diff --git a/.travis.yml b/.travis.yml
index e4ee4e19..2cce9b1f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -56,3 +56,8 @@ script:
     echo "Running the unit tests";
     vendor/bin/phpunit core/tests/;
     vendor/bin/phpunit Tests/Unit/;
+
+  - >
+    echo;
+    echo "Running PHPMD";
+    vendor/bin/phpmd Classes/ text Configuration/PHPMD/rules.xml;
diff --git a/Configuration/PHPMD/rules.xml b/Configuration/PHPMD/rules.xml
new file mode 100644
index 00000000..1e298035
--- /dev/null
+++ b/Configuration/PHPMD/rules.xml
@@ -0,0 +1,39 @@
+<?xml version="1.0"?>
+<ruleset name="phpList" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+    <description>
+        PHPMD rules for phpList
+    </description>
+
+    <!-- rules from the "clean code" rule set -->
+    <rule ref="rulesets/cleancode.xml/BooleanArgumentFlag"/>
+    <rule ref="rulesets/cleancode.xml/ElseExpression"/>
+    <rule ref="rulesets/cleancode.xml/StaticAccess">
+        <properties>
+            <property name="exceptions" value="\Doctrine\ORM\EntityManager,\Doctrine\ORM\Tools\Setup"/>
+        </properties>
+    </rule>
+
+    <rule ref="rulesets/codesize.xml"/>
+
+    <rule ref="rulesets/controversial.xml"/>
+
+    <rule ref="rulesets/design.xml"/>
+
+    <!-- rules from the "naming" rule set -->
+    <rule ref="rulesets/naming.xml/ShortVariable">
+        <properties>
+            <property name="exceptions" value="id"/>
+        </properties>
+    </rule>
+    <rule ref="rulesets/naming.xml/LongVariable">
+        <properties>
+            <property name="maximum" value="25"/>
+        </properties>
+    </rule>
+    <rule ref="rulesets/naming.xml/ShortMethodName"/>
+    <rule ref="rulesets/naming.xml/ConstructorWithNameAsEnclosingClass"/>
+    <rule ref="rulesets/naming.xml/ConstantNamingConventions"/>
+    <rule ref="rulesets/naming.xml/BooleanGetMethodName"/>
+
+    <rule ref="rulesets/unusedcode.xml"/>
+</ruleset>
diff --git a/composer.json b/composer.json
index 8145f07a..3594ddd0 100644
--- a/composer.json
+++ b/composer.json
@@ -38,7 +38,8 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^6.2.2",
-        "squizlabs/php_codesniffer": "^3.0.1"
+        "squizlabs/php_codesniffer": "^3.0.1",
+        "phpmd/phpmd": "^2.6.0"
     },
     "suggest": {
         "phplist/web-frontend": "^4.0.0-dev",