diff --git a/tests/scripts/undiff.sh b/tests/scripts/undiff.sh
index 09c898a190..cb9e13caf5 100755
--- a/tests/scripts/undiff.sh
+++ b/tests/scripts/undiff.sh
@@ -3,7 +3,6 @@
 # Expunge "< " and "> " resulting from diff
 #
 awk '!/^[0-9]/ {print $0}' | \
-	sed "s/^< //" | \
-	sed "s/> //" | \
+	sed "s/^< \|^> \|^- \|^+ //" | \
 	awk '/.+/ {print $0}'