diff --git a/LCM.sln b/LCM.sln
index 91956680..370daf0f 100644
--- a/LCM.sln
+++ b/LCM.sln
@@ -53,64 +53,186 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SIL.LCModel.FixData", "src\
 EndProject
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 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SIL.LCModel.TestUtilities", "tests\SIL.LCModel.TestUtilities\SIL.LCModel.TestUtilities.csproj", "{FF70FD35-CD0F-4E5E-9807-AC3849391923}"
+EndProject
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@@ -130,6 +252,7 @@ Global
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diff --git a/tests/SIL.LCModel.Core.Tests/SIL.LCModel.Core.Tests.csproj b/tests/SIL.LCModel.Core.Tests/SIL.LCModel.Core.Tests.csproj
index 4e801483..b16f267f 100644
--- a/tests/SIL.LCModel.Core.Tests/SIL.LCModel.Core.Tests.csproj
+++ b/tests/SIL.LCModel.Core.Tests/SIL.LCModel.Core.Tests.csproj
@@ -5,7 +5,7 @@
     <RootNamespace>SIL.LCModel.Core</RootNamespace>
     <Description>The liblcm library is the core FieldWorks model for linguistic analyses of languages. Tools in this library provide the ability to store and interact with language and culture data, including anthropological, text corpus, and linguistics data.
 This package provides unit tests for SIL.LCModel.Core.</Description>
-    <IsPackable>true</IsPackable>
+    <IsPackable>false</IsPackable>
     <Nullable>disable</Nullable>
   </PropertyGroup>
 
@@ -24,6 +24,7 @@ This package provides unit tests for SIL.LCModel.Core.</Description>
     <ProjectReference Include="..\..\src\SIL.LCModel.Core\SIL.LCModel.Core.csproj" />
     <ProjectReference Include="..\SIL.LCModel.Utils.Tests\SIL.LCModel.Utils.Tests.csproj" />
     <ProjectReference Include="..\TestHelper\TestHelper.csproj" PrivateAssets="All" />
+    <ProjectReference Include="..\SIL.LCModel.TestUtilities\SIL.LCModel.TestUtilities.csproj" />
   </ItemGroup>
 
   <ItemGroup>
@@ -41,9 +42,17 @@ This package provides unit tests for SIL.LCModel.Core.</Description>
     </EmbeddedResource>
   </ItemGroup>
 
