diff --git a/KSPBuildTools.csproj b/KSPBuildTools.csproj
index 15c8db9..ea0ed01 100644
--- a/KSPBuildTools.csproj
+++ b/KSPBuildTools.csproj
@@ -34,6 +34,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <Content Exclude="tests/*" />
+    <Content Remove="tests/*" />
   </ItemGroup>
 </Project>
\ No newline at end of file