diff --git a/appveyor.yml b/appveyor.yml
index 7b3a805..d7b73c0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,6 @@
 version: '{build}'
 skip_tags: true
-image: Visual Studio 2017
+image: Visual Studio 2019
 configuration: Release
 install:
   - ps: mkdir -Force ".\build\" | Out-Null
diff --git a/test/Serilog.Enrichers.Environment.Tests/Serilog.Enrichers.Environment.Tests.csproj b/test/Serilog.Enrichers.Environment.Tests/Serilog.Enrichers.Environment.Tests.csproj
index 3bbac4b..c3bb95f 100644
--- a/test/Serilog.Enrichers.Environment.Tests/Serilog.Enrichers.Environment.Tests.csproj
+++ b/test/Serilog.Enrichers.Environment.Tests/Serilog.Enrichers.Environment.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp1.0;net46</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;netcoreapp3.1;net46</TargetFrameworks>
     <AssemblyName>Serilog.Enrichers.Environment.Tests</AssemblyName>
     <AssemblyOriginatorKeyFile>../../assets/Serilog.snk</AssemblyOriginatorKeyFile>
     <SignAssembly>true</SignAssembly>
@@ -21,9 +21,12 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0-preview-20170106-08" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.2.0-beta5-build1225" />
-    <PackageReference Include="xunit" Version="2.2.0-beta5-build3474" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net46' ">