--- a/spec/util_iterators_spec.lua	Fri Sep 21 14:27:46 2018 +0100
+++ b/spec/util_iterators_spec.lua	Fri Sep 21 14:30:20 2018 +0100
@@ -21,6 +21,7 @@
 				if last_key then
 					assert(k > last_key, "Expected "..k.." > "..last_key)
 				end
+				assert.equal(orig[k], v);
 				last_key = k;
 			end
 			assert.equal("d", last_key);
@@ -35,6 +36,7 @@
 				if last_key then
 					assert(k < last_key, "Expected "..k.." > "..last_key)
 				end
+				assert.equal(orig[k], v);
 				last_key = k;
 			end
 			assert.equal("a", last_key);