diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2c1000..5a39129 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## x.y.z
 
 ### Added
+- Add PHP_CodeSniffer to the Travis CI build (#44)
 - Auto-release to the TER (#34)
 - Composer script for PHP linting
 
diff --git a/Tests/Acceptance/StarterCest.php b/Tests/Acceptance/StarterCest.php
index 6f3bfad..3069d9b 100644
--- a/Tests/Acceptance/StarterCest.php
+++ b/Tests/Acceptance/StarterCest.php
@@ -1,5 +1,6 @@
 <?php
 declare(strict_types = 1);
+
 namespace OliverKlee\Tea\Tests\Acceptance;
 
 /**
diff --git a/Tests/Acceptance/_support/AcceptanceTester.php b/Tests/Acceptance/_support/AcceptanceTester.php
index 4c7dcbb..2478cfa 100644
--- a/Tests/Acceptance/_support/AcceptanceTester.php
+++ b/Tests/Acceptance/_support/AcceptanceTester.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 
 /**
  * Inherited Methods
@@ -15,12 +15,12 @@
  * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
  *
  * @SuppressWarnings(PHPMD)
-*/
+ */
 class AcceptanceTester extends \Codeception\Actor
 {
     use _generated\AcceptanceTesterActions;
 
-   /**
+   /*
     * Define custom actions here
     */
 }
diff --git a/Tests/Acceptance/_support/Helper/Acceptance.php b/Tests/Acceptance/_support/Helper/Acceptance.php
index 65b9421..51543bf 100644
--- a/Tests/Acceptance/_support/Helper/Acceptance.php
+++ b/Tests/Acceptance/_support/Helper/Acceptance.php
@@ -1,4 +1,5 @@
 <?php
+
 namespace Helper;
 
