diff --git a/src/tests/baseservices/callconvs/CallFunctionPointers.ilproj b/src/tests/baseservices/callconvs/CallFunctionPointers.ilproj
index e7220aa28403a5..0fd08f74084fce 100644
--- a/src/tests/baseservices/callconvs/CallFunctionPointers.ilproj
+++ b/src/tests/baseservices/callconvs/CallFunctionPointers.ilproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.IL">
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+  </PropertyGroup>
   <ItemGroup>
     <Compile Include="CallFunctionPointers.il" />
   </ItemGroup>
diff --git a/src/tests/baseservices/compilerservices/RuntimeWrappedException/StringThrower.ilproj b/src/tests/baseservices/compilerservices/RuntimeWrappedException/StringThrower.ilproj
index a9774833fc1807..d16d855aa32b91 100644
--- a/src/tests/baseservices/compilerservices/RuntimeWrappedException/StringThrower.ilproj
+++ b/src/tests/baseservices/compilerservices/RuntimeWrappedException/StringThrower.ilproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.IL">
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+  </PropertyGroup>
   <ItemGroup>
     <Compile Include="StringThrower.il" />
   </ItemGroup>
diff --git a/src/tests/baseservices/compilerservices/modulector/moduleCctor.ilproj b/src/tests/baseservices/compilerservices/modulector/moduleCctor.ilproj
index 081b39f14a1018..9b614c7ab4e4c3 100644
--- a/src/tests/baseservices/compilerservices/modulector/moduleCctor.ilproj
+++ b/src/tests/baseservices/compilerservices/modulector/moduleCctor.ilproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.IL">
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+  </PropertyGroup>
   <ItemGroup>
     <Compile Include="moduleCctor.il" />
   </ItemGroup>
diff --git a/src/tests/baseservices/exceptions/simple/ILHelper.ilproj b/src/tests/baseservices/exceptions/simple/ILHelper.ilproj
index 73432dd63ba3e3..a0442405049277 100644
--- a/src/tests/baseservices/exceptions/simple/ILHelper.ilproj
+++ b/src/tests/baseservices/exceptions/simple/ILHelper.ilproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.IL">
   <PropertyGroup>
     <CLRTestPriority>1</CLRTestPriority>
+    <OutputType>Library</OutputType>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="ILHelper.il" />
diff --git a/src/tests/baseservices/exceptions/simple/VT.ilproj b/src/tests/baseservices/exceptions/simple/VT.ilproj
index b5f8733125615b..f2220571286b7d 100644
--- a/src/tests/baseservices/exceptions/simple/VT.ilproj
+++ b/src/tests/baseservices/exceptions/simple/VT.ilproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.IL">
   <PropertyGroup>
     <CLRTestPriority>1</CLRTestPriority>
+    <OutputType>Library</OutputType>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="VT.il" />
diff --git a/src/tests/baseservices/typeequivalence/impl/PunningLib.ilproj b/src/tests/baseservices/typeequivalence/impl/PunningLib.ilproj
index 8b878f563fb13e..63831e07c6df90 100644
--- a/src/tests/baseservices/typeequivalence/impl/PunningLib.ilproj
+++ b/src/tests/baseservices/typeequivalence/impl/PunningLib.ilproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.IL">
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+  </PropertyGroup>
   <ItemGroup>
     <Compile Include="PunningLib.il" />
     <ProjectReference Include="TypeImpl.csproj" />
diff --git a/src/tests/baseservices/typeequivalence/signatures/basetestclassesil.ilproj b/src/tests/baseservices/typeequivalence/signatures/basetestclassesil.ilproj
index 16c5501c7a97a6..9de7e713a6e496 100644
--- a/src/tests/baseservices/typeequivalence/signatures/basetestclassesil.ilproj
+++ b/src/tests/baseservices/typeequivalence/signatures/basetestclassesil.ilproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.IL">
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+  </PropertyGroup>
   <ItemGroup>
     <Compile Include="basetestclassesil.il" />
   </ItemGroup>
diff --git a/src/tests/baseservices/typeequivalence/signatures/testclassesil.ilproj b/src/tests/baseservices/typeequivalence/signatures/testclassesil.ilproj
index be40547c1bf555..33d76b40e6cd54 100644
--- a/src/tests/baseservices/typeequivalence/signatures/testclassesil.ilproj
+++ b/src/tests/baseservices/typeequivalence/signatures/testclassesil.ilproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.IL">
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+  </PropertyGroup>
   <ItemGroup>
     <Compile Include="testclassesil.il" />
   </ItemGroup>