diff --git a/packages/cultcache-ts/test/cult-cache.test.ts b/packages/cultcache-ts/test/cult-cache.test.ts
index 2f40358f..76f3d084 100644
--- a/packages/cultcache-ts/test/cult-cache.test.ts
+++ b/packages/cultcache-ts/test/cult-cache.test.ts
@@ -2635,7 +2635,7 @@ test("SingleFileMessagePackBackingStore replaces a file exactly when it reads",
           assert.ok(!keys.includes(envelopes[0]!.key), `${vector} ${operation}`);
         }
       } else if (isDirectory) {
-        await assert.rejects(run, `${vector} ${operation}`);
+        await assert.rejects(run, (error) => !(error instanceof StoreUnreadableError), `${vector} ${operation}: an I/O failure, not a typed refusal`);
         assert.ok((await lstat(file)).isDirectory(), `${vector} ${operation} replaced the directory`);
         assert.deepEqual(await readdir(file), [], `${vector} ${operation} wrote into the directory`);
       } else {
diff --git a/tests/GameCult.Caching.Tests/StoreReadabilityTests.cs b/tests/GameCult.Caching.Tests/StoreReadabilityTests.cs
index 55406948..f923dbfb 100644
--- a/tests/GameCult.Caching.Tests/StoreReadabilityTests.cs
+++ b/tests/GameCult.Caching.Tests/StoreReadabilityTests.cs
@@ -314,6 +314,9 @@ namespace GameCult.Caching.Tests
             Assert.That(() => cache.Commit(batch => batch.Upsert(typeof(IdDeck), new IdDeck { Name = "e" }, new CultRecordKey("e"))),
                 Throws.TypeOf<IOException>().With.Message.Contains("directory"));
 
+            Assert.That(() => cache.Commit(batch => batch.Remove(new CultRecordKey("e"))),
+                Throws.TypeOf<IOException>().With.Message.Contains("directory"));
+
             Assert.That(Directory.GetFileSystemEntries(path), Is.Empty);
             Assert.That(Directory.GetFileSystemEntries(later), Is.Empty);
         }