diff --git a/test/functional/tools/composite_output_tests.xml b/test/functional/tools/composite_output_tests.xml
index 862201e5f90..a9154d9f3c3 100644
--- a/test/functional/tools/composite_output_tests.xml
+++ b/test/functional/tools/composite_output_tests.xml
@@ -2,8 +2,8 @@
   <command>
     mkdir '$output.extra_files_path';
     mkdir '$output.extra_files_path/output';
-    cp $input.extra_files_path/* $output.extra_files_path;
-    echo "1 2 3" > $output.extra_files_path/md5out;
+    cp '$input.extra_files_path'/* '$output.extra_files_path';
+    echo "1 2 3" > '$output.extra_files_path/md5out';
     echo "1" > '$output.extra_files_path/output/1';
   </command>
   <inputs>