diff -up mozilla-release/browser/installer/package-manifest.in.old mozilla-release/browser/installer/package-manifest.in
--- mozilla-release/browser/installer/package-manifest.in.old	2015-04-03 04:30:05.000000000 +0200
+++ mozilla-release/browser/installer/package-manifest.in	2015-04-07 13:17:44.180343700 +0200
@@ -608,7 +608,7 @@
 @RESPATH@/components/MozKeyboard.js
 @RESPATH@/components/InputMethod.manifest
 
-#ifdef MOZ_DEBUG
+#ifdef ENABLE_TESTS
 @RESPATH@/components/TestInterfaceJS.js
 @RESPATH@/components/TestInterfaceJS.manifest
 #endif