diff --git a/ChangeLog b/ChangeLog
index d01bf9e..050dda3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2019-08-04  Ben Elliston  <bje@gnu.org>
+
+	* testsuite/config-sub.data: Add some old Pentium test cases.
+
 2019-07-24  Ben Elliston  <bje@gnu.org>
 
 	* config.guess (mips:OSF1:*.*): Whitespace cleanup.
diff --git a/testsuite/config-sub.data b/testsuite/config-sub.data
index f4c8e39..5736629 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -508,6 +508,11 @@ pc98-freebsd					i386-pc-freebsd
 pc98						i386-pc-none
 pdp10						pdp10-unknown-tops20
 pdp11						pdp11-dec-none
+pentium2					i686-unknown-none
+pentium3					i686-unknown-none
+pentium						i586-unknown-none
+pentiumii					i686-unknown-none
+pentiumiii					i686-unknown-none
 picochip					picochip-unknown-none
 pjl						pjl-unknown-none
 pj						pj-unknown-none