWikiTest {
 
-    function setup(){
+    function setup() : void {
         parent::setup();
 
         global $conf;
diff --git a/_test/tests/inc/common_mediainfo.test.php b/_test/tests/inc/common_mediainfo.test.php
index cc5b17ec7..685a36be9 100644
--- a/_test/tests/inc/common_mediainfo.test.php
+++ b/_test/tests/inc/common_mediainfo.test.php
@@ -1,8 +1,8 @@
 <?php
 
 class common_basicinfo_test extends DokuWikiTest {
- 
-    function setup(){
+
+    function setup() : void {
         parent::setup();
 
         global $USERINFO; 
diff --git a/_test/tests/inc/common_pageinfo.test.php b/_test/tests/inc/common_pageinfo.test.php
index adc9538d2..47651240f 100644
--- a/_test/tests/inc/common_pageinfo.test.php
+++ b/_test/tests/inc/common_pageinfo.test.php
@@ -6,7 +6,7 @@
  */
 class common_pageinfo_test extends DokuWikiTest {
 
-    function setup(){
+    function setup() : void {
         parent::setup();
 
         global $USERINFO;
diff --git a/_test/tests/inc/httpclient_https.test.php b/_test/tests/inc/httpclient_https.test.php
index 0163501b2..f16f52e13 100644
--- a/_test/tests/inc/httpclient_https.test.php
+++ b/_test/tests/inc/httpclient_https.test.php
@@ -4,7 +4,7 @@ require_once dirname(__FILE__).'/httpclient_http.test.php';
 class httpclient_https_test extends httpclient_http_test {
     protected $server = 'https://eu.httpbin.org/';
 
-    public function setUp(){
+    public function setUp() : void {
         // skip tests when this PHP has no SSL support
         $transports = stream_get_transports();
         if(!in_array('ssl',$transports)){
diff --git a/_test/tests/inc/httpclient_https_proxy.test.php b/_test/tests/inc/httpclient_https_proxy.test.php
index 2e9381d07..9ad0a3531 100644
--- a/_test/tests/inc/httpclient_https_proxy.test.php
+++ b/_test/tests/inc/httpclient_https_proxy.test.php
@@ -4,7 +4,7 @@ require_once dirname(__FILE__).'/httpclient_http_proxy.test.php';
 class httpclient_https_proxy_test extends httpclient_http_proxy_test {
     protected $url = 'https://eu.httpbin.org/user-agent';
 
-    public function setUp(){
+    public function setUp() : void {
         // skip tests when this PHP has no SSL support
         $transports = stream_get_transports();
         if(!in_array('ssl',$transports)){
diff --git a/_test/tests/inc/indexer_indexing.test.php b/_test/tests/inc/indexer_indexing.test.php
index 3d4777f11..8c28cfb63 100644
--- a/_test/tests/inc/indexer_indexing.test.php
+++ b/_test/tests/inc/indexer_indexing.test.php
@@ -5,7 +5,7 @@
  * @author Michael Hamann <michael@content-space.de>
  */
 class indexer_indexing_test extends DokuWikiTest {
-    public function setUp() {
+    public function setUp() : void {
         parent::setUp();
         saveWikiText('testpage', 'Foo bar baz.', 'Test initialization');
         saveWikiText('notfound', 'Foon barn bazn.', 'Test initialization');
diff --git a/_test/tests/inc/indexer_rename.test.php b/_test/tests/inc/indexer_rename.test.php
index 2dbe6dcad..97b51be2c 100644
--- a/_test/tests/inc/indexer_rename.test.php
+++ b/_test/tests/inc/indexer_rename.test.php
@@ -8,7 +8,7 @@ class indexer_rename_test extends DokuWikiTest {
 
