diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 1b51116d0..f44e9e0c7 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -28,6 +28,8 @@ resources:
 extends:
   template: azure-pipelines/MicroBuild.1ES.Official.yml@MicroBuildTemplate
   parameters:
+    settings:
+      networkIsolationPolicy: Permissive,CFSClean
     sdl:
       sourceAnalysisPool:
         name: $(DncEngInternalBuildPool)
diff --git a/test/Scaffolding/Shared/TemporaryFileProvider.cs b/test/Scaffolding/Shared/TemporaryFileProvider.cs
index 2e6983599..52ff94daa 100644
--- a/test/Scaffolding/Shared/TemporaryFileProvider.cs
+++ b/test/Scaffolding/Shared/TemporaryFileProvider.cs
@@ -10,8 +10,13 @@ namespace Microsoft.VisualStudio.Web.CodeGeneration
 {
     internal class TemporaryFileProvider : PhysicalFileProvider
     {
+        public TemporaryFileProvider(string tmpPathRoot)
+            : base(Directory.CreateDirectory(Path.Combine(tmpPathRoot, "tmpFiles", Guid.NewGuid().ToString())).FullName)
+        {
+        }
+
         public TemporaryFileProvider()
-            : base(Directory.CreateDirectory(Path.Combine(Path.GetTempPath(), "tmpfiles", Guid.NewGuid().ToString())).FullName)
+            : this(Path.GetTempPath())
         {
         }
 
diff --git a/test/Scaffolding/VS.Web.CG.MSBuild.Test/ProjectContextWriterTests.cs b/test/Scaffolding/VS.Web.CG.MSBuild.Test/ProjectContextWriterTests.cs
index 18c528b62..f21bc7720 100644
--- a/test/Scaffolding/VS.Web.CG.MSBuild.Test/ProjectContextWriterTests.cs
+++ b/test/Scaffolding/VS.Web.CG.MSBuild.Test/ProjectContextWriterTests.cs
@@ -2,9 +2,12 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
+using System.CodeDom;
 using System.IO;
 using System.Linq;
+using System.Reflection;
 using System.Runtime.InteropServices;
+using Microsoft.Build.Tasks;
 using Microsoft.DotNet.Scaffolding.Shared;
 using Microsoft.VisualStudio.Web.CodeGeneration.Msbuild;
 using Xunit;
@@ -80,7 +83,7 @@ public void TestProjectContextWithReferencedModel()
         [Fact]
         public void TestProjectContextNullableDisabled()
         {
-            using (var fileProvider = new TemporaryFileProvider())
+            using (var fileProvider = new TemporaryFileProvider(GetCurrentAssemblyPath()))
             {
                 new MsBuildProjectSetupHelper().SetupCodeGenerationProjectNullableDisabled(fileProvider, _outputHelper);
                 var path = Path.Combine(fileProvider.Root, MsBuildProjectStrings.RootProjectName2);
@@ -94,20 +97,20 @@ public void TestProjectContextNullableDisabled()
         [Fact]
         public void TestProjectContextNullableMissing()
         {
-            using (var fileProvider = new TemporaryFileProvider())
+            using (var fileProvider = new TemporaryFileProvider(GetCurrentAssemblyPath()))
             {
                 new MsBuildProjectSetupHelper().SetupCodeGenerationProjectNullableMissing(fileProvider, _outputHelper);
                 var path = Path.Combine(fileProvider.Root, MsBuildProjectStrings.RootProjectName3);
 
                 var projectContext = GetProjectContext(path, true);
-                Assert.Null(projectContext.Nullable);
+                Assert.Equal("enable", projectContext.Nullable);
             }
         }
 
         [Fact]
         public void TestProjectContextNullableEnabled()
         {
-            using (var fileProvider = new TemporaryFileProvider())
+            using (var fileProvider = new TemporaryFileProvider(GetCurrentAssemblyPath()))
             {
                 new MsBuildProjectSetupHelper().SetupCodeGenerationProjectNullableEnabled(fileProvider, _outputHelper);
                 var path = Path.Combine(fileProvider.Root, MsBuildProjectStrings.RootProjectName3);
@@ -171,5 +174,10 @@ public void GetXmlKeyValueTests()
             Assert.Equal("", emptyValue, ignoreCase: true);
             Assert.Equal("", nullValue, ignoreCase: true);
         }
+
+        private static string GetCurrentAssemblyPath()
+        {
+            return Path.GetDirectoryName(typeof(ProjectContextWriterTests).GetType().Assembly.Location);
+        }
     }
 }