diff --git a/phpunit.xml b/phpunit.xml
index 528ee4a..9743809 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit
-	backupGlobals="false"
+	 backupGlobals="false"
          backupStaticAttributes="false"
          colors="true"
          convertErrorsToExceptions="true"
@@ -8,7 +8,7 @@
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
-         syntaxCheck="false"
+         syntaxCheck="true"
          bootstrap="Tests/autoload.php.dist"
 >
 	<testsuites>
@@ -16,4 +16,14 @@
 			<directory>Tests</directory>
 		</testsuite>
 	</testsuites>
+	<filter>
+		<whitelist>
+			<directory suffix=".php">.</directory>
+			<exclude>
+				<directory>./Tests</directory>
+				<directory>./test</directory>
+				<directory>./examples</directory>
+			</exclude>
+		</whitelist>
+	</filter>
 </phpunit>