diff --git a/gas/testsuite/gas/all/.Sanitize b/gas/testsuite/gas/all/.Sanitize
index 01b02bba726..f5a05b454d5 100644
--- a/gas/testsuite/gas/all/.Sanitize
+++ b/gas/testsuite/gas/all/.Sanitize
@@ -28,6 +28,7 @@ Things-to-keep:
 
 gas.exp
 comment.s
+diff1.s
 float.s
 p1480.s
 p2425.s