diff --git a/.travis.yml b/.travis.yml
index f50e2b4..5c746a4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,9 @@ install:
       pear channel-update pear.php.net;
       pear install PHP_CodeSniffer;
     fi
+  - if [[ $TRAVIS_PHP_VERSION == "7.0" ]]; then
+      composer global require phpunit/phpunit ^6;
+    fi
 
 script:
   - phpenv rehash
@@ -17,6 +20,9 @@ script:
     else
       phpcs . --standard=phpcs.xml --warning-severity=0 --extensions=php -p;
     fi
+  - if [[ $TRAVIS_PHP_VERSION == "7.0" ]]; then
+      phpunit --configuration=phpunit.xml --include-path=lib/;
+    fi
 
 matrix:
   fast_finish: true
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..16a082d
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,16 @@
+<phpunit
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.5/phpunit.xsd"
+	colors="true"
+	processIsolation="false"
+	timeoutForSmallTests="1"
+	timeoutForMediumTests="1"
+	timeoutForLargeTests="6" >
+
+	<testsuites>
+		<testsuite name="Standard test suite">
+		<file>tests/BridgeImplementationTest.php</file>
+		</testsuite>
+	</testsuites>
+
+</phpunit>
diff --git a/tests/BridgeImplementationTest.php b/tests/BridgeImplementationTest.php
new file mode 100644
index 0000000..aff2cb8
--- /dev/null
+++ b/tests/BridgeImplementationTest.php
@@ -0,0 +1,193 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\TestResult;
+use PHPUnit\Framework\AssertionFailedError;
+
+require_once('Bridge.php');
+require_once('BridgeAbstract.php');
+require_once('FeedExpander.php');
+
+Bridge::setDir(__DIR__ . '/../bridges/');
+
+/**
+ * This class checks bridges for implementation details:
+ *
+ * - A bridge must not implement public functions other than the ones specified
+ *   by the bridge interfaces. Custom functions must be defined in private or
+ *   protected scope.
+ * - getName() must return a valid string (non-empty)
+ * - getURI() must return a valid URI
+ * - A bridge must define constants for NAME, URI, DESCRIPTION and MAINTAINER,
+ *   CACHE_TIMEOUT and PARAMETERS are optional
+ */
+final class BridgeImplementationTest extends TestCase {
+
+	private function CheckBridgePublicFunctions($bridgeName){
+
+		$parent_methods = array();
+
+		if(in_array('BridgeInterface', class_parents($bridgeName))) {
+			$parent_methods = array_merge($parent_methods, get_class_methods('BridgeInterface'));
+		}
+
+		if(in_array('BridgeAbstract', class_parents($bridgeName))) {
+			$parent_methods = array_merge($parent_methods, get_class_methods('BridgeAbstract'));
+		}
+
+		if(in_array('FeedExpander', class_parents($bridgeName))) {
+			$parent_methods = array_merge($parent_methods, get_class_methods('FeedExpander'));
+		}
+
+		// Receive all non abstract methods
+		$methods = array_diff(get_class_methods($bridgeName), $parent_methods);
+		$method_names = implode(', ', $methods);
+
+		$errmsg = $bridgeName
+		. ' implements additional public method(s): '
+		. $method_names
+		. '! Custom functions must be defined in private or protected scope!';
+
+		$this->assertEmpty($method_names, $errmsg);
+
+	}
+
+	private function CheckBridgeGetNameDefaultValue($bridgeName){
+
+		if(in_array('BridgeAbstract', class_parents($bridgeName))) { // Is bridge
+
+			if(!$this->isFunctionMemberOf($bridgeName, 'getName'))
+				return;
+
+			$bridge = new $bridgeName();
+			$abstract = new BridgeAbstractTest();
+
+			$message = $bridgeName . ': \'getName\' must return a valid name!';
+
+			$this->assertNotEmpty(trim($bridge->getName()), $message);
+
+		}
+
+	}
+
+	// Checks whether the getURI function returns empty or default values
+	private function CheckBridgeGetURIDefaultValue($bridgeName){
+
+		if(in_array('BridgeAbstract', class_parents($bridgeName))) { // Is bridge
+
+			if(!$this->isFunctionMemberOf($bridgeName, 'getURI'))
+				return;
+
+			$bridge = new $bridgeName();
+			$abstract = new BridgeAbstractTest();
+
+			$message = $bridgeName . ': \'getURI\' must return a valid URI!';
+
+			$this->assertNotEmpty(trim($bridge->getURI()), $message);
+
+		}
+
+	}
+
+	private function CheckBridgePublicConstants($bridgeName){
+
+		// Assertion only works for BridgeAbstract!
+		if(in_array('BridgeAbstract', class_parents($bridgeName))) {
+
+			$ref = new ReflectionClass($bridgeName);
+			$constants = $ref->getConstants();
+
+			$ref = new ReflectionClass('BridgeAbstract');
+			$parent_constants = $ref->getConstants();
+
+			foreach($parent_constants as $key => $value) {
+
+				$this->assertArrayHasKey($key, $constants, 'Constant ' . $key . ' missing in ' . $bridgeName);
+
+				// Skip optional constants
+				if($key !== 'PARAMETERS' && $key !== 'CACHE_TIMEOUT') {
+					$this->assertNotEquals($value, $constants[$key], 'Constant ' . $key . ' missing in ' . $bridgeName);
+				}
+
+			}
+
+		}
+
+	}
+
+	private function isFunctionMemberOf($bridgeName, $functionName){
+
+		$bridgeReflector = new ReflectionClass($bridgeName);
+		$bridgeMethods = $bridgeReflector->GetMethods();
+		$bridgeHasMethod = false;
+
+		foreach($bridgeMethods as $method) {
+
+			if($method->name === $functionName && $method->class === $bridgeReflector->name) {
+				return true;
+			}
+
+		}
+
+		return false;
+
+	}
+
+	public function testBridgeImplementation($bridgeName){
+
+		require_once('bridges/' . $bridgeName . '.php');
+
+		$this->CheckBridgePublicFunctions($bridgeName);
+		$this->CheckBridgePublicConstants($bridgeName);
+		$this->CheckBridgeGetNameDefaultValue($bridgeName);
+		$this->CheckBridgeGetURIDefaultValue($bridgeName);
+
+	}
+
+	public function count() {
+		return count(Bridge::listBridges());
+	}
+
+	public function run(TestResult $result = null) {
+
+		if ($result === null) {
+			$result = new TestResult;
+		}
+
+		foreach (Bridge::listBridges() as $bridge) {
+
+			$bridge .= 'Bridge';
+
+			$result->startTest($this);
+			PHP_Timer::start();
+			$stopTime = null;
+
+			try {
+				$this->testBridgeImplementation($bridge);
+			} catch (AssertionFailedError $e) {
+
+				$stopTime = PHP_Timer::stop();
+				$result->addFailure($this, $e, $stopTime);
+
+			} catch (Exception $e) {
+
+				$stopTime = PHP_Timer::stop();
+				$result->addError($this, $e, $stopTime);
+
+			}
+
+			if ($stopTime === null) {
+				$stopTime = PHP_Timer::stop();
+			}
+
+			$result->endTest($this, $stopTime);
+
+		}
+
+		return $result;
+	}
+}
+
+class BridgeAbstractTest extends BridgeAbstract {
+	public function collectData(){}
+}