diff --git a/test/Swashbuckle.AspNetCore.Annotations.Test/Swashbuckle.AspNetCore.Annotations.Test.csproj b/test/Swashbuckle.AspNetCore.Annotations.Test/Swashbuckle.AspNetCore.Annotations.Test.csproj
index 55095073dd..633f05fd2b 100644
--- a/test/Swashbuckle.AspNetCore.Annotations.Test/Swashbuckle.AspNetCore.Annotations.Test.csproj
+++ b/test/Swashbuckle.AspNetCore.Annotations.Test/Swashbuckle.AspNetCore.Annotations.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Swashbuckle.AspNetCore.ApiTesting.Test/Swashbuckle.AspNetCore.ApiTesting.Test.csproj b/test/Swashbuckle.AspNetCore.ApiTesting.Test/Swashbuckle.AspNetCore.ApiTesting.Test.csproj
index 7bbd1da8b5..4e75f9981a 100644
--- a/test/Swashbuckle.AspNetCore.ApiTesting.Test/Swashbuckle.AspNetCore.ApiTesting.Test.csproj
+++ b/test/Swashbuckle.AspNetCore.ApiTesting.Test/Swashbuckle.AspNetCore.ApiTesting.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Swashbuckle.AspNetCore.Cli.Test/Swashbuckle.AspNetCore.Cli.Test.csproj b/test/Swashbuckle.AspNetCore.Cli.Test/Swashbuckle.AspNetCore.Cli.Test.csproj
index 95477f35e6..d092c5648d 100644
--- a/test/Swashbuckle.AspNetCore.Cli.Test/Swashbuckle.AspNetCore.Cli.Test.csproj
+++ b/test/Swashbuckle.AspNetCore.Cli.Test/Swashbuckle.AspNetCore.Cli.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Swashbuckle.AspNetCore.IntegrationTests/Swashbuckle.AspNetCore.IntegrationTests.csproj b/test/Swashbuckle.AspNetCore.IntegrationTests/Swashbuckle.AspNetCore.IntegrationTests.csproj
index 2a6013a317..7abc5d6ffb 100644
--- a/test/Swashbuckle.AspNetCore.IntegrationTests/Swashbuckle.AspNetCore.IntegrationTests.csproj
+++ b/test/Swashbuckle.AspNetCore.IntegrationTests/Swashbuckle.AspNetCore.IntegrationTests.csproj
@@ -4,7 +4,7 @@
     <AssemblyOriginatorKeyFile>$(MSBuildThisFileDirectory)..\..\src\Swashbuckle.AspNetCore.Swagger\Swashbuckle.AspNetCore.Swagger.snk</AssemblyOriginatorKeyFile>
     <NoWarn>$(NoWarn);8002</NoWarn>
     <SignAssembly>true</SignAssembly>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Swashbuckle.AspNetCore.Newtonsoft.Test/Swashbuckle.AspNetCore.Newtonsoft.Test.csproj b/test/Swashbuckle.AspNetCore.Newtonsoft.Test/Swashbuckle.AspNetCore.Newtonsoft.Test.csproj
index ca6595b9f1..faa5492841 100644
--- a/test/Swashbuckle.AspNetCore.Newtonsoft.Test/Swashbuckle.AspNetCore.Newtonsoft.Test.csproj
+++ b/test/Swashbuckle.AspNetCore.Newtonsoft.Test/Swashbuckle.AspNetCore.Newtonsoft.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Swashbuckle.AspNetCore.SwaggerGen.Test/Swashbuckle.AspNetCore.SwaggerGen.Test.csproj b/test/Swashbuckle.AspNetCore.SwaggerGen.Test/Swashbuckle.AspNetCore.SwaggerGen.Test.csproj
index fb6e0e0b05..53896e0fea 100644
--- a/test/Swashbuckle.AspNetCore.SwaggerGen.Test/Swashbuckle.AspNetCore.SwaggerGen.Test.csproj
+++ b/test/Swashbuckle.AspNetCore.SwaggerGen.Test/Swashbuckle.AspNetCore.SwaggerGen.Test.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <NoWarn>1701;1702;1591</NoWarn>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
     <SignAssembly>True</SignAssembly>
     <AssemblyOriginatorKeyFile>$(MSBuildThisFileDirectory)..\..\src\Swashbuckle.AspNetCore.Swagger\Swashbuckle.AspNetCore.Swagger.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
diff --git a/test/Swashbuckle.AspNetCore.TestSupport/Swashbuckle.AspNetCore.TestSupport.csproj b/test/Swashbuckle.AspNetCore.TestSupport/Swashbuckle.AspNetCore.TestSupport.csproj
index dd04fa1bbc..885e8eb2b5 100644
--- a/test/Swashbuckle.AspNetCore.TestSupport/Swashbuckle.AspNetCore.TestSupport.csproj
