diff --git a/.travis.yml b/.travis.yml
index 00c1311..276fc3c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ before_script:
   - git clone --branch=master --depth=1 --quiet git://github.com/WoltLab/WCF.git WCF
   - rm WCF/CodeSniff/WCF/Sniffs/Namespaces/ClassMustBeImportedSniff.php
   - rm WCF/CodeSniff/WCF/Sniffs/Namespaces/UseDeclarationSniff.php
-  - sed -i 's/<rule ref="WCF.Namespaces.ClassMustBeImported" />//' WCF/CodeSniff/WCF/ruleset.xml
-  - sed -i 's/<rule ref="WCF.Namespaces.UseDeclaration" />//' WCF/CodeSniff/WCF/ruleset.xml
+  - sed -i 's/<rule ref="WCF.Namespaces.ClassMustBeImported" \/>//' WCF/CodeSniff/WCF/ruleset.xml
+  - sed -i 's/<rule ref="WCF.Namespaces.UseDeclaration" \/>//' WCF/CodeSniff/WCF/ruleset.xml
 script:
   - phpcs -p --extensions=php --standard="`pwd`/WCF/CodeSniff/WCF" file