diff --git a/src/firely-net-sdk-tests.props b/src/firely-net-sdk-tests.props
index f9a9aa4b2c..822b19cdd5 100644
--- a/src/firely-net-sdk-tests.props
+++ b/src/firely-net-sdk-tests.props
@@ -2,17 +2,13 @@
 	<PropertyGroup>
 		<TargetFrameworks>net8.0</TargetFrameworks>
 		<LangVersion>12.0</LangVersion>
+		<EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization>
 	</PropertyGroup>
 
 	<PropertyGroup>
 		<ContainsTests>true</ContainsTests>
 	</PropertyGroup>
 
-	<!-- General compiler settings -->
-	<PropertyGroup>
-		<LangVersion>11.0</LangVersion>
-	</PropertyGroup>
-
 	<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|netcoreapp2.1|AnyCPU'">
 		<DefineConstants>DEBUG;TRACE</DefineConstants>
 	</PropertyGroup>