diff --git a/src/testdir/test_blob.vim b/src/testdir/test_blob.vim
index 964ed22..9eb2057 100644
--- a/src/testdir/test_blob.vim
+++ b/src/testdir/test_blob.vim
@@ -154,6 +154,7 @@
     call assert_equal(i, byte)
     let i += 1
   endfor
+    call assert_equal(4, i)
 
   let blob = 0z00
   call remove(blob, 0)
@@ -161,6 +162,19 @@
   for byte in blob
     call assert_error('loop over empty blob')
   endfor
+
+  let blob = 0z0001020304
+  let i = 0
+  for byte in blob
+    call assert_equal(i, byte)
+    if i == 1
+      call remove(blob, 0)
+    elseif i == 3
+      call remove(blob, 3)
+    endif
+    let i += 1
+  endfor
+  call assert_equal(5, i)
 endfunc
 
 func Test_blob_concatenate()