diff --git a/backend/FwLite/FwDataMiniLcmBridge.Tests/MiniLcmTests/PartOfSpeechTests.cs b/backend/FwLite/FwDataMiniLcmBridge.Tests/MiniLcmTests/PartOfSpeechTests.cs
index 3943623a0..5533cbb2b 100644
--- a/backend/FwLite/FwDataMiniLcmBridge.Tests/MiniLcmTests/PartOfSpeechTests.cs
+++ b/backend/FwLite/FwDataMiniLcmBridge.Tests/MiniLcmTests/PartOfSpeechTests.cs
@@ -1,6 +1,7 @@
 using FwDataMiniLcmBridge.Api;
 using FwDataMiniLcmBridge.Tests.Fixtures;
 using MiniLcm.Models;
+using SIL.LCModel;
 using SIL.LCModel.Infrastructure;
 
 namespace FwDataMiniLcmBridge.Tests.MiniLcmTests;
@@ -81,4 +82,31 @@ public async Task SetPartOfSpeech_WithNullMorphoSyntaxAnalysisRA_ToNull()
         retrievedEntry.Should().NotBeNull();
         retrievedEntry!.PartOfSpeechId.Should().BeNull();
     }
+
+    [Fact]
+    public async Task GetPartsOfSpeech_DoesNotReturnReversalIndexPos()
+    {
+        // Arrange
+        var fwApi = (FwDataMiniLcmApi)BaseApi;
+        var reversalIndexRepository = fwApi.Cache.ServiceLocator.GetInstance<IReversalIndexRepository>();
+        var analysisWs = fwApi.Cache.DefaultAnalWs;
+
+        var reversalPosGuid = Guid.NewGuid();
+        UndoableUnitOfWorkHelper.DoUsingNewOrCurrentUOW("Create Reversal Index POS",
+            "Remove Reversal Index POS",
+            fwApi.Cache.ServiceLocator.ActionHandler,
+            () =>
+            {
+                var reversalIndex = reversalIndexRepository.FindOrCreateIndexForWs(analysisWs);
+                var posFactory = fwApi.Cache.ServiceLocator.GetInstance<IPartOfSpeechFactory>();
+                var reversalPos = posFactory.Create(reversalPosGuid, reversalIndex.PartsOfSpeechOA);
+                reversalPos.Name.set_String(analysisWs, "Reversal Test POS");
+            });
+
+        // Act
+        var partsOfSpeech = await Api.GetPartsOfSpeech().ToArrayAsync();
+
+        // Assert
+        partsOfSpeech.Should().NotContain(pos => pos.Id == reversalPosGuid);
+    }
 }
diff --git a/backend/FwLite/FwDataMiniLcmBridge/Api/FwDataMiniLcmApi.cs b/backend/FwLite/FwDataMiniLcmBridge/Api/FwDataMiniLcmApi.cs
index bcaeb438f..c52fba6a0 100644
--- a/backend/FwLite/FwDataMiniLcmBridge/Api/FwDataMiniLcmApi.cs
+++ b/backend/FwLite/FwDataMiniLcmBridge/Api/FwDataMiniLcmApi.cs
@@ -271,8 +271,7 @@ void MoveWs(CoreWritingSystemDefinition ws,
 
     public IAsyncEnumerable<PartOfSpeech> GetPartsOfSpeech()
     {
-        return PartOfSpeechRepository
-            .AllInstances()
+        return Cache.LangProject.AllPartsOfSpeech
             .OrderBy(p => p.Name.BestAnalysisAlternative.Text)
             .ToAsyncEnumerable()
             .Select(FromLcmPartOfSpeech);
diff --git a/backend/FwLite/FwLiteProjectSync.Tests/SyncTests.cs b/backend/FwLite/FwLiteProjectSync.Tests/SyncTests.cs
index b7e5cc734..ed027c1d3 100644
--- a/backend/FwLite/FwLiteProjectSync.Tests/SyncTests.cs
+++ b/backend/FwLite/FwLiteProjectSync.Tests/SyncTests.cs
@@ -64,6 +64,14 @@ public async Task DisposeAsync()
         {
             await _fixture.CrdtApi.DeleteEntry(entry.Id);
         }
+        await foreach (var pos in _fixture.FwDataApi.GetPartsOfSpeech())
+        {
+            await _fixture.FwDataApi.DeletePartOfSpeech(pos.Id);
+        }
+        foreach (var pos in await _fixture.CrdtApi.GetPartsOfSpeech().ToArrayAsync())
+        {
+            await _fixture.CrdtApi.DeletePartOfSpeech(pos.Id);
+        }
     }
 
     public SyncTests(SyncFixture fixture)