diff --git a/src/FSharpTests/FSharpTests.fsproj b/src/FSharpTests/FSharpTests.fsproj
index 199f133549..4bbbd31782 100644
--- a/src/FSharpTests/FSharpTests.fsproj
+++ b/src/FSharpTests/FSharpTests.fsproj
@@ -2,6 +2,7 @@
   <PropertyGroup>
     <TargetFramework>net6</TargetFramework>
     <GenerateProgramFile>false</GenerateProgramFile>
+    <LangVersion>preview</LangVersion>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Tests.fs" />
diff --git a/src/Verify.Expecto.FSharpTests/Verify.Expecto.FSharpTests.fsproj b/src/Verify.Expecto.FSharpTests/Verify.Expecto.FSharpTests.fsproj
index d12891dfb3..0ba1189650 100644
--- a/src/Verify.Expecto.FSharpTests/Verify.Expecto.FSharpTests.fsproj
+++ b/src/Verify.Expecto.FSharpTests/Verify.Expecto.FSharpTests.fsproj
@@ -3,6 +3,7 @@
     <OutputType>Exe</OutputType>
     <TargetFramework>net6</TargetFramework>
     <GenerateProgramFile>false</GenerateProgramFile>
+    <LangVersion>preview</LangVersion>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Tests.fs" />