diff --git a/src/Tools/Extensions.ApiDescription.Client/test/Microsoft.Extensions.ApiDescription.Client.Tests.csproj b/src/Tools/Extensions.ApiDescription.Client/test/Microsoft.Extensions.ApiDescription.Client.Tests.csproj
index c6a5144e61..5b01ef6ad9 100644
--- a/src/Tools/Extensions.ApiDescription.Client/test/Microsoft.Extensions.ApiDescription.Client.Tests.csproj
+++ b/src/Tools/Extensions.ApiDescription.Client/test/Microsoft.Extensions.ApiDescription.Client.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
     <DefaultItemExcludes>$(DefaultItemExcludes);TestProjects\**\*</DefaultItemExcludes>
     <TestGroupName>ApiDescriptionClientTests</TestGroupName>
   </PropertyGroup>
diff --git a/src/Tools/Extensions.ApiDescription.Client/test/TestProjects/ConsoleClient/ConsoleClient.csproj b/src/Tools/Extensions.ApiDescription.Client/test/TestProjects/ConsoleClient/ConsoleClient.csproj
index 642c7353b6..18c332c188 100644
--- a/src/Tools/Extensions.ApiDescription.Client/test/TestProjects/ConsoleClient/ConsoleClient.csproj
+++ b/src/Tools/Extensions.ApiDescription.Client/test/TestProjects/ConsoleClient/ConsoleClient.csproj
@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
     <IsTestAssetProject>true</IsTestAssetProject>
   </PropertyGroup>
 
diff --git a/src/Tools/Microsoft.dotnet-openapi/src/Microsoft.dotnet-openapi.csproj b/src/Tools/Microsoft.dotnet-openapi/src/Microsoft.dotnet-openapi.csproj
index b425a997aa..35e9c96c78 100644
--- a/src/Tools/Microsoft.dotnet-openapi/src/Microsoft.dotnet-openapi.csproj
+++ b/src/Tools/Microsoft.dotnet-openapi/src/Microsoft.dotnet-openapi.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
     <OutputType>exe</OutputType>
     <Description>Command line tool to add an OpenAPI service reference</Description>
     <RootNamespace>Microsoft.DotNet.Openapi.Tools</RootNamespace>
diff --git a/src/Tools/Microsoft.dotnet-openapi/test/OpenApiAddProjectTests.cs b/src/Tools/Microsoft.dotnet-openapi/test/OpenApiAddProjectTests.cs
index ae791bd2d6..78aff2456a 100644
--- a/src/Tools/Microsoft.dotnet-openapi/test/OpenApiAddProjectTests.cs
+++ b/src/Tools/Microsoft.dotnet-openapi/test/OpenApiAddProjectTests.cs
@@ -25,13 +25,13 @@ namespace Microsoft.DotNet.OpenApi.Add.Tests
             {
                 var project1 = refProj1.WithCSharpProject("refProj");
                 project1
-                    .WithTargetFrameworks("netcoreapp3.0")
+                    .WithTargetFrameworks("netcoreapp5.0")
                     .Dir()
                     .Create();
 
                 var project2 = refProj2.WithCSharpProject("refProj2");
                 project2
-                    .WithTargetFrameworks("netcoreapp3.0")
+                    .WithTargetFrameworks("netcoreapp5.0")
                     .Dir()
                     .Create();
 
@@ -64,7 +64,7 @@ namespace Microsoft.DotNet.OpenApi.Add.Tests
                 var refProjName = "refProj";
                 var csproj = refProj.WithCSharpProject(refProjName);
                 csproj
-                    .WithTargetFrameworks("netcoreapp3.0")
+                    .WithTargetFrameworks("netcoreapp5.0")
                     .Dir()
                     .Create();
 
