diff --git a/caps/tests/mochitest/chrome.ini b/caps/tests/mochitest/chrome.ini
index ee71ad30bbd83..59a1a0c5346c5 100644
--- a/caps/tests/mochitest/chrome.ini
+++ b/caps/tests/mochitest/chrome.ini
@@ -1,7 +1,9 @@
 [DEFAULT]
 skip-if = os == 'android'
 support-files =
+  file_data.txt
   file_disableScript.html
+  !/caps/tests/mochitest/file_data.txt
   !/caps/tests/mochitest/file_disableScript.html
 
 [test_bug995943.xul]