diff --git a/src/testdir/test_blob.vim b/src/testdir/test_blob.vim
index 473886d..bd816af 100644
--- a/src/testdir/test_blob.vim
+++ b/src/testdir/test_blob.vim
@@ -675,7 +675,10 @@
   let b = range(16)->repeat(64)->list2blob()
   call assert_equal(1024, b->len())
   call assert_equal([4, 8, 15], [b[100], b[1000], b[1023]])
+
   call assert_equal(0z, list2blob(test_null_list()))
+  call assert_equal(0z00010203, list2blob(range(4)))
 endfunc
 
+
 " vim: shiftwidth=2 sts=2 expandtab