diff --git a/tests/FSharp.Compiler.UnitTests/FSharp.Compiler.UnitTests.fsproj b/tests/FSharp.Compiler.UnitTests/FSharp.Compiler.UnitTests.fsproj
index 6c0675f2c9e..0b5454c2c0a 100644
--- a/tests/FSharp.Compiler.UnitTests/FSharp.Compiler.UnitTests.fsproj
+++ b/tests/FSharp.Compiler.UnitTests/FSharp.Compiler.UnitTests.fsproj
@@ -78,10 +78,17 @@
 
   <ItemGroup>
     <ProjectReference Include="$(FSharpSourcesRoot)\Compiler\FSharp.Compiler.Service.fsproj" />
-    <ProjectReference Include="$(FSharpSourcesRoot)\FSharp.Core\FSharp.Core.fsproj" />
     <ProjectReference Include="$(FSharpTestsRoot)\FSharp.Test.Utilities\FSharp.Test.Utilities.fsproj" />
     <ProjectReference Include="..\..\tests\service\data\CSharp_Analysis\CSharp_Analysis.csproj" />
     <PackageReference Include="Dotnet.ProjInfo" Version="0.20.0" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(FSHARPCORE_USE_PACKAGE)' != 'true'">
+    <ProjectReference Include="$(FSharpSourcesRoot)\FSharp.Core\FSharp.Core.fsproj" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(FSHARPCORE_USE_PACKAGE)' == 'true'">
+    <PackageReference Include="FSharp.Core" Version="$(FSharpCoreShippedPackageVersionValue)" />
+  </ItemGroup>
+
 </Project>