diff --git a/.gitignore b/.gitignore
index cd51ed9..1f1aa01 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,7 @@ composer.phar
 .phpunit.cache
 /tests/.results/
 .DS_Store
-*.local
\ No newline at end of file
+*.local
+
+.claude
+.cursor
diff --git a/Kununu/CsFixer/Command/CsFixerGitHookCommand.php b/Kununu/CsFixer/Command/CsFixerGitHookCommand.php
index 6d2b92c..2ef8db3 100644
--- a/Kununu/CsFixer/Command/CsFixerGitHookCommand.php
+++ b/Kununu/CsFixer/Command/CsFixerGitHookCommand.php
@@ -80,21 +80,21 @@ private function installHook(string $gitPath): void
         $sourceHook = __DIR__ . '/../Hooks/git-pre-commit';
         $destHook = $hooksDir . '/pre-commit';
 
-        if (!is_dir($hooksDir) && !mkdir($hooksDir, 0777, true) && !is_dir($hooksDir)) {
+        if (!is_dir($hooksDir) && !@mkdir($hooksDir, 0777, true) && !is_dir($hooksDir)) {
             throw new RuntimeException(sprintf(
                 'Could not create hooks directory: "%s".',
                 $hooksDir
             ));
         }
 
-        if (file_exists($destHook) && !unlink($destHook)) {
+        if (file_exists($destHook) && !@unlink($destHook)) {
             throw new RuntimeException(sprintf(
                 'Could not remove existing hook at "%s".',
                 $destHook
             ));
         }
 
-        if (!copy($sourceHook, $destHook)) {
+        if (!@copy($sourceHook, $destHook)) {
             throw new RuntimeException(sprintf(
                 'Failed to copy hook from "%s" to "%s".',
                 $sourceHook,
@@ -102,7 +102,7 @@ private function installHook(string $gitPath): void
             ));
         }
 
-        if (!chmod($destHook, 0755)) {
+        if (!@chmod($destHook, 0755)) {
             throw new RuntimeException(sprintf(
                 'Failed to make hook executable at "%s".',
                 $destHook
@@ -151,7 +151,7 @@ private function ensureSymlinkRelative(string $target, string $linkPath): void
     {
         $linkDir = dirname($linkPath);
 
-        if (!is_dir($linkDir) && !mkdir($linkDir, 0777, true) && !is_dir($linkDir)) {
+        if (!is_dir($linkDir) && !@mkdir($linkDir, 0777, true) && !is_dir($linkDir)) {
             throw new RuntimeException(sprintf(
                 'Could not create directory for symlink: "%s".',
                 $linkDir
@@ -164,7 +164,7 @@ private function ensureSymlinkRelative(string $target, string $linkPath): void
 
         $relativeTarget = $this->makeRelativePath($linkDir, $target);
 
-        if (!symlink($relativeTarget, $linkPath)) {
+        if (!@symlink($relativeTarget, $linkPath)) {
             throw new RuntimeException(sprintf(
                 'Failed to create symlink from "%s" to "%s".',
                 $linkPath,
diff --git a/tests/Unit/Kununu/CsFixer/Command/CsFixerCommandTest.php b/tests/Unit/Kununu/CsFixer/Command/CsFixerCommandTest.php
index c947139..9ff7456 100644
--- a/tests/Unit/Kununu/CsFixer/Command/CsFixerCommandTest.php
+++ b/tests/Unit/Kununu/CsFixer/Command/CsFixerCommandTest.php
@@ -121,6 +121,28 @@ public function testCsFixerCommandReturnsFailureWhenConfigNotFound(): void
         self::assertSame(CsFixerCommand::FAILURE, $exitCode);
     }
 