 // here you can define custom actions
diff --git a/composer.json b/composer.json
index 51c61f2..a431fee 100644
--- a/composer.json
+++ b/composer.json
@@ -34,6 +34,7 @@
     "require-dev": {
         "typo3/cms-fluid-styled-content": "^7.6.23 || ^8.7.10",
         "helhum/typo3-composer-setup": "^0.5.3",
+        "squizlabs/php_codesniffer": "^3.4.2",
         "helmich/typo3-typoscript-lint": "^1.4.7",
         "nimut/testing-framework": "^4.1.3",
         "codeception/codeception": "^2.5"
@@ -63,6 +64,7 @@
     },
     "scripts": {
         "ci:php:lint": "find *.php Classes/ Configuration/ Tests/ -name '*.php' -print0 | xargs -0 -n 1 -P 4 php -l",
+        "ci:php:sniff": "phpcs Classes Tests",
         "ci:ts:lint": "typoscript-lint -c Configuration/TsLint.yml --ansi -n --fail-on-warnings -vvv Configuration/TypoScript/",
         "ci:tests:unit": "phpunit -c .Build/vendor/nimut/testing-framework/res/Configuration/UnitTests.xml Tests/Unit/",
         "ci:tests:functional": "phpunit -c .Build/vendor/nimut/testing-framework/res/Configuration/FunctionalTests.xml Tests/Functional/",
@@ -75,6 +77,7 @@
         ],
         "ci:static": [
             "@ci:php:lint",
+            "@ci:php:sniff",
             "@ci:ts:lint"
         ],
         "ci": [
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
new file mode 100644
index 0000000..6d7204e
--- /dev/null
+++ b/phpcs.xml.dist
@@ -0,0 +1,131 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ruleset name="phpList Coding Standard">
+    <description>
+        This standard requires PHP_CodeSniffer >= 3.4.0.
+    </description>
+
+    <arg name="colors"/>
+    <arg name="extensions" value="php"/>
+
+    <!--The complete PSR-2 rule set-->
+    <rule ref="PSR2"/>
+
+    <!--The complete PSR-12 rule set-->
+    <rule ref="PSR12"/>
+
+    <!-- Arrays -->
+    <rule ref="Generic.Arrays.DisallowLongArraySyntax"/>
+    <rule ref="Squiz.Arrays.ArrayBracketSpacing"/>
+
+    <!-- Classes -->
+    <rule ref="Generic.Classes.DuplicateClassName"/>
+    <rule ref="PSR1.Classes.ClassDeclaration">
+        <exclude-pattern>Tests/Acceptance/_support/</exclude-pattern>
+    </rule>
+    <rule ref="Squiz.Classes.ClassFileName"/>
+    <rule ref="Squiz.Classes.DuplicateProperty"/>
+    <rule ref="Squiz.Classes.LowercaseClassKeywords"/>
+    <rule ref="Squiz.Classes.SelfMemberReference"/>
+
+    <!-- Code analysis -->
+    <rule ref="Generic.CodeAnalysis.AssignmentInCondition"/>
+    <rule ref="Generic.CodeAnalysis.EmptyStatement"/>
+    <rule ref="Generic.CodeAnalysis.ForLoopShouldBeWhileLoop"/>
+    <rule ref="Generic.CodeAnalysis.ForLoopWithTestFunctionCall"/>
+    <rule ref="Generic.CodeAnalysis.JumbledIncrementer"/>
+    <rule ref="Generic.CodeAnalysis.UnconditionalIfStatement"/>
+    <rule ref="Generic.CodeAnalysis.UnnecessaryFinalModifier"/>
+    <rule ref="Generic.CodeAnalysis.UselessOverridingMethod"/>
+
+    <!-- Commenting -->
+    <rule ref="Generic.Commenting.Fixme"/>
+    <rule ref="Generic.Commenting.Todo"/>
+    <rule ref="PEAR.Commenting.InlineComment"/>
+    <rule ref="Squiz.Commenting.DocCommentAlignment"/>
+    <rule ref="Squiz.Commenting.EmptyCatchComment"/>
+    <rule ref="Squiz.Commenting.FunctionCommentThrowTag"/>
+    <rule ref="Squiz.Commenting.PostStatementComment"/>
+
+    <!-- Control structures -->
+    <rule ref="PEAR.ControlStructures.ControlSignature"/>
+
+    <!-- Debug -->
+    <rule ref="Generic.Debug.ClosureLinter"/>
+
+    <!-- Files -->
+    <rule ref="Generic.Files.LineLength">
+        <exclude-pattern>Configuration/TCA/</exclude-pattern>
+    </rule>
+    <rule ref="Generic.Files.OneClassPerFile"/>
+    <rule ref="Generic.Files.OneInterfacePerFile"/>
+    <rule ref="Generic.Files.OneObjectStructurePerFile"/>
+    <rule ref="Zend.Files.ClosingTag"/>
+
+    <!-- Formatting -->
+    <rule ref="PEAR.Formatting.MultiLineAssignment"/>
+
+    <!-- Functions -->
+    <rule ref="Generic.Functions.CallTimePassByReference"/>
+    <rule ref="Squiz.Functions.FunctionDuplicateArgument"/>
+    <rule ref="Squiz.Functions.GlobalFunction"/>
+
+    <!-- Methods -->
+    <rule ref="PSR2.Methods.MethodDeclaration.Underscore">
+        <exclude-pattern>Tests/Acceptance/</exclude-pattern>
+    </rule>
+
+    <!-- Metrics -->
+    <rule ref="Generic.Metrics.CyclomaticComplexity"/>
+    <rule ref="Generic.Metrics.NestingLevel"/>
+
+    <!-- Naming conventions -->
+    <rule ref="Generic.NamingConventions.ConstructorName"/>
+    <rule ref="PEAR.NamingConventions.ValidClassName"/>
+
+    <!-- Objects -->
+    <rule ref="Squiz.Objects.ObjectMemberComma"/>
+
+    <!-- Operators -->
+    <rule ref="Squiz.Operators.IncrementDecrementUsage"/>
+    <rule ref="Squiz.Operators.ValidLogicalOperators"/>
+
+    <!-- PHP -->
+    <rule ref="Generic.PHP.BacktickOperator"/>
+    <rule ref="Generic.PHP.CharacterBeforePHPOpeningTag"/>
+    <rule ref="Generic.PHP.DeprecatedFunctions"/>
+    <rule ref="Generic.PHP.DisallowAlternativePHPTags"/>
+    <rule ref="Generic.PHP.DisallowShortOpenTag"/>
+    <rule ref="Generic.PHP.DiscourageGoto"/>
+    <rule ref="Generic.PHP.ForbiddenFunctions"/>
+    <rule ref="Generic.PHP.NoSilencedErrors"/>
+    <rule ref="Squiz.PHP.CommentedOutCode">
+        <properties>
+            <property name="maxPercentage" value="70"/>
+        </properties>
+    </rule>
+    <rule ref="Squiz.PHP.DisallowMultipleAssignments"/>
+    <rule ref="Squiz.PHP.DisallowSizeFunctionsInLoops"/>
+    <rule ref="Squiz.PHP.DiscouragedFunctions"/>
+    <rule ref="Squiz.PHP.Eval"/>
+    <rule ref="Squiz.PHP.GlobalKeyword"/>
+    <rule ref="Squiz.PHP.Heredoc"/>
+    <rule ref="Squiz.PHP.InnerFunctions"/>
+    <rule ref="Squiz.PHP.LowercasePHPFunctions"/>
+    <rule ref="Squiz.PHP.NonExecutableCode"/>
+
+    <!-- Scope -->
+    <rule ref="Squiz.Scope.MemberVarScope"/>
+    <rule ref="Squiz.Scope.StaticThisUsage"/>
+
+    <!--Strings-->
+    <rule ref="Squiz.Strings.DoubleQuoteUsage"/>
+
+    <!-- Whitespace -->
+    <rule ref="PEAR.WhiteSpace.ObjectOperatorIndent"/>
+    <rule ref="PEAR.WhiteSpace.ScopeClosingBrace"/>
+    <rule ref="Squiz.WhiteSpace.CastSpacing"/>
+    <rule ref="Squiz.WhiteSpace.LogicalOperatorSpacing"/>
+    <rule ref="Squiz.WhiteSpace.OperatorSpacing"/>
+    <rule ref="Squiz.WhiteSpace.PropertyLabelSpacing"/>
+    <rule ref="Squiz.WhiteSpace.SemicolonSpacing"/>
+</ruleset>