diff --git a/typo3/sysext/core/Tests/Unit/Log/Writer/FileWriterTest.php b/typo3/sysext/core/Tests/Unit/Log/Writer/FileWriterTest.php
index dd5882a4b2dcb66cb5276da266f3b8d17d8e6a5c..da1fc224d386d06736807bb09cc9b9252d6b6caa 100644
--- a/typo3/sysext/core/Tests/Unit/Log/Writer/FileWriterTest.php
+++ b/typo3/sysext/core/Tests/Unit/Log/Writer/FileWriterTest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace TYPO3\CMS\Core\Tests\Unit\Log\Writer;
 
 /*
@@ -16,17 +17,18 @@ namespace TYPO3\CMS\Core\Tests\Unit\Log\Writer;
 
 use org\bovigo\vfs\vfsStream;
 use org\bovigo\vfs\vfsStreamWrapper;
+use TYPO3\CMS\Core\Log\Logger;
+use TYPO3\CMS\Core\Log\LogManager;
+use TYPO3\CMS\Core\Log\LogRecord;
+use TYPO3\CMS\Core\Log\Writer\FileWriter;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
 
 /**
  * Test case
  */
-class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
+class FileWriterTest extends UnitTestCase
 {
-    /**
-     * Subject is not notice free, disable E_NOTICES
-     */
-    protected static $suppressNotices = true;
-
     /**
      * @var string
      */
@@ -37,7 +39,7 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
      */
     protected $logFileName = 'test.log';
 
-    protected function setUpVfsStream()
+    protected function setUpVfsStream(): void
     {
         if (!class_exists('org\\bovigo\\vfs\\vfsStream')) {
             $this->markTestSkipped('File backend tests are not available with this phpunit version.');
@@ -50,16 +52,16 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
      *
      * @param string $name
      * @internal param string $component Component key
-     * @return \TYPO3\CMS\Core\Log\Logger
+     * @return Logger
      */
-    protected function createLogger($name = '')
+    protected function createLogger($name = ''): Logger
     {
         if (empty($name)) {
             $name = $this->getUniqueId('test.core.log.');
         }
-        \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Log\LogManager::class)->registerLogger($name);
-        /** @var \TYPO3\CMS\Core\Log\Logger $logger */
-        $logger = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Log\LogManager::class)->getLogger($name);
+        GeneralUtility::makeInstance(LogManager::class)->registerLogger($name);
+        /** @var Logger $logger */
+        $logger = GeneralUtility::makeInstance(LogManager::class)->getLogger($name);
         return $logger;
     }
 
@@ -67,18 +69,18 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
      * Creates a file writer
      *
      * @param string $prependName
-     * @return \TYPO3\CMS\Core\Log\Writer\FileWriter
+     * @return FileWriter
      */
-    protected function createWriter($prependName = '')
+    protected function createWriter($prependName = ''): FileWriter
     {
-        /** @var \TYPO3\CMS\Core\Log\Writer\FileWriter $writer */
-        $writer = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Log\Writer\FileWriter::class, [
+        /** @var FileWriter $writer */
+        $writer = GeneralUtility::makeInstance(FileWriter::class, [
             'logFile' => $this->getDefaultFileName($prependName)
         ]);
         return $writer;
     }
 
