diff --git a/Test/Flurl.Test/CommonExtensionsTests.cs b/Test/Flurl.Test/CommonExtensionsTests.cs
index 0f54d3a..9621761 100644
--- a/Test/Flurl.Test/CommonExtensionsTests.cs
+++ b/Test/Flurl.Test/CommonExtensionsTests.cs
@@ -6,7 +6,7 @@ using Flurl.Util;
 
 namespace Flurl.Test
 {
-	[TestFixture]
+	[TestFixture, Parallelizable]
 	public class CommonExtensionsTests
 	{
 		[Test]
diff --git a/Test/Flurl.Test/Http/ClientConfigTests.cs b/Test/Flurl.Test/Http/ClientConfigTests.cs
index beab60b..49d2e6d 100644
--- a/Test/Flurl.Test/Http/ClientConfigTests.cs
+++ b/Test/Flurl.Test/Http/ClientConfigTests.cs
@@ -10,7 +10,7 @@ using NUnit.Framework;
 
 namespace Flurl.Test.Http
 {
-    [TestFixture]
+    [TestFixture, Parallelizable]
     public class ClientConfigTestsBase //: ConfigTestsBase
     {
 	    //private FlurlClient _client = new FlurlClient();
diff --git a/Test/Flurl.Test/Http/GetTests.cs b/Test/Flurl.Test/Http/GetTests.cs
index 5b8e069..e249636 100644
--- a/Test/Flurl.Test/Http/GetTests.cs
+++ b/Test/Flurl.Test/Http/GetTests.cs
@@ -9,7 +9,7 @@ using NUnit.Framework;
 
 namespace Flurl.Test.Http
 {
-	[TestFixture]
+	[TestFixture, Parallelizable]
 	public class GetTests : HttpTestFixtureBase
 	{
 		[Test]
diff --git a/Test/Flurl.Test/Http/GlobalConfigTests.cs b/Test/Flurl.Test/Http/GlobalConfigTests.cs
index 4190a8b..6a321c9 100644
--- a/Test/Flurl.Test/Http/GlobalConfigTests.cs
+++ b/Test/Flurl.Test/Http/GlobalConfigTests.cs
@@ -12,7 +12,6 @@ namespace Flurl.Test.Http
 	/// All global settings can also be set at the client level, so this base class allows ClientConfigTests to 
 	/// inherit all the same tests.
 	/// </summary>
-	[Parallelizable]
 	public abstract class ConfigTestsBase
 	{
 		protected abstract FlurlHttpSettings GetSettings();
@@ -135,7 +134,7 @@ namespace Flurl.Test.Http
 		private class SomeCustomMessageHandler : HttpClientHandler { }
 	}
 
-	//[TestFixture]
+	//[TestFixture, Parallelizable]
 	//public class GlobalConfigTestsBase : ConfigTestsBase
 	//{
 	//	protected override FlurlHttpSettings GetSettings() {
diff --git a/Test/Flurl.Test/Http/HeadTests.cs b/Test/Flurl.Test/Http/HeadTests.cs
index 851ac1a..3189875 100644
--- a/Test/Flurl.Test/Http/HeadTests.cs
+++ b/Test/Flurl.Test/Http/HeadTests.cs
@@ -6,7 +6,7 @@ using NUnit.Framework;
 
 namespace Flurl.Test.Http
 {
-	[TestFixture]
+	[TestFixture, Parallelizable]
 	public class HeadTests : HttpTestFixtureBase
 	{
 		[Test]
diff --git a/Test/Flurl.Test/Http/HttpTestFixtureBase.cs b/Test/Flurl.Test/Http/HttpTestFixtureBase.cs
index ce03aa6..5cadba8 100644
--- a/Test/Flurl.Test/Http/HttpTestFixtureBase.cs
+++ b/Test/Flurl.Test/Http/HttpTestFixtureBase.cs
@@ -6,7 +6,6 @@ using NUnit.Framework;
 
 namespace Flurl.Test.Http
 {
-	[Parallelizable]
 	public abstract class HttpTestFixtureBase
 	{
 		protected HttpTest HttpTest { get; private set; }
diff --git a/Test/Flurl.Test/Http/PostTests.cs b/Test/Flurl.Test/Http/PostTests.cs
index 60c9c4a..4020744 100644
--- a/Test/Flurl.Test/Http/PostTests.cs
+++ b/Test/Flurl.Test/Http/PostTests.cs
@@ -5,7 +5,7 @@ using NUnit.Framework;
 
 namespace Flurl.Test.Http
 {
-	[TestFixture]
+	[TestFixture, Parallelizable]
 	public class PostTests : HttpTestFixtureBase
 	{
 		[Test]
diff --git a/Test/Flurl.Test/Http/TestingTests.cs b/Test/Flurl.Test/Http/TestingTests.cs
index 2b253d0..ab49c64 100644
--- a/Test/Flurl.Test/Http/TestingTests.cs
+++ b/Test/Flurl.Test/Http/TestingTests.cs
@@ -9,7 +9,7 @@ using NUnit.Framework;
 
 namespace Flurl.Test.Http
 {
-	[TestFixture]
+	[TestFixture, Parallelizable]
 	public class TestingTests : HttpTestFixtureBase
 	{
 		[Test]
diff --git a/Test/Flurl.Test/UrlBuilderTests.cs b/Test/Flurl.Test/UrlBuilderTests.cs
index 66db08e..66b136d 100644
--- a/Test/Flurl.Test/UrlBuilderTests.cs
+++ b/Test/Flurl.Test/UrlBuilderTests.cs
@@ -8,7 +8,7 @@ using NUnit.Framework;
 
 namespace Flurl.Test
 {
-	[TestFixture]
+	[TestFixture, Parallelizable]
 	public class UrlBuilderTests
 	{
 		[Test]