diff --git a/src/GameCult.Caching.MessagePack/CultDocumentMessagePackSerialization.cs b/src/GameCult.Caching.MessagePack/CultDocumentMessagePackSerialization.cs
index 579eddb6..319d8361 100644
--- a/src/GameCult.Caching.MessagePack/CultDocumentMessagePackSerialization.cs
+++ b/src/GameCult.Caching.MessagePack/CultDocumentMessagePackSerialization.cs
@@ -180,7 +180,8 @@ public static class CultDocumentMessagePackSerialization
     /// <summary>
     /// Reads a store file: exactly one complete MessagePack array of three slots (header, schema catalog, records), or an empty
     /// array, which is an empty store. A truncated file, bytes after the array, a value that is not an array, a first slot that
-    /// is not a header string, a store with fewer or more slots, or a body that does not decode are refused with
+    /// is not a header string, a store with fewer or more slots, a record whose schema the catalog does not publish, or a body
+    /// that does not decode are refused with
     /// <see cref="CultStoreUnreadableException"/>, so a reader never takes part of a file for the whole and never skips a slot
     /// it does not understand. The rewriting paths use this same reader as their verdict on whether a file may be replaced.
     /// </summary>
@@ -224,6 +225,7 @@ public static class CultDocumentMessagePackSerialization
                 snapshot.Records[index] = ReadPersistedRecord(ref reader);
             }
 
+            RequirePublishedSchemas(snapshot);
             return snapshot;
         }
         catch (CultStoreUnreadableException)
@@ -236,6 +238,25 @@ public static class CultDocumentMessagePackSerialization
         }
     }
 
+    // A record whose schema the store's catalog does not publish cannot be read by any runtime that has only the file.
+    private static void RequirePublishedSchemas(CultPersistedStoreSnapshot snapshot)
+    {
+        var published = new HashSet<string>(StringComparer.Ordinal);
+        foreach (var entry in snapshot.SchemaCatalog)
+        {
+            published.Add(entry.SchemaId);
+            foreach (var compatible in entry.CompatibleSchemaIds)
+                published.Add(compatible);
+        }
+
+        var unpublished = snapshot.Records.FirstOrDefault(record => !published.Contains(record.SchemaId));
+        if (unpublished != null)
+        {
+            throw new CultStoreUnreadableException(
+                $"Record '{unpublished.Key}' names schema '{unpublished.SchemaId}', which the store's schema catalog does not publish.");
+        }
+    }
+
     private static void RequireOneArray(byte[] bytes)
     {
         var whole = new MessagePackReader(bytes);
diff --git a/tests/GameCult.Caching.Tests/StoreReadabilityTests.cs b/tests/GameCult.Caching.Tests/StoreReadabilityTests.cs
index 7abee9a5..7a7ddb55 100644
--- a/tests/GameCult.Caching.Tests/StoreReadabilityTests.cs
+++ b/tests/GameCult.Caching.Tests/StoreReadabilityTests.cs
@@ -15,7 +15,7 @@ namespace GameCult.Caching.Tests
     public class StoreReadabilityTests
     {
         private const int CSharp = 1;
-        private static readonly CultDocumentRegistry Registry = CultDocumentRegistry.ForTypes(new[] { typeof(IdDeck) });
+        private static readonly CultDocumentRegistry Registry = CultDocumentRegistry.ForTypes(new[] { typeof(IdDeck), typeof(VectorItem) });
         private string _directory = "";
 
         [SetUp]
@@ -66,12 +66,7 @@ namespace GameCult.Caching.Tests
             var path = Path.Combine(_directory, "open.cc");
             File.WriteAllBytes(path, File.ReadAllBytes(Path.Combine(VectorRoot(), vector)));
 
-            using var cache = new CultCache();
-            void Open()
-            {
-                cache.AddBackingStore(new SingleFileMessagePackBackingStore(path));
-                cache.PullAllBackingStoresAsync().GetAwaiter().GetResult();
-            }
+            void Open() => CultCacheMessagePack.Create(path, new CultCacheOpenOptions { Registry = Registry }).Dispose();
 
             if (reads)
                 Assert.DoesNotThrow(Open);