diff --git a/src/UglyToad.PdfPig.Tests/UglyToad.PdfPig.Tests.csproj b/src/UglyToad.PdfPig.Tests/UglyToad.PdfPig.Tests.csproj
index f16fb0bb..b2abdf4c 100644
--- a/src/UglyToad.PdfPig.Tests/UglyToad.PdfPig.Tests.csproj
+++ b/src/UglyToad.PdfPig.Tests/UglyToad.PdfPig.Tests.csproj
@@ -8,6 +8,7 @@
     <LangVersion>latest</LangVersion>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\pdfpig.snk</AssemblyOriginatorKeyFile>
+    <RuntimeFrameworkVersion Condition="'$(TargetFramework)'=='netcoreapp2.1'">2.1.30</RuntimeFrameworkVersion>
   </PropertyGroup>
 
   <ItemGroup>