--- tests/primary-prefix-invalid-couples.test.orig	1995-01-01 00:00:00.000000000 +0200
+++ tests/primary-prefix-invalid-couples.test	1995-01-01 00:00:00.000000000 +0200
@@ -182,8 +182,9 @@
 
 # Check that the same failures are present without the `--add-missing'
 # option.
-mv stderr stderr.old
+sort stderr > stderr.old
 AUTOMAKE_fails
-diff stderr.old stderr
+sort stderr > stderr.new
+diff stderr.old stderr.new
 
 :