     private $old_id = 'old_testid';
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         $this->indexer = idx_get_indexer();
         $this->indexer->clear();
diff --git a/_test/tests/inc/media_searchlist.test.php b/_test/tests/inc/media_searchlist.test.php
index b881ccc95..8b3e7c455 100644
--- a/_test/tests/inc/media_searchlist.test.php
+++ b/_test/tests/inc/media_searchlist.test.php
@@ -23,7 +23,7 @@ class media_searchlist_test extends DokuWikiTest {
      *
      * @throws Exception
      */
-    function setUp() {
+    function setUp() : void {
         //create some files to search
         $png = mediaFN('wiki:kind_zu_katze.png');
         $ogv = mediaFN('wiki:kind_zu_katze.ogv');
diff --git a/_test/tests/inc/pageutils_clean_id.test.php b/_test/tests/inc/pageutils_clean_id.test.php
index 369e0b849..17d3a9ae1 100644
--- a/_test/tests/inc/pageutils_clean_id.test.php
+++ b/_test/tests/inc/pageutils_clean_id.test.php
@@ -4,7 +4,7 @@ class init_clean_id_test extends DokuWikiTest
 {
 
     /** @inheritDoc */
-    function teardown()
+    function teardown() : void
     {
         global $cache_cleanid;
         $cache_cleanid = array();
diff --git a/_test/tests/inc/pageutils_findnearest.test.php b/_test/tests/inc/pageutils_findnearest.test.php
index 55db44afa..4f97f5be9 100644
--- a/_test/tests/inc/pageutils_findnearest.test.php
+++ b/_test/tests/inc/pageutils_findnearest.test.php
@@ -6,7 +6,7 @@ class pageutils_findnearest_test extends DokuWikiTest {
 
     protected $oldAuthAcl;
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         global $AUTH_ACL;
         global $auth;
@@ -25,7 +25,7 @@ class pageutils_findnearest_test extends DokuWikiTest {
         );
     }
 
-    function tearDown() {
+    function tearDown() : void {
         global $AUTH_ACL;
         $AUTH_ACL = $this->oldAuthAcl;
     }
diff --git a/_test/tests/inc/parser/parser.inc.php b/_test/tests/inc/parser/parser.inc.php
index 153f67b26..f0d141eb9 100644
--- a/_test/tests/inc/parser/parser.inc.php
+++ b/_test/tests/inc/parser/parser.inc.php
@@ -13,13 +13,13 @@ abstract class TestOfDoku_Parser extends DokuWikiTest {
     /** @var  Doku_Handler */
     protected $H;
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         $this->H = new Doku_Handler();
         $this->P = new Parser($this->H);
     }
 
-    function tearDown() {
+    function tearDown() : void {
         unset($this->P);
         unset($this->H);
     }
diff --git a/_test/tests/inc/parser/parser_code.test.php b/_test/tests/inc/parser/parser_code.test.php
index 961db7dd2..c700ed10a 100644
--- a/_test/tests/inc/parser/parser_code.test.php
+++ b/_test/tests/inc/parser/parser_code.test.php
@@ -11,7 +11,7 @@ require_once 'parser.inc.php';
  */
 class TestOfDoku_Parser_Code extends TestOfDoku_Parser {
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         $this->P->addMode('code',new Code());
     }
diff --git a/_test/tests/inc/parser/parser_file.test.php b/_test/tests/inc/parser/parser_file.test.php
index 407b04a48..23aa8ef5b 100644
--- a/_test/tests/inc/parser/parser_file.test.php
+++ b/_test/tests/inc/parser/parser_file.test.php
@@ -6,7 +6,7 @@ require_once 'parser.inc.php';
 
 class TestOfDoku_Parser_File extends TestOfDoku_Parser {
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         $this->P->addMode('file',new File());
     }
diff --git a/_test/tests/inc/parser/parser_footnote.test.php b/_test/tests/inc/parser/parser_footnote.test.php
index 96d7a8407..d7b78cb64 100644
--- a/_test/tests/inc/parser/parser_footnote.test.php
+++ b/_test/tests/inc/parser/parser_footnote.test.php
@@ -16,7 +16,7 @@ require_once 'parser.inc.php';
 