+++ b/test/Swashbuckle.AspNetCore.TestSupport/Swashbuckle.AspNetCore.TestSupport.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <IsTestProject>false</IsTestProject>
     <VersionPrefix>1.0.0</VersionPrefix>
diff --git a/test/WebSites/Basic/Basic.csproj b/test/WebSites/Basic/Basic.csproj
index fa5d21fdd9..b2ce944870 100644
--- a/test/WebSites/Basic/Basic.csproj
+++ b/test/WebSites/Basic/Basic.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <NoWarn>$(NoWarn);1591</NoWarn>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/CliExample/CliExample.csproj b/test/WebSites/CliExample/CliExample.csproj
index 86f2f94752..29af653a45 100644
--- a/test/WebSites/CliExample/CliExample.csproj
+++ b/test/WebSites/CliExample/CliExample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
     <DotNetSwaggerPath>$([System.IO.Path]::Combine('$(ArtifactsPath)', 'bin', 'Swashbuckle.AspNetCore.Cli', '$(Configuration.ToLower())_$(TargetFramework)'))</DotNetSwaggerPath>
   </PropertyGroup>
 
diff --git a/test/WebSites/CliExampleWithFactory/CliExampleWithFactory.csproj b/test/WebSites/CliExampleWithFactory/CliExampleWithFactory.csproj
index 9cf5f7a21b..ad43d3d3be 100644
--- a/test/WebSites/CliExampleWithFactory/CliExampleWithFactory.csproj
+++ b/test/WebSites/CliExampleWithFactory/CliExampleWithFactory.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
     <DotNetSwaggerPath>$([System.IO.Path]::Combine('$(ArtifactsPath)', 'bin', 'Swashbuckle.AspNetCore.Cli', '$(Configuration.ToLower())_$(TargetFramework)'))</DotNetSwaggerPath>
   </PropertyGroup>
 
diff --git a/test/WebSites/ConfigFromFile/ConfigFromFile.csproj b/test/WebSites/ConfigFromFile/ConfigFromFile.csproj
index 25ceb0900b..1af5f19ef9 100644
--- a/test/WebSites/ConfigFromFile/ConfigFromFile.csproj
+++ b/test/WebSites/ConfigFromFile/ConfigFromFile.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/CustomDocumentSerializer/CustomDocumentSerializer.csproj b/test/WebSites/CustomDocumentSerializer/CustomDocumentSerializer.csproj
index 8300229ac3..858d03236e 100644
--- a/test/WebSites/CustomDocumentSerializer/CustomDocumentSerializer.csproj
+++ b/test/WebSites/CustomDocumentSerializer/CustomDocumentSerializer.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <DotNetSwaggerPath>$([System.IO.Path]::Combine('$(ArtifactsPath)', 'bin', 'Swashbuckle.AspNetCore.Cli', '$(Configuration)_$(TargetFramework)', 'dotnet-swagger.dll'))</DotNetSwaggerPath>
diff --git a/test/WebSites/CustomUIConfig/CustomUIConfig.csproj b/test/WebSites/CustomUIConfig/CustomUIConfig.csproj
index 97ee14eb9b..e49998db12 100644
--- a/test/WebSites/CustomUIConfig/CustomUIConfig.csproj
+++ b/test/WebSites/CustomUIConfig/CustomUIConfig.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/CustomUIIndex/CustomUIIndex.csproj b/test/WebSites/CustomUIIndex/CustomUIIndex.csproj
index edbd3feec5..7c55a49f33 100644
--- a/test/WebSites/CustomUIIndex/CustomUIIndex.csproj
+++ b/test/WebSites/CustomUIIndex/CustomUIIndex.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/GenericControllers/GenericControllers.csproj b/test/WebSites/GenericControllers/GenericControllers.csproj
index fbf4df6742..8d9690155b 100644
--- a/test/WebSites/GenericControllers/GenericControllers.csproj
+++ b/test/WebSites/GenericControllers/GenericControllers.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <NoWarn>$(NoWarn);1591</NoWarn>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/MinimalApp/MinimalApp.csproj b/test/WebSites/MinimalApp/MinimalApp.csproj