+    public function testCsFixerCommandReturnsFailureWhenProcessFails(): void
+    {
+        $this->tempFile = sys_get_temp_dir() . '/csfixer_' . uniqid('', true) . '.php';
+        file_put_contents($this->tempFile, "<?php\ndeclare(strict_types=1);\n");
+
+        $application = new Application();
+        $command = new CsFixerCommand();
+        method_exists($application, 'addCommand')
+            ? $application->addCommand($command)
+            : $application->add($command);
+
+        $command = $application->find('kununu:cs-fixer');
+        $tester = new CommandTester($command);
+
+        $exitCode = $tester->execute([
+            'files'        => [$this->tempFile],
+            '--extra-args' => ['--invalid-flag-xyz'],
+        ]);
+
+        self::assertSame(CsFixerCommand::FAILURE, $exitCode);
+    }
+
     protected function tearDown(): void
     {
         if ($this->tempFile !== null && is_file($this->tempFile)) {
diff --git a/tests/Unit/Kununu/CsFixer/Command/CsFixerGitHookCommandTest.php b/tests/Unit/Kununu/CsFixer/Command/CsFixerGitHookCommandTest.php
index 9a2b069..53930c4 100644
--- a/tests/Unit/Kununu/CsFixer/Command/CsFixerGitHookCommandTest.php
+++ b/tests/Unit/Kununu/CsFixer/Command/CsFixerGitHookCommandTest.php
@@ -79,6 +79,126 @@ public function testInstallsHookSuccessfully(): void
         self::assertTrue(is_link($symlinkBin), 'php-cs-fixer symlink should exist');
     }
 
+    public function testReinstallRemovesExistingHookAndSymlinks(): void
+    {
+        chdir($this->repoDir);
+        exec('git init 2>/dev/null');
+
+        $vendorBase = $this->baseDir . '/vendor';
+        $codeToolsDir = $vendorBase . '/kununu/code-tools';
+        $binDir = $vendorBase . '/bin';
+        mkdir($codeToolsDir, 0777, true);
+        mkdir($binDir, 0777, true);
+        file_put_contents($codeToolsDir . '/php-cs-fixer.php', "<?php\n// stub\n");
+        file_put_contents($binDir . '/php-cs-fixer', "#!/usr/bin/env php\n<?php\n");
+        @chmod($binDir . '/php-cs-fixer', 0755);
+
+        $app = new Application();
+        $command = new CsFixerGitHookCommand();
+        method_exists($app, 'addCommand')
+            ? $app->addCommand($command)
+            : $app->add($command);
+
+        $command = $app->find('kununu:cs-fixer-git-hook');
+        $tester = new CommandTester($command);
+
+        $tester->execute([]);
+
+        $exitCode = $tester->execute([]);
+
+        self::assertSame(CsFixerGitHookCommand::SUCCESS, $exitCode);
+        self::assertFileExists($this->repoDir . '/.git/hooks/pre-commit');
+        self::assertTrue(is_link($this->repoDir . '/.git/kununu/.php-cs-fixer.php'));
+        self::assertTrue(is_link($this->repoDir . '/.git/kununu/php-cs-fixer'));
+    }
+
+    public function testFailsWhenGitPathIsNotDirectory(): void
+    {
+        $mainRepo = $this->baseDir . '/main';
+        mkdir($mainRepo, 0777, true);
+        chdir($mainRepo);
+        exec('git init 2>/dev/null');
+
+        file_put_contents(
+            $this->repoDir . '/.git',
+            'gitdir: ' . $mainRepo . '/.git' . "\n"
+        );
+
+        chdir($this->repoDir);
+
+        $tester = $this->createCommandTester();
+
+        $exitCode = $tester->execute([]);
+
+        self::assertSame(CsFixerGitHookCommand::FAILURE, $exitCode);
+        self::assertStringContainsString('.git directory not found', $tester->getDisplay());
+    }
+
+    public function testFailsWhenHooksDirCannotBeCreated(): void
+    {
+        chdir($this->repoDir);
+        exec('git init 2>/dev/null');
+        exec('rm -rf ' . escapeshellarg($this->repoDir . '/.git/hooks'));
+        chmod($this->repoDir . '/.git', 0555);
+
+        $tester = $this->createCommandTester();
+
+        $exitCode = $tester->execute([]);
+
+        chmod($this->repoDir . '/.git', 0755);
+
+        self::assertSame(CsFixerGitHookCommand::FAILURE, $exitCode);
+        self::assertStringContainsString('Could not create hooks directory', $tester->getDisplay());
+    }
+
+    public function testFailsWhenHookCopyFails(): void
+    {
+        chdir($this->repoDir);
+        exec('git init 2>/dev/null');
+        chmod($this->repoDir . '/.git/hooks', 0555);
+
+        $tester = $this->createCommandTester();
+
+        $exitCode = $tester->execute([]);
+
+        chmod($this->repoDir . '/.git/hooks', 0755);
+
+        self::assertSame(CsFixerGitHookCommand::FAILURE, $exitCode);
+        self::assertStringContainsString('Failed to copy hook', $tester->getDisplay());
+    }
+
+    public function testFailsWhenExistingHookCannotBeRemoved(): void
+    {
+        chdir($this->repoDir);
+        exec('git init 2>/dev/null');
+
+        $hooksDir = $this->repoDir . '/.git/hooks';
+        file_put_contents($hooksDir . '/pre-commit', '#!/bin/sh');
+        chmod($hooksDir, 0555);
+
+        $tester = $this->createCommandTester();
+
+        $exitCode = $tester->execute([]);
+
+        chmod($hooksDir, 0755);
+
+        self::assertSame(CsFixerGitHookCommand::FAILURE, $exitCode);
+        self::assertStringContainsString('Could not remove existing hook', $tester->getDisplay());
+    }
+
+    public function testFailsWhenVendorDirNotFound(): void
+    {
+        chdir($this->repoDir);
+        exec('git init 2>/dev/null');
+
+        $tester = $this->createCommandTester();
+
+        $exitCode = $tester->execute([]);
+
+        self::assertSame(CsFixerGitHookCommand::FAILURE, $exitCode);
+        self::assertStringContainsString('Could not find vendor directory', $tester->getDisplay());
+    }
+
     protected function setUp(): void
     {
         parent::setUp();
@@ -95,8 +215,20 @@ protected function tearDown(): void
     {
         chdir($this->oldCwd);
         if (is_dir($this->baseDir)) {
+            exec('chmod -R 755 ' . escapeshellarg($this->baseDir) . ' 2>/dev/null');
             exec('rm -rf ' . escapeshellarg($this->baseDir));
         }
         parent::tearDown();
     }
+
+    private function createCommandTester(): CommandTester
+    {
+        $app = new Application();
+        $command = new CsFixerGitHookCommand();
+        method_exists($app, 'addCommand')
+            ? $app->addCommand($command)
+            : $app->add($command);
+
+        return new CommandTester($app->find('kununu:cs-fixer-git-hook'));
+    }
 }
diff --git a/tests/Unit/Kununu/Sniffs/Classes/EmptyLineAfterClassElementsSniffTest.php b/tests/Unit/Kununu/Sniffs/Classes/EmptyLineAfterClassElementsSniffTest.php
index 13a9be3..8c40258 100644
--- a/tests/Unit/Kununu/Sniffs/Classes/EmptyLineAfterClassElementsSniffTest.php
+++ b/tests/Unit/Kununu/Sniffs/Classes/EmptyLineAfterClassElementsSniffTest.php
@@ -10,7 +10,7 @@ class EmptyLineAfterClassElementsSniffTest extends SniffTestCase
 {
     public function testEmptyLineAfterClassElementsSniffer(): void
     {
-        $this->assertSnifferFindsFixableErrors(new EmptyLineAfterClassElementsSniff(), 2, 2);
+        $this->assertSnifferFindsFixableErrors(new EmptyLineAfterClassElementsSniff(), 4, 4);
     }
 