 class TestOfDoku_Parser_Footnote extends TestOfDoku_Parser {
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         $this->P->addMode('footnote',new Footnote());
     }
diff --git a/_test/tests/inc/parser/parser_quotes.test.php b/_test/tests/inc/parser/parser_quotes.test.php
index fb192d21f..73291c201 100644
--- a/_test/tests/inc/parser/parser_quotes.test.php
+++ b/_test/tests/inc/parser/parser_quotes.test.php
@@ -6,7 +6,7 @@ require_once 'parser.inc.php';
 
 class TestOfDoku_Parser_Quotes extends TestOfDoku_Parser {
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         global $conf;
         $conf['typography'] = 2;
diff --git a/_test/tests/inc/parser/renderer_metadata.test.php b/_test/tests/inc/parser/renderer_metadata.test.php
index 5498d6f1f..cdfe31689 100644
--- a/_test/tests/inc/parser/renderer_metadata.test.php
+++ b/_test/tests/inc/parser/renderer_metadata.test.php
@@ -12,12 +12,12 @@ class renderer_metadata_test extends DokuWikiTest {
      *
      * @throws Exception
      */
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         $this->R = new Doku_Renderer_metadata();
     }
 
-    function tearDown() {
+    function tearDown() : void {
         unset($this->R);
     }
 
diff --git a/_test/tests/inc/parser/renderer_xhtml.test.php b/_test/tests/inc/parser/renderer_xhtml.test.php
index 9b635c604..44fe48854 100644
--- a/_test/tests/inc/parser/renderer_xhtml.test.php
+++ b/_test/tests/inc/parser/renderer_xhtml.test.php
@@ -14,12 +14,12 @@ class renderer_xhtml_test extends DokuWikiTest {
      *
      * @throws Exception
      */
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         $this->R = new Doku_Renderer_xhtml();
     }
 
-    function tearDown() {
+    function tearDown() : void {
         unset($this->R);
     }
 
diff --git a/_test/tests/inc/remote.test.php b/_test/tests/inc/remote.test.php
index 7f1ec4aff..8dc1d5fb0 100644
--- a/_test/tests/inc/remote.test.php
+++ b/_test/tests/inc/remote.test.php
@@ -135,7 +135,7 @@ class remote_test extends DokuWikiTest {
     /** @var  Api */
     protected $remote;
 
-    function setUp() {
+    function setUp() : void {
         parent::setUp();
         global $plugin_controller;
         global $conf;
@@ -168,7 +168,7 @@ class remote_test extends DokuWikiTest {
         $auth = new AuthPlugin();
     }
 
-    function tearDown() {
+    function tearDown() : void {
         global $USERINFO;
         $USERINFO = $this->userinfo;
 
diff --git a/_test/tests/inc/remoteapicore.test.php b/_test/tests/inc/remoteapicore.test.php
index e152d4ac5..06b0d92c6 100644
--- a/_test/tests/inc/remoteapicore.test.php
+++ b/_test/tests/inc/remoteapicore.test.php
@@ -15,7 +15,7 @@ class remoteapicore_test extends DokuWikiTest {
     /** @var  Api */
     protected $remote;
 
-    public function setUp() {
+    public function setUp() : void {
         // we need a clean setup before each single test:
         DokuWikiTest::setUpBeforeClass();
 
@@ -35,7 +35,7 @@ class remoteapicore_test extends DokuWikiTest {
         $this->remote = new Api();
     }
 
-    public function tearDown() {
+    public function tearDown() : void {
         parent::tearDown();
 
         global $USERINFO;
diff --git a/_test/tests/inc/remoteapicore_aclcheck.test.php b/_test/tests/inc/remoteapicore_aclcheck.test.php
index 6ba7f1dcf..1e34b5427 100644
--- a/_test/tests/inc/remoteapicore_aclcheck.test.php
+++ b/_test/tests/inc/remoteapicore_aclcheck.test.php
@@ -21,7 +21,7 @@ class remoteapicore_aclcheck_test extends DokuWikiTest {
         $auth = new auth_plugin_authplain();
     }
 
