diff --git a/dev/setup/codesniffer/ruleset.xml b/dev/setup/codesniffer/ruleset.xml
index f4f64f40141..e78438d8791 100644
--- a/dev/setup/codesniffer/ruleset.xml
+++ b/dev/setup/codesniffer/ruleset.xml
@@ -16,6 +16,7 @@
 	<exclude-pattern type="relative">htdocs/conf.php</exclude-pattern>
 	<exclude-pattern type="relative">*/nltechno*</exclude-pattern>
 	<exclude-pattern type="relative">*/htdocs/includes</exclude-pattern>
+	<exclude-pattern type="relative">source</exclude-pattern>
 	<exclude-pattern type="relative">.git</exclude-pattern>
 
 	<!-- List of all tests -->