     public function testEmptyLineAfterClassElementsFixer(): void
diff --git a/tests/Unit/Kununu/Sniffs/Files/LineLengthSniffTest.php b/tests/Unit/Kununu/Sniffs/Files/LineLengthSniffTest.php
index d91b069..a86e0ad 100644
--- a/tests/Unit/Kununu/Sniffs/Files/LineLengthSniffTest.php
+++ b/tests/Unit/Kununu/Sniffs/Files/LineLengthSniffTest.php
@@ -10,6 +10,14 @@ class LineLengthSniffTest extends SniffTestCase
 {
     public function testMethodSignatureArgumentsSniffer(): void
     {
-        $this->assertSnifferFindsErrors(new LineLengthSniff(), 3);
+        $this->assertSnifferFindsErrors(new LineLengthSniff(), 4);
+    }
+
+    public function testIgnoreUseStatementsCoversUseBranch(): void
+    {
+        $sniff = new LineLengthSniff();
+        $sniff->ignoreUseStatements = true;
+
+        $this->assertSnifferFindsErrors($sniff, 4);
     }
 }
diff --git a/tests/_data/EmptyLineAfterClassElements/after/Fixme.php b/tests/_data/EmptyLineAfterClassElements/after/Fixme.php
index 24dffa6..b067223 100644
--- a/tests/_data/EmptyLineAfterClassElements/after/Fixme.php
+++ b/tests/_data/EmptyLineAfterClassElements/after/Fixme.php
@@ -28,3 +28,40 @@ public function someMethod(): void
         $this->propertyOne = 'value';
     }
 }
+
+class ExtraBlankAfterConst
+{
+    public const string A = 'a';
+
+
+public function doSomething(): void
+    {
+    }
+}
+
+class ExtraBlankAfterProp
+{
+    private readonly string $prop;
+
+
+public function doSomething(): void
+    {
+    }
+}
+
+class PropertyThenClose
+{
+    protected string $onlyProperty;
+}
+
+class ConstantThenClose
+{
+    public const string ONLY = 'only';
+}
+
+class NoPropertiesOrConstants
+{
+    public function firstMethod(): void
+    {
+    }
+}
diff --git a/tests/_data/EmptyLineAfterClassElements/before/Fixme.php b/tests/_data/EmptyLineAfterClassElements/before/Fixme.php
index e9818f2..2d6f387 100644
--- a/tests/_data/EmptyLineAfterClassElements/before/Fixme.php
+++ b/tests/_data/EmptyLineAfterClassElements/before/Fixme.php
@@ -26,3 +26,42 @@ public function someMethod(): void
         $this->propertyOne = 'value';
     }
 }
+
+class ExtraBlankAfterConst
+{
+    public const string A = 'a';
+
+
+
+    public function doSomething(): void
+    {
+    }
+}
+
+class ExtraBlankAfterProp
+{
+    private readonly string $prop;
+
+
+
+    public function doSomething(): void
+    {
+    }
+}
+
+class PropertyThenClose
+{
+    protected string $onlyProperty;
+}
+
+class ConstantThenClose
+{
+    public const string ONLY = 'only';
+}
+
+class NoPropertiesOrConstants
+{
+    public function firstMethod(): void
+    {
+    }
+}
diff --git a/tests/_data/LineLength/before/Fixme.php b/tests/_data/LineLength/before/Fixme.php
index f2ec99c..c73cd7f 100644
--- a/tests/_data/LineLength/before/Fixme.php
+++ b/tests/_data/LineLength/before/Fixme.php
@@ -3,6 +3,8 @@
 