-    public function setUp() {
+    public function setUp() : void {
         global $config_cascade;
         global $conf;
         global $USERINFO;
@@ -44,7 +44,7 @@ class remoteapicore_aclcheck_test extends DokuWikiTest {
 
     }
 
-    public function tearDown() {
+    public function tearDown() : void {
         global $USERINFO;
         global $AUTH_ACL;
         global $config_cascade;
diff --git a/_test/tests/inc/sort_without_collator.test.php b/_test/tests/inc/sort_without_collator.test.php
index e64cfb69e..f882a67e8 100644
--- a/_test/tests/inc/sort_without_collator.test.php
+++ b/_test/tests/inc/sort_without_collator.test.php
@@ -15,7 +15,7 @@ class sort_without_collator_test extends sort_with_collator_test
     /**
      * Disable the "intl" extension.
      */
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass() : void
     {
         parent::setUpBeforeClass();
         Sort::useIntl(false);
@@ -24,7 +24,7 @@ class sort_without_collator_test extends sort_with_collator_test
     /**
      * Reenable the "intl" extension.
      */
-    public static function tearDownAfterClass()
+    public static function tearDownAfterClass() : void
     {
         Sort::useIntl(true);
         parent::tearDownAfterClass();
diff --git a/_test/tests/inc/template_tpl_get_action.php b/_test/tests/inc/template_tpl_get_action.php
index b18fe552d..1fc3bcbf2 100644
--- a/_test/tests/inc/template_tpl_get_action.php
+++ b/_test/tests/inc/template_tpl_get_action.php
@@ -2,7 +2,7 @@
 
 class template_tpl_get_action_test extends DokuWikiTest {
 
-    public function setUp() {
+    public function setUp() : void {
         parent::setUp();
         global $ID;
         $ID = 'start'; // run all tests on the start page
diff --git a/_test/tests/lib/exe/css_at_import_less.test.php b/_test/tests/lib/exe/css_at_import_less.test.php
index 759272ebf..9eaab33d6 100644
--- a/_test/tests/lib/exe/css_at_import_less.test.php
+++ b/_test/tests/lib/exe/css_at_import_less.test.php
@@ -80,7 +80,7 @@ content: @foo;';
         $this->csstest($in_css, $expected_css, $expected_less);
     }
 
-    public function tearDown() {
+    public function tearDown() : void {
         unlink($this->file);
         unlink($this->import);
         unset($this->file, $this->import);
diff --git a/_test/tests/lib/exe/css_css_loadfile.test.php b/_test/tests/lib/exe/css_css_loadfile.test.php
index 2b9d1fd2a..5c8af93ae 100644
--- a/_test/tests/lib/exe/css_css_loadfile.test.php
+++ b/_test/tests/lib/exe/css_css_loadfile.test.php
@@ -6,7 +6,7 @@ class css_css_loadfile_test extends DokuWikiTest {
 
     protected $file = '';
 
-    public function setUp() {
+    public function setUp() : void {
         $this->file = tempnam(TMP_DIR, 'css');
     }
 
@@ -90,7 +90,7 @@ class css_css_loadfile_test extends DokuWikiTest {
         }
     }
 
-    public function tearDown() {
+    public function tearDown() : void {
         unlink($this->file);
         unset($this->file);
     }
diff --git a/_test/tests/lib/exe/fetch_imagetoken.test.php b/_test/tests/lib/exe/fetch_imagetoken.test.php
index 99e642557..c3371ca71 100644
--- a/_test/tests/lib/exe/fetch_imagetoken.test.php
+++ b/_test/tests/lib/exe/fetch_imagetoken.test.php
@@ -1,12 +1,12 @@
 <?php
 
 class fetch_imagetoken_test extends DokuWikiTest {
- 
+
     private $media = 'wiki:dokuwiki-128.png';
     private $width = 200;
     private $height = 0;
 
