diff --git a/tests/PSRule.EditorServices.Tests/PSRule.EditorServices.Tests.csproj b/tests/PSRule.EditorServices.Tests/PSRule.EditorServices.Tests.csproj
index f37a85f93f..b186b5d393 100644
--- a/tests/PSRule.EditorServices.Tests/PSRule.EditorServices.Tests.csproj
+++ b/tests/PSRule.EditorServices.Tests/PSRule.EditorServices.Tests.csproj
@@ -13,7 +13,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="OmniSharp.Extensions.LanguageProtocol.Testing" Version="0.19.9" />
+    <PackageReference Include="OmniSharp.Extensions.LanguageProtocol.Testing" Version="1.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.10.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0">