+  <ItemGroup>
+    <Compile Remove="Attributes\InitializeIcuAttribute.cs" />
+    <Compile Remove="Text\AssertEx.cs" />
+    <Compile Remove="Text\TsSerializerTestsBase.cs" />
+    <Compile Remove="Text\TsStringHelper.cs" />
+    <Compile Remove="Text\TsTextPropsHelper.cs" />
+  </ItemGroup>
+
   <Target Name="CollectRuntimeOutputs" BeforeTargets="_GetPackageFiles">
     <ItemGroup>
       <None Include="$(OutputPath)\**\$(PackageId).dll.config" Pack="true" PackagePath="lib" />
 	</ItemGroup>
   </Target>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/tests/SIL.LCModel.TestUtilities/SIL.LCModel.TestUtilities.csproj b/tests/SIL.LCModel.TestUtilities/SIL.LCModel.TestUtilities.csproj
new file mode 100644
index 00000000..97d35048
--- /dev/null
+++ b/tests/SIL.LCModel.TestUtilities/SIL.LCModel.TestUtilities.csproj
@@ -0,0 +1,53 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>net462;net8.0</TargetFrameworks>
+    <RootNamespace>SIL.LCModel.TestUtilities</RootNamespace>
+    <Description>Shared test utility classes aggregated from SIL.LCModel test projects.</Description>
+    <IsPackable>true</IsPackable>
+    <Nullable>disable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="GitVersion.MsBuild" Version="5.6.10" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
+    <PackageReference Include="Moq" Version="4.20.70" />
+    <PackageReference Include="NUnit" Version="3.13.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\SIL.LCModel\SIL.LCModel.csproj" />
+    <ProjectReference Include="..\..\src\SIL.LCModel.Core\SIL.LCModel.Core.csproj" />
+    <ProjectReference Include="..\..\src\SIL.LCModel.Utils\SIL.LCModel.Utils.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Include="..\SIL.LCModel.Utils.Tests\DummyFileMaker.cs" Link="Utils\DummyFileMaker.cs" />
+    <Compile Include="..\SIL.LCModel.Utils.Tests\MockFileOs.cs" Link="Utils\MockFileOs.cs" />
+    <Compile Include="..\SIL.LCModel.Utils.Tests\TestSmallDictionary.cs" Link="Utils\TestSmallDictionary.cs" />
+    <Compile Include="..\SIL.LCModel.Utils.Tests\Attributes\CleanupSingletonsAttribute.cs" Link="Utils\Attributes\CleanupSingletonsAttribute.cs" />
+
+    <Compile Include="..\SIL.LCModel.Core.Tests\Attributes\InitializeIcuAttribute.cs" Link="Core\Attributes\InitializeIcuAttribute.cs" />
+    <Compile Include="..\SIL.LCModel.Core.Tests\Text\AssertEx.cs" Link="Core\Text\AssertEx.cs" />
+    <Compile Include="..\SIL.LCModel.Core.Tests\Text\TsSerializerTestsBase.cs" Link="Core\Text\TsSerializerTestsBase.cs" />
+    <Compile Include="..\SIL.LCModel.Core.Tests\Text\TsStringHelper.cs" Link="Core\Text\TsStringHelper.cs" />
+    <Compile Include="..\SIL.LCModel.Core.Tests\Text\TsTextPropsHelper.cs" Link="Core\Text\TsTextPropsHelper.cs" />
+
+    <Compile Include="..\SIL.LCModel.Tests\TestProjectId.cs" Link="Lcm\TestProjectId.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\LcmTestHelper.cs" Link="Lcm\LcmTestHelper.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\DummyProgressDlg.cs" Link="Lcm\DummyProgressDlg.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\DummyLcmUI.cs" Link="Lcm\DummyLcmUI.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\TestDirectoryFinder.cs" Link="Lcm\TestDirectoryFinder.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\TestLcmDirectories.cs" Link="Lcm\TestLcmDirectories.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\LcmTestBase.cs" Link="Lcm\LcmTestBase.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\ScrInMemoryLcmTestBase.cs" Link="Lcm\ScrInMemoryLcmTestBase.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\DomainServices\InterlinearTestBase.cs" Link="Lcm\DomainServices\InterlinearTestBase.cs" />
+
+    <Compile Include="..\SIL.LCModel.Tests\RhinoMocksToMoq\Expect.cs" Link="Lcm\RhinoMocksToMoq\Expect.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\RhinoMocksToMoq\MockRepository.cs" Link="Lcm\RhinoMocksToMoq\MockRepository.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\RhinoMocksToMoq\MoqAdapter.cs" Link="Lcm\RhinoMocksToMoq\MoqAdapter.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\RhinoMocksToMoq\MoqExtensions.cs" Link="Lcm\RhinoMocksToMoq\MoqExtensions.cs" />
+    <Compile Include="..\SIL.LCModel.Tests\RhinoMocksToMoq\MockExtensions.cs" Link="Lcm\RhinoMocksToMoq\MockExtensions.cs" />
+  </ItemGroup>
+
+</Project>
diff --git a/tests/SIL.LCModel.Tests/SIL.LCModel.Tests.csproj b/tests/SIL.LCModel.Tests/SIL.LCModel.Tests.csproj
index 8c2fdc07..35de8be1 100644
--- a/tests/SIL.LCModel.Tests/SIL.LCModel.Tests.csproj
+++ b/tests/SIL.LCModel.Tests/SIL.LCModel.Tests.csproj
@@ -5,7 +5,7 @@
     <RootNamespace>SIL.LCModel</RootNamespace>
     <Description>The liblcm library is the core FieldWorks model for linguistic analyses of languages. Tools in this library provide the ability to store and interact with language and culture data, including anthropological, text corpus, and linguistics data.
 This package provides unit tests for SIL.LCModel.</Description>
-    <IsPackable>true</IsPackable>
+    <IsPackable>false</IsPackable>
 	  <Nullable>disable</Nullable>
   </PropertyGroup>
 
