diff --git a/Consistence/ruleset.xml b/Consistence/ruleset.xml
index c832dc1..1d9d466 100644
--- a/Consistence/ruleset.xml
+++ b/Consistence/ruleset.xml
@@ -88,8 +88,12 @@
 	<rule ref="SlevomatCodingStandard.ControlStructures.NewWithParentheses"/>
 	<rule ref="SlevomatCodingStandard.Exceptions.DeadCatch"/>
 	<rule ref="SlevomatCodingStandard.Exceptions.ReferenceThrowableOnly"/>
+	<rule ref="SlevomatCodingStandard.Functions.StaticClosure"/>
+	<rule ref="SlevomatCodingStandard.Functions.UnusedInheritedVariablePassedToClosure"/>
 	<rule ref="SlevomatCodingStandard.PHP.ShortList"/>
 	<rule ref="SlevomatCodingStandard.PHP.TypeCast"/>
+	<rule ref="SlevomatCodingStandard.PHP.UselessParentheses"/>
+	<rule ref="SlevomatCodingStandard.PHP.UselessSemicolon"/>
 	<rule ref="SlevomatCodingStandard.Namespaces.AlphabeticallySortedUses">
 		<properties>
 			<property name="caseSensitive" value="true"/>
@@ -127,8 +131,10 @@
 			<property name="searchAnnotations" value="true"/>
 		</properties>
 	</rule>
+	<rule ref="SlevomatCodingStandard.Namespaces.UselessAlias"/>
 	<rule ref="SlevomatCodingStandard.Namespaces.UseDoesNotStartWithBackslash"/>
 	<rule ref="SlevomatCodingStandard.Namespaces.UseFromSameNamespace"/>
+	<rule ref="SlevomatCodingStandard.Operators.RequireCombinedAssignmentOperator"/>
 	<rule ref="SlevomatCodingStandard.TypeHints.DeclareStrictTypes">
 		<properties>
 			<property name="newlinesCountBetweenOpenTagAndDeclare" value="2"/>
@@ -147,6 +153,8 @@
 	</rule>
 	<rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHintSpacing"/>
 	<rule ref="SlevomatCodingStandard.Types.EmptyLinesAroundTypeBraces"/>
+	<rule ref="SlevomatCodingStandard.Variables.UnusedVariable"/>
+	<rule ref="SlevomatCodingStandard.Variables.UselessVariable"/>
 	<rule ref="Squiz.Arrays.ArrayBracketSpacing">
 		<exclude name="Squiz.Arrays.ArrayBracketSpacing.SpaceBeforeBracket"/><!-- does not handle nested array access across multiple lines -->
 	</rule>
diff --git a/composer.json b/composer.json
index e4c311f..a0eb894 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
 	"require": {
 		"php": "~7.1",
 		"squizlabs/php_codesniffer": "~3.3.0",
-		"slevomat/coding-standard": "~4.6"
+		"slevomat/coding-standard": "~4.7"
 	},
 	"require-dev": {
 		"jakub-onderka/php-console-highlighter": "0.3.2",
diff --git a/tests/Sniffs/TestCase.php b/tests/Sniffs/TestCase.php
index 7be4389..cca47e4 100644
--- a/tests/Sniffs/TestCase.php
+++ b/tests/Sniffs/TestCase.php
@@ -94,7 +94,7 @@ protected function assertSniffError(PhpCsFile $resultFile, int $line, string $co
 			sprintf(
 				'Expected code %s%s, but not found on line %s.%sErrors found on this line:%s%s%s',
 				$expectedCode,
-				($message !== null) ? sprintf(' with message "%s"', $message) : '',
+				$message !== null ? sprintf(' with message "%s"', $message) : '',
 				$line,
 				PHP_EOL,
 				PHP_EOL,
@@ -162,7 +162,7 @@ protected function assertNoSniffErrorInFile(PhpCsFile $file): void
 	private function getFormattedErrorsForFile(array $errorsForFile): string
 	{
 		$message = '';
-		foreach ($errorsForFile as $line => $errorsForPossition) {
+		foreach (array_keys($errorsForFile) as $line) {
 			$message .= sprintf(
 				'%d:%s%s%s',
 				$line,
@@ -186,8 +186,8 @@ private function getFormattedErrorsOnLine(array $errorsForFile, int $line): stri
 			return '';
 		}
 
-		return implode(PHP_EOL, array_map(function (array $errorsForPosition) {
-			return implode(PHP_EOL, array_map(function (array $errorForPosition) {
+		return implode(PHP_EOL, array_map(static function (array $errorsForPosition) {
+			return implode(PHP_EOL, array_map(static function (array $errorForPosition) {
 				return sprintf("\t" . '%s: %s', $errorForPosition['source'], $errorForPosition['message']);
 			}, $errorsForPosition));
 		}, $errorsForFile[$line]));