-    function setUp() {
+    function setUp() : void {
         // check we can carry out these tests
         if (!file_exists(mediaFN($this->media))) {
             $this->markTestSkipped('Source image required for test');
diff --git a/_test/tests/lib/exe/fetch_statuscodes_external.test.php b/_test/tests/lib/exe/fetch_statuscodes_external.test.php
index 79a45ec93..09b09b3ce 100644
--- a/_test/tests/lib/exe/fetch_statuscodes_external.test.php
+++ b/_test/tests/lib/exe/fetch_statuscodes_external.test.php
@@ -9,7 +9,7 @@ class fetch_statuscodes_external_test extends DokuWikiTest {
     private $width = 200;
     private $height = 0;
 
-    function setUp() {
+    function setUp() : void {
 
         header('X-Test: check headers working');
         $header_check = function_exists('xdebug_get_headers') ? xdebug_get_headers() : headers_list();
diff --git a/_test/tests/test/plugins.test.php b/_test/tests/test/plugins.test.php
index ac6d1ee45..03f3c526e 100644
--- a/_test/tests/test/plugins.test.php
+++ b/_test/tests/test/plugins.test.php
@@ -5,7 +5,7 @@
  */
 class InttestsPluginsTest extends DokuWikiTest {
 
-    function setUp() {
+    function setUp() : void {
         $this->pluginsEnabled = array(
             'testing'
         );
diff --git a/lib/plugins/authpdo/_test/mysql.test.php b/lib/plugins/authpdo/_test/mysql.test.php
index 8cd14189b..35a76baf5 100644
--- a/lib/plugins/authpdo/_test/mysql.test.php
+++ b/lib/plugins/authpdo/_test/mysql.test.php
@@ -15,7 +15,7 @@ class mysql_plugin_authpdo_test extends DokuWikiTest {
     protected $pass = '';
     protected $port = '';
 
-    public function setUp() {
+    public function setUp() : void {
         parent::setUp();
         $configuration = DOKU_UNITTEST . "{$this->driver}.conf.php";
         if(!file_exists($configuration)) {
@@ -34,7 +34,7 @@ class mysql_plugin_authpdo_test extends DokuWikiTest {
      *
      * it might still be there if something went wrong
      */
-    public function tearDown() {
+    public function tearDown() : void {
         parent::tearDown();
         $this->dropDatabase();
     }
diff --git a/lib/plugins/authpdo/_test/sqlite.test.php b/lib/plugins/authpdo/_test/sqlite.test.php
index 89cc9f60d..58fcadcb8 100644
--- a/lib/plugins/authpdo/_test/sqlite.test.php
+++ b/lib/plugins/authpdo/_test/sqlite.test.php
@@ -36,7 +36,7 @@ class sqlite_plugin_authpdo_test extends DokuWikiTest {
         $this->assertTrue(true); // avoid being marked as risky for having no assertion
     }
 
-    public function setUp() {
+    public function setUp() : void {
         parent::setUp();
         $this->dbfile = tempnam('/tmp/', 'pluginpdo_test_');
         copy(__DIR__ . '/test.sqlite3', $this->dbfile);
@@ -85,7 +85,7 @@ class sqlite_plugin_authpdo_test extends DokuWikiTest {
         $conf['plugin']['authpdo']['leave-group'] = 'DELETE FROM member WHERE uid = :uid AND gid = :gid';
     }
 
-    public function tearDown() {
+    public function tearDown() : void {
         parent::tearDown();
         unlink($this->dbfile);
     }
diff --git a/lib/plugins/authplain/_test/escaping.test.php b/lib/plugins/authplain/_test/escaping.test.php
index be4d06b4e..58f1025d7 100644
--- a/lib/plugins/authplain/_test/escaping.test.php
+++ b/lib/plugins/authplain/_test/escaping.test.php
@@ -24,7 +24,7 @@ class helper_plugin_authplain_escaping_test extends DokuWikiTest {
         $this->auth = new auth_plugin_authplainharness();
     }
 