-    protected function getDefaultFileName($prependName = '')
+    protected function getDefaultFileName($prependName = ''): string
     {
         return 'vfs://LogRoot/' . $this->logFileDirectory . '/' . $prependName . $this->logFileName;
     }
@@ -86,11 +88,11 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
     /**
      * @test
      */
-    public function setLogFileSetsLogFile()
+    public function setLogFileSetsLogFile(): void
     {
         $this->setUpVfsStream();
         vfsStream::newFile($this->logFileName)->at(vfsStreamWrapper::getRoot());
-        $writer = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Log\Writer\FileWriter::class);
+        $writer = GeneralUtility::makeInstance(FileWriter::class);
         $writer->setLogFile($this->getDefaultFileName());
         $this->assertAttributeEquals($this->getDefaultFileName(), 'logFile', $writer);
     }
@@ -98,9 +100,9 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
     /**
      * @test
      */
-    public function setLogFileAcceptsAbsolutePath()
+    public function setLogFileAcceptsAbsolutePath(): void
     {
-        $writer = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Log\Writer\FileWriter::class);
+        $writer = GeneralUtility::makeInstance(FileWriter::class);
         $tempFile = rtrim(sys_get_temp_dir(), '/\\') . '/typo3.log';
         $writer->setLogFile($tempFile);
         $this->assertAttributeEquals($tempFile, 'logFile', $writer);
@@ -109,7 +111,7 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
     /**
      * @test
      */
-    public function createsLogFileDirectory()
+    public function createsLogFileDirectory(): void
     {
         $this->setUpVfsStream();
         $this->createWriter();
@@ -119,7 +121,7 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
     /**
      * @test
      */
-    public function createsLogFile()
+    public function createsLogFile(): void
     {
         $this->setUpVfsStream();
         $this->createWriter();
@@ -129,10 +131,10 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
     /**
      * @return array
      */
-    public function logsToFileDataProvider()
+    public function logsToFileDataProvider(): array
     {
-        $simpleRecord = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Log\LogRecord::class, $this->getUniqueId('test.core.log.fileWriter.simpleRecord.'), \TYPO3\CMS\Core\Log\LogLevel::INFO, 'test record');
-        $recordWithData = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Log\LogRecord::class, $this->getUniqueId('test.core.log.fileWriter.recordWithData.'), \TYPO3\CMS\Core\Log\LogLevel::ALERT, 'test record with data', ['foo' => ['bar' => 'baz']]);
+        $simpleRecord = GeneralUtility::makeInstance(LogRecord::class, $this->getUniqueId('test.core.log.fileWriter.simpleRecord.'), \TYPO3\CMS\Core\Log\LogLevel::INFO, 'test record');
+        $recordWithData = GeneralUtility::makeInstance(LogRecord::class, $this->getUniqueId('test.core.log.fileWriter.recordWithData.'), \TYPO3\CMS\Core\Log\LogLevel::ALERT, 'test record with data', ['foo' => ['bar' => 'baz']]);
         return [
             'simple record' => [$simpleRecord, trim((string)$simpleRecord)],
             'record with data' => [$recordWithData, trim((string)$recordWithData)]
@@ -141,11 +143,11 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
 
     /**
      * @test
-     * @param \TYPO3\CMS\Core\Log\LogRecord $record Record Test Data
+     * @param LogRecord $record Record Test Data
      * @param string $expectedResult Needle
      * @dataProvider logsToFileDataProvider
      */
-    public function logsToFile(\TYPO3\CMS\Core\Log\LogRecord $record, $expectedResult)
+    public function logsToFile(LogRecord $record, $expectedResult): void
     {
         $this->setUpVfsStream();
         $this->createWriter()->writeLog($record);
@@ -155,11 +157,11 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
 
     /**
      * @test
-     * @param \TYPO3\CMS\Core\Log\LogRecord $record Record Test Data
+     * @param LogRecord $record Record Test Data
      * @param string $expectedResult Needle
      * @dataProvider logsToFileDataProvider
      */
-    public function differentWritersLogToDifferentFiles(\TYPO3\CMS\Core\Log\LogRecord $record, $expectedResult)
+    public function differentWritersLogToDifferentFiles(LogRecord $record, $expectedResult): void
     {
         $this->setUpVfsStream();
         $firstWriter = $this->createWriter();
@@ -182,10 +184,10 @@ class FileWriterTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
     {
         $this->setUpVfsStream();
 
-        $firstWriter = $this->getMockBuilder(\TYPO3\CMS\Core\Log\Writer\FileWriter::class)
+        $firstWriter = $this->getMockBuilder(FileWriter::class)
             ->setMethods(['dummy'])
             ->getMock();
-        $secondWriter = $this->getMockBuilder(\TYPO3\CMS\Core\Log\Writer\FileWriter::class)
+        $secondWriter = $this->getMockBuilder(FileWriter::class)
             ->setMethods(['createLogFile'])
             ->getMock();