 namespace Kununu;
 
+use Some\Very\Long\Namespace\Path\That\Definitely\Exceeds\The\Maximum\Line\Length\Of\One\Hundred\And\Twenty\Characters\In\Total;
+
 class Fixme
 {
     public const VERY_BIG_STRING = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam nec nisl nec nunc tincidunt tincidunt. Nullam nec nisl nec nunc tincidunt tincidunt.';
diff --git a/tests/_data/MethodSignatureArguments/after/Fixme.php b/tests/_data/MethodSignatureArguments/after/Fixme.php
index c8ae728..4b82374 100644
--- a/tests/_data/MethodSignatureArguments/after/Fixme.php
+++ b/tests/_data/MethodSignatureArguments/after/Fixme.php
@@ -15,4 +15,20 @@ public function signatureArgumentsShouldBeMultiLine(
         string $thirdArgument
     ): void {
     }
+
+    public function aReallyLongMethodNameWithNoParametersThatIsDefinitelyOverOneHundredAndTwentyCharactersForCoverage(): void
+    {
+    }
+
+    public function multilineWithFirstLineParamsAndLongEnough(string $firstParamWithLongName,
+        string $secondParamWithAlsoALongName
+    ): void {
+    }
+
+    public function multiThree(
+        int $a,
+        int $b,
+        int $c
+    ): void {
+    }
 }
diff --git a/tests/_data/MethodSignatureArguments/before/Fixme.php b/tests/_data/MethodSignatureArguments/before/Fixme.php
index 0f58659..55bc662 100644
--- a/tests/_data/MethodSignatureArguments/before/Fixme.php
+++ b/tests/_data/MethodSignatureArguments/before/Fixme.php
@@ -13,4 +13,20 @@ public function signatureArgumentsShouldBeSingleLine(
     public function signatureArgumentsShouldBeMultiLine(string $firstArgument, string $secondArgument, string $thirdArgument): void
     {
     }
+
+    public function aReallyLongMethodNameWithNoParametersThatIsDefinitelyOverOneHundredAndTwentyCharactersForCoverage(): void
+    {
+    }
+
+    public function multilineWithFirstLineParamsAndLongEnough(string $firstParamWithLongName,
+        string $secondParamWithAlsoALongName
+    ): void {
+    }
+
+    public function multiThree(
+        int $a,
+        int $b,
+        int $c
+    ): void {
+    }
 }