-    function setUp() {
+    function setUp() : void {
         global $config_cascade;
         parent::setUp();
         $name = $config_cascade['plainauth.users']['default'];
@@ -32,7 +32,7 @@ class helper_plugin_authplain_escaping_test extends DokuWikiTest {
         $this->reloadUsers();
     }
 
-    function tearDown() {
+    function tearDown() : void {
         global $config_cascade;
         parent::tearDown();
         $name = $config_cascade['plainauth.users']['default'];
diff --git a/lib/plugins/authplain/_test/userdata.test.php b/lib/plugins/authplain/_test/userdata.test.php
index b80b39349..9460c1919 100644
--- a/lib/plugins/authplain/_test/userdata.test.php
+++ b/lib/plugins/authplain/_test/userdata.test.php
@@ -16,7 +16,7 @@ class userdata_test extends DokuWikiTest
      * Load auth with test conf
      * @throws Exception
      */
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp();
         global $config_cascade;
diff --git a/lib/plugins/config/_test/Setting/AbstractSettingTest.php b/lib/plugins/config/_test/Setting/AbstractSettingTest.php
index d18f0ec17..55e53c4fe 100644
--- a/lib/plugins/config/_test/Setting/AbstractSettingTest.php
+++ b/lib/plugins/config/_test/Setting/AbstractSettingTest.php
@@ -13,7 +13,7 @@ abstract class AbstractSettingTest extends \DokuWikiTest {
      * Sets up the proper class to test based on the test's class name
      * @throws \Exception
      */
-    public function setUp() {
+    public function setUp() : void {
         parent::setUp();
         $class = get_class($this);
         $class = substr($class, strrpos($class, '\\') + 1, -4);
diff --git a/lib/plugins/testing/_test/dummy_plugin_integration_test.test.php b/lib/plugins/testing/_test/dummy_plugin_integration_test.test.php
index 5982c6933..f8054755c 100644
--- a/lib/plugins/testing/_test/dummy_plugin_integration_test.test.php
+++ b/lib/plugins/testing/_test/dummy_plugin_integration_test.test.php
@@ -5,7 +5,7 @@
  */
 class TestingDummyPluginIntegrationTest extends DokuWikiTest {
 
-    function setUp() {
+    function setUp() : void {
         $this->pluginsEnabled = array(
             'testing'
         );
diff --git a/lib/plugins/usermanager/_test/csv_export.test.php b/lib/plugins/usermanager/_test/csv_export.test.php
index 667fc71dc..96f9eb28c 100644
--- a/lib/plugins/usermanager/_test/csv_export.test.php
+++ b/lib/plugins/usermanager/_test/csv_export.test.php
@@ -12,7 +12,7 @@ class plugin_usermanager_csv_export_test extends DokuWikiTest {
 
     protected  $usermanager;
 
-    function setUp() {
+    function setUp() : void {
         $this->usermanager = new admin_mock_usermanager();
         parent::setUp();
     }
diff --git a/lib/plugins/usermanager/_test/csv_import.test.php b/lib/plugins/usermanager/_test/csv_import.test.php
index 13034a012..9cf23eb8d 100644
--- a/lib/plugins/usermanager/_test/csv_import.test.php
+++ b/lib/plugins/usermanager/_test/csv_import.test.php
@@ -20,7 +20,7 @@ class plugin_usermanager_csv_import_test extends DokuWikiTest
     protected $usermanager;
     protected $importfile;
 
-    public function setUp()
+    public function setUp() : void
     {
         $this->importfile = tempnam(TMP_DIR, 'csv');
 
@@ -39,7 +39,7 @@ class plugin_usermanager_csv_import_test extends DokuWikiTest
         parent::setUp();
     }
 
-    public function tearDown()
+    public function tearDown() : void
     {
         $_FILES = $this->old_files;
         parent::tearDown();