@@ -22,6 +22,7 @@ This package provides unit tests for SIL.LCModel.</Description>
   <ItemGroup>
     <ProjectReference Include="..\..\src\SIL.LCModel\SIL.LCModel.csproj" />
     <ProjectReference Include="..\SIL.LCModel.Core.Tests\SIL.LCModel.Core.Tests.csproj" />
+    <ProjectReference Include="..\SIL.LCModel.TestUtilities\SIL.LCModel.TestUtilities.csproj" />
   </ItemGroup>
 
   <ItemGroup>
@@ -33,4 +34,22 @@ This package provides unit tests for SIL.LCModel.</Description>
       <None Include="$(OutputPath)\**\$(PackageId).dll.config" Pack="true" PackagePath="lib" />
 	</ItemGroup>
   </Target>
+
+  <ItemGroup>
+    <Compile Remove="TestProjectId.cs" />
+    <Compile Remove="LcmTestHelper.cs" />
+    <Compile Remove="DummyProgressDlg.cs" />
+    <Compile Remove="DummyLcmUI.cs" />
+    <Compile Remove="TestDirectoryFinder.cs" />
+    <Compile Remove="TestLcmDirectories.cs" />
+    <Compile Remove="LcmTestBase.cs" />
+    <Compile Remove="ScrInMemoryLcmTestBase.cs" />
+    <Compile Remove="DomainServices\InterlinearTestBase.cs" />
+    <Compile Remove="RhinoMocksToMoq\Expect.cs" />
+    <Compile Remove="RhinoMocksToMoq\MockRepository.cs" />
+    <Compile Remove="RhinoMocksToMoq\MoqAdapter.cs" />
+    <Compile Remove="RhinoMocksToMoq\MoqExtensions.cs" />
+    <Compile Remove="RhinoMocksToMoq\MockExtensions.cs" />
+    <None Remove="RhinoMocksToMoq\LICENSE" />
+  </ItemGroup>
 </Project>
diff --git a/tests/SIL.LCModel.Utils.Tests/SIL.LCModel.Utils.Tests.csproj b/tests/SIL.LCModel.Utils.Tests/SIL.LCModel.Utils.Tests.csproj
index 4d49c838..c19ad3b4 100644
--- a/tests/SIL.LCModel.Utils.Tests/SIL.LCModel.Utils.Tests.csproj
+++ b/tests/SIL.LCModel.Utils.Tests/SIL.LCModel.Utils.Tests.csproj
@@ -5,7 +5,7 @@
     <RootNamespace>SIL.LCModel.Utils</RootNamespace>
     <Description>The liblcm library is the core FieldWorks model for linguistic analyses of languages. Tools in this library provide the ability to store and interact with language and culture data, including anthropological, text corpus, and linguistics data.
 This package provides unit tests for SIL.LCModel.Utils and test utility classes</Description>
-    <IsPackable>true</IsPackable>
+    <IsPackable>false</IsPackable>
 	  <Nullable>disable</Nullable>
   </PropertyGroup>
 
@@ -21,6 +21,14 @@ This package provides unit tests for SIL.LCModel.Utils and test utility classes<
 
   <ItemGroup>
     <ProjectReference Include="..\..\src\SIL.LCModel.Utils\SIL.LCModel.Utils.csproj" />
+    <ProjectReference Include="..\SIL.LCModel.TestUtilities\SIL.LCModel.TestUtilities.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Remove="DummyFileMaker.cs" />
+    <Compile Remove="TestSmallDictionary.cs" />
+    <Compile Remove="MockFileOs.cs" />
+    <Compile Remove="Attributes\CleanupSingletonsAttribute.cs" />
   </ItemGroup>
 
   <Target Name="CollectRuntimeOutputs" BeforeTargets="_GetPackageFiles">