index 8300229ac3..858d03236e 100644
--- a/test/WebSites/MinimalApp/MinimalApp.csproj
+++ b/test/WebSites/MinimalApp/MinimalApp.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <DotNetSwaggerPath>$([System.IO.Path]::Combine('$(ArtifactsPath)', 'bin', 'Swashbuckle.AspNetCore.Cli', '$(Configuration)_$(TargetFramework)', 'dotnet-swagger.dll'))</DotNetSwaggerPath>
diff --git a/test/WebSites/MinimalAppWithHostedServices/MinimalAppWithHostedServices.csproj b/test/WebSites/MinimalAppWithHostedServices/MinimalAppWithHostedServices.csproj
index 5b6defe0c6..3408ed67d8 100644
--- a/test/WebSites/MinimalAppWithHostedServices/MinimalAppWithHostedServices.csproj
+++ b/test/WebSites/MinimalAppWithHostedServices/MinimalAppWithHostedServices.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <DotNetSwaggerPath>$([System.IO.Path]::Combine('$(ArtifactsPath)', 'bin', 'Swashbuckle.AspNetCore.Cli', '$(Configuration)_$(TargetFramework)', 'dotnet-swagger.dll'))</DotNetSwaggerPath>
diff --git a/test/WebSites/MultipleVersions/MultipleVersions.csproj b/test/WebSites/MultipleVersions/MultipleVersions.csproj
index 98d6a6ddcd..234e91d27f 100644
--- a/test/WebSites/MultipleVersions/MultipleVersions.csproj
+++ b/test/WebSites/MultipleVersions/MultipleVersions.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/NswagClientExample/NswagClientExample.csproj b/test/WebSites/NswagClientExample/NswagClientExample.csproj
index a829b4227c..4a6258da9d 100644
--- a/test/WebSites/NswagClientExample/NswagClientExample.csproj
+++ b/test/WebSites/NswagClientExample/NswagClientExample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
     <DotNetSwaggerPath>$([System.IO.Path]::Combine('$(ArtifactsPath)', 'bin', 'Swashbuckle.AspNetCore.Cli', '$(Configuration.ToLower())_$(TargetFramework)'))</DotNetSwaggerPath>
     <_NSwagTool>$(NSwagExe_Net60)</_NSwagTool>
     <_NSwagTool Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))">$(NSwagExe_Net80)</_NSwagTool>
diff --git a/test/WebSites/OAuth2Integration/OAuth2Integration.csproj b/test/WebSites/OAuth2Integration/OAuth2Integration.csproj
index ac9116ab50..91b86c2dae 100644
--- a/test/WebSites/OAuth2Integration/OAuth2Integration.csproj
+++ b/test/WebSites/OAuth2Integration/OAuth2Integration.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/ReDoc/ReDoc.csproj b/test/WebSites/ReDoc/ReDoc.csproj
index 3c229ad132..b3fa4cd596 100644
--- a/test/WebSites/ReDoc/ReDoc.csproj
+++ b/test/WebSites/ReDoc/ReDoc.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/TestFirst.IntegrationTests/TestFirst.IntegrationTests.csproj b/test/WebSites/TestFirst.IntegrationTests/TestFirst.IntegrationTests.csproj
index a17310c19b..86d88d1482 100644
--- a/test/WebSites/TestFirst.IntegrationTests/TestFirst.IntegrationTests.csproj
+++ b/test/WebSites/TestFirst.IntegrationTests/TestFirst.IntegrationTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/TestFirst/TestFirst.csproj b/test/WebSites/TestFirst/TestFirst.csproj
index 599d9144ea..b259fbf32a 100644
--- a/test/WebSites/TestFirst/TestFirst.csproj
+++ b/test/WebSites/TestFirst/TestFirst.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/TopLevelSwaggerDoc/TopLevelSwaggerDoc.csproj b/test/WebSites/TopLevelSwaggerDoc/TopLevelSwaggerDoc.csproj
index fd35c5d8fb..b64f64c4ec 100644
--- a/test/WebSites/TopLevelSwaggerDoc/TopLevelSwaggerDoc.csproj
+++ b/test/WebSites/TopLevelSwaggerDoc/TopLevelSwaggerDoc.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0</TargetFrameworks>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>