From 82cbce6b7e258a651ff2e8de580fc10f5b0e9468 Mon Sep 17 00:00:00 2001
From: Itamar Turner-Trauring <itamar@itamarst.org>
Date: Wed, 6 Oct 2021 15:12:22 -0400
Subject: [PATCH] Better explanation.

---
 src/allmydata/test/test_istorageserver.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/allmydata/test/test_istorageserver.py b/src/allmydata/test/test_istorageserver.py
index 931cf6ed6..26d976d00 100644
--- a/src/allmydata/test/test_istorageserver.py
+++ b/src/allmydata/test/test_istorageserver.py
@@ -647,7 +647,9 @@ class IStorageServerMutableAPIsTestsMixin(object):
             tw_vectors={
                 0: ([], [(0, b"abcdefg")], 7),
                 1: ([], [(0, b"0123"), (4, b"456")], 7),
-                2: ([], [(0, b"0123")], 4),
+                # This will never get read from, just here to show we only read
+                # from shares explicitly requested by slot_readv:
+                2: ([], [(0, b"XYZW")], 4),
             },
             r_vector=[],
         )