@@ -98,7 +98,7 @@ namespace Microsoft.DotNet.OpenApi.Add.Tests
                 var refProjName = "refProj";
                 refProj
                     .WithCSharpProject(refProjName)
-                    .WithTargetFrameworks("netcoreapp3.0")
+                    .WithTargetFrameworks("netcoreapp5.0")
                     .Dir()
                     .Create();
 
diff --git a/src/Tools/Microsoft.dotnet-openapi/test/OpenApiRemoveTests.cs b/src/Tools/Microsoft.dotnet-openapi/test/OpenApiRemoveTests.cs
index 5a110a7c66..404687ee43 100644
--- a/src/Tools/Microsoft.dotnet-openapi/test/OpenApiRemoveTests.cs
+++ b/src/Tools/Microsoft.dotnet-openapi/test/OpenApiRemoveTests.cs
@@ -20,7 +20,7 @@ namespace Microsoft.DotNet.OpenApi.Remove.Tests
             var nswagJsonFile = "openapi.json";
             _tempDir
                 .WithCSharpProject("testproj")
-                .WithTargetFrameworks("netcoreapp3.0")
+                .WithTargetFrameworks("netcoreapp5.0")
                 .Dir()
                 .WithContentFile(nswagJsonFile)
                 .WithContentFile("Startup.cs")
@@ -66,7 +66,7 @@ namespace Microsoft.DotNet.OpenApi.Remove.Tests
         {
             _tempDir
                 .WithCSharpProject("testproj")
-                .WithTargetFrameworks("netcoreapp3.0")
+                .WithTargetFrameworks("netcoreapp5.0")
                 .Dir()
                 .WithContentFile("Startup.cs")
                 .Create();
@@ -108,7 +108,7 @@ namespace Microsoft.DotNet.OpenApi.Remove.Tests
         {
             _tempDir
                .WithCSharpProject("testproj")
-               .WithTargetFrameworks("netcoreapp3.0")
+               .WithTargetFrameworks("netcoreapp5.0")
                .Dir()
                .WithContentFile("Startup.cs")
                .Create();
@@ -117,7 +117,7 @@ namespace Microsoft.DotNet.OpenApi.Remove.Tests
             var refProjName = "refProj";
             refProj
                 .WithCSharpProject(refProjName)
-                .WithTargetFrameworks("netcoreapp3.0")
+                .WithTargetFrameworks("netcoreapp5.0")
                 .Dir()
                 .Create();
 
@@ -160,7 +160,7 @@ namespace Microsoft.DotNet.OpenApi.Remove.Tests
             var swagFile2 = "swag2.json";
             _tempDir
                 .WithCSharpProject("testproj")
-                .WithTargetFrameworks("netcoreapp3.0")
+                .WithTargetFrameworks("netcoreapp5.0")
                 .Dir()
                 .WithContentFile(nswagJsonFile)
                 .WithFile(swagFile2)
diff --git a/src/Tools/Microsoft.dotnet-openapi/test/OpenApiTestBase.cs b/src/Tools/Microsoft.dotnet-openapi/test/OpenApiTestBase.cs
index b40d1ae5e8..fff6a2e9a3 100644
--- a/src/Tools/Microsoft.dotnet-openapi/test/OpenApiTestBase.cs
+++ b/src/Tools/Microsoft.dotnet-openapi/test/OpenApiTestBase.cs
@@ -61,7 +61,7 @@ namespace Microsoft.DotNet.OpenApi.Tests
             var nswagJsonFile = "openapi.json";
             var project = _tempDir
                 .WithCSharpProject("testproj", sdk: "Microsoft.NET.Sdk.Web")
-                .WithTargetFrameworks("netcoreapp3.0");
+                .WithTargetFrameworks("netcoreapp5.0");
             var tmp = project.Dir();
 
             if (withOpenApi)
diff --git a/src/Tools/Microsoft.dotnet-openapi/test/dotnet-microsoft.openapi.Tests.csproj b/src/Tools/Microsoft.dotnet-openapi/test/dotnet-microsoft.openapi.Tests.csproj
index 75e36320f9..288c651ed3 100644
--- a/src/Tools/Microsoft.dotnet-openapi/test/dotnet-microsoft.openapi.Tests.csproj
+++ b/src/Tools/Microsoft.dotnet-openapi/test/dotnet-microsoft.openapi.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
     <AssemblyName>Microsoft.DotNet.Open.Api.Tools.Tests</AssemblyName>
     <DefaultItemExcludes>$(DefaultItemExcludes);TestProjects\**\*</DefaultItemExcludes>
     <TestGroupName>DotNetAddOpenAPIReferenceToolsTests</TestGroupName>