diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index e9901862..b67c0766 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -69,10 +69,29 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
 
+      - name: Set up Dev Drive
+        uses: samypr100/setup-dev-drive@v4
+        with:
+          workspace-copy: true
+          trusted-dev-drive: true
+          drive-size: 6GB
+
+      - name: Use Dev Drive for NuGet packages
+        shell: pwsh
+        run: |
+          $packages = if ($env:NUGET_PACKAGES) {
+            $env:NUGET_PACKAGES
+          } else {
+            Join-Path $env:DEV_DRIVE 'nuget\global-packages'
+          }
+          New-Item -ItemType Directory -Force -Path $packages | Out-Null
+          "NUGET_PACKAGES=$packages" >> $env:GITHUB_ENV
+
       - name: Set up runner
         uses: ./.github/actions/setup-runner
 
       - name: Run tests
+        working-directory: ${{ env.DEV_DRIVE_WORKSPACE }}
         run: >
           dotnet run
           --project ./build/_build.csproj
@@ -82,11 +101,13 @@ jobs:
           --platform win_x64
 
       - name: Display test results
+        working-directory: ${{ env.DEV_DRIVE_WORKSPACE }}
         continue-on-error: true
         if: always()
         run: dotnet trx --verbosity normal
 
       - name: Check for warnings
+        working-directory: ${{ env.DEV_DRIVE_WORKSPACE }}
         run: >
           dotnet run
           --project ./build/_build.csproj
diff --git a/src/Cli.E2ETests.General/Installation/InstallPsTests.Success.cs b/src/Cli.E2ETests.General/Installation/InstallPsTests.Success.cs
index 871d733f..f93f5f72 100644
--- a/src/Cli.E2ETests.General/Installation/InstallPsTests.Success.cs
+++ b/src/Cli.E2ETests.General/Installation/InstallPsTests.Success.cs
@@ -237,6 +237,7 @@ public async Task InstallCreatesDirectoryIfMissing( string shell ) {
 
   [TestCase( "pwsh" )]
   [TestCase( "powershell" )]
+  [NonParallelizable]
   public async Task InstallAddsToUserPath( string shell ) {
     