diff --git a/src/CodeCoverage/Generators/AbstractGenerator.php b/src/CodeCoverage/Generators/AbstractGenerator.php
index 3a0d1cb0..e40aaa34 100644
--- a/src/CodeCoverage/Generators/AbstractGenerator.php
+++ b/src/CodeCoverage/Generators/AbstractGenerator.php
@@ -107,7 +107,7 @@ protected function getSourceIterator(): \Iterator
 		return new \CallbackFilterIterator(
 			$iterator,
 			fn(\SplFileInfo $file): bool => $file->getBasename()[0] !== '.'  // . or .. or .gitignore
-				&& in_array($file->getExtension(), $this->acceptFiles, true)
+				&& in_array($file->getExtension(), $this->acceptFiles, true),
 		);
 	}
 
diff --git a/src/Framework/Assert.php b/src/Framework/Assert.php
index d8410cb6..9340fbba 100644
--- a/src/Framework/Assert.php
+++ b/src/Framework/Assert.php
@@ -36,7 +36,7 @@ class Assert
 		'%f%' => '[+-]?\.?\d+\.?\d*(?:[Ee][+-]?\d+)?', // floating point number
 		'%h%' => '[0-9a-fA-F]+', // one or more HEX digits
 		'%w%' => '[0-9a-zA-Z_]+', //one or more alphanumeric characters
-		'%ds%' => '[\\\\/]',    // directory separator
+		'%ds%' => '[\\\/]',    // directory separator
 		'%(\[.+\][+*?{},\d]*)%' => '$1', // range
 	];
 
@@ -517,7 +517,7 @@ public static function isMatching(string $pattern, string $actual, bool $strict
 			$utf8 = preg_match('#\x80-\x{10FFFF}]#u', $pattern) ? 'u' : '';
 			$suffix = ($strict ? '$#DsU' : '\s*$#sU') . $utf8;
 			$patterns = static::$patterns + [
-				'[.\\\\+*?[^$(){|\#]' => '\$0', // preg quoting
+				'[.\\\+*?[^$(){|\#]' => '\$0', // preg quoting
 				'\x00' => '\x00',
 				'[\t ]*\r?\n' => '[\t ]*\r?\n', // right trim
 			];
diff --git a/src/Framework/Dumper.php b/src/Framework/Dumper.php
index 17700edd..83d4b255 100644
--- a/src/Framework/Dumper.php
+++ b/src/Framework/Dumper.php
@@ -237,14 +237,14 @@ private static function encodeStringPhp(string $s): string
 		];
 		$utf8 = preg_match('##u', $s);
 		$escaped = preg_replace_callback(
-			$utf8 ? '#[\p{C}\\\\]#u' : '#[\x00-\x1F\x7F-\xFF\\\\]#',
+			$utf8 ? '#[\p{C}\\\]#u' : '#[\x00-\x1F\x7F-\xFF\\\]#',
 			fn($m) => $special[$m[0]] ?? (strlen($m[0]) === 1
 				? '\x' . str_pad(strtoupper(dechex(ord($m[0]))), 2, '0', STR_PAD_LEFT) . ''
 				: '\u{' . strtoupper(ltrim(dechex(self::utf8Ord($m[0])), '0')) . '}'),
 			$s,
 		);
 		return $s === str_replace('\\\\', '\\', $escaped)
-			? "'" . preg_replace('#\'|\\\\(?=[\'\\\\]|$)#D', '\\\\$0', $s) . "'"
+			? "'" . preg_replace('#\'|\\\(?=[\'\\\]|$)#D', '\\\$0', $s) . "'"
 			: '"' . addcslashes($escaped, '"$') . '"';
 	}
 
@@ -255,7 +255,7 @@ private static function encodeStringLine(string $s): string
 			"\r" => "\\r\r",
 			"\n" => "\\n\n",
 			"\t" => "\\t\t",
-			"\e" => '\\e',
+			"\e" => '\e',
 			"'" => "'",
 		];
 		$utf8 = preg_match('##u', $s);
diff --git a/src/Framework/Helpers.php b/src/Framework/Helpers.php
index 9d4c0376..0092fce8 100644
--- a/src/Framework/Helpers.php
+++ b/src/Framework/Helpers.php
@@ -20,7 +20,7 @@ class Helpers
 	 */
 	public static function purge(string $dir): void
 	{
-		if (preg_match('#^(\w:)?[/\\\\]?$#', $dir)) {
+		if (preg_match('#^(\w:)?[/\\\]?$#', $dir)) {
 			throw new \InvalidArgumentException('Directory must not be an empty string or root path.');
 		}
 
diff --git a/src/Runner/Runner.php b/src/Runner/Runner.php
index 9a768063..3a82e337 100644
--- a/src/Runner/Runner.php
+++ b/src/Runner/Runner.php
@@ -91,7 +91,7 @@ public function run(): bool
 		if ($this->tempDir) {
 			usort(
 				$this->jobs,
-				fn(Job $a, Job $b): int => $this->getLastResult($a->getTest()) - $this->getLastResult($b->getTest())
+				fn(Job $a, Job $b): int => $this->getLastResult($a->getTest()) - $this->getLastResult($b->getTest()),
 			);
 		}
 
diff --git a/tests/Framework/Assert.match.phpt b/tests/Framework/Assert.match.phpt
index d26da522..582b1717 100644
--- a/tests/Framework/Assert.match.phpt
+++ b/tests/Framework/Assert.match.phpt
@@ -40,10 +40,10 @@ $matches = [
 	['%f%', '-1e5'],
 	['%h%', 'aBcDeF01'],
 	['%w%', 'aBzZ_01'],
-	['%ds%%ds%', '\\/'],
+	['%ds%%ds%', '\/'],
 	['%[a-c]+%', 'abc'],
 	['%[]%', '%[]%'],
-	['.\\+*?[^]$(){}=!<>|:-#', '.\\+*?[^]$(){}=!<>|:-#'],
+	['.\+*?[^]$(){}=!<>|:-#', '.\+*?[^]$(){}=!<>|:-#'],
 	['~\d+~', '123'],
 	['#\d+#', '123'],
 ];
diff --git a/tests/Framework/Dumper.toPhp.phpt b/tests/Framework/Dumper.toPhp.phpt
index 364e4f7f..e0525d40 100644
--- a/tests/Framework/Dumper.toPhp.phpt
+++ b/tests/Framework/Dumper.toPhp.phpt
@@ -28,10 +28,10 @@ Assert::match('0.1', Dumper::toPhp(0.1));
 Assert::match("''", Dumper::toPhp(''));
 Assert::match("' '", Dumper::toPhp(' '));
 Assert::match("'0'", Dumper::toPhp('0'));
-Assert::match('"\\x00"', Dumper::toPhp("\x00"));
+Assert::match('"\x00"', Dumper::toPhp("\x00"));
 Assert::match('"\u{FEFF}"', Dumper::toPhp("\xEF\xBB\xBF")); // BOM
 Assert::match("'	'", Dumper::toPhp("\t"));
-Assert::match('"\\xFF"', Dumper::toPhp("\xFF"));
+Assert::match('"\xFF"', Dumper::toPhp("\xFF"));
 Assert::match('"multi\nline"', Dumper::toPhp("multi\nline"));
 Assert::match("'Iñtërnâtiônàlizætiøn'", Dumper::toPhp("I\xc3\xb1t\xc3\xabrn\xc3\xa2ti\xc3\xb4n\xc3\xa0liz\xc3\xa6ti\xc3\xb8n"));
 Assert::match(
@@ -48,8 +48,8 @@ Assert::match(
 );
 
 Assert::match('\'$"\\\\\'', Dumper::toPhp('$"\\'));
-Assert::match('\'$"\\ \x00\'', Dumper::toPhp('$"\\ \x00'));
-Assert::match('"\\$\\"\\\\ \x00"', Dumper::toPhp("$\"\\ \x00"));
+Assert::match('\'$"\ \x00\'', Dumper::toPhp('$"\ \x00'));
+Assert::match('"\$\"\\\ \x00"', Dumper::toPhp("$\"\\ \x00"));
 
 Assert::match('/* resource stream */', Dumper::toPhp(fopen(__FILE__, 'r')));
 Assert::match('(object) /* #%a% */ []', Dumper::toPhp((object) null));
diff --git a/tests/Framework/TestCase.annotationThrows.phpt b/tests/Framework/TestCase.annotationThrows.phpt
index 2b88b923..625f9556 100644
--- a/tests/Framework/TestCase.annotationThrows.phpt
+++ b/tests/Framework/TestCase.annotationThrows.phpt
@@ -96,7 +96,7 @@ class MyTest extends Tester\TestCase
 
 
 	/**
-	 * @dataprovider dataProvider
+	 * @dataProvider dataProvider
 	 * @throws Exception
 	 */
 	public function testThrowsWithDataprovider($x)