diff --git a/src/testdir/test_increment.ok b/src/testdir/test_increment.ok
index 4a61ad1..03a10cb 100644
--- a/src/testdir/test_increment.ok
+++ b/src/testdir/test_increment.ok
@@ -62,5 +62,132 @@
 
 foobar-10
 
+
+# Test 5
+S5====
+a
+a
+a
+a
+E5====
+
+b
+c
+d
+e
+
+# Test 6
+S6====
+z
+z
+z
+z
+E6====
+
+y
+x
+w
+v
+
+
+# Test 7
+S7====
+2
+1
+0
+-1
+-2
+E7====
+
+3
+2
+1
+0
+-1
+
+1
+0
+-1
+-2
+-3
+
+# Test 8
+S8====
+0x9
+0x9
+E8====
+
+0xa
+0xa
+
+0xa
+0xa
+
+
+# Test 9
+S9====
+2
+2
+
+3
+3
+
+E9====
+
+4
+4
+
+5
+5
+
+
+
+
+# Test 10
+S10====
+1
+1
+1
+1
+E10====
+
+0
+-1
+-2
+-3
+
+
+
+# Test 11
+S11====
+    1
+1
+    1
+    1
+E11====
+
+    2
+1
+    3
+    4
+
+
+# Test 12
+S12====
+0 0
+0 0
+0 0
+E12====
+
+0 1
+1 0
+1 0
+
+
+
+
+
+
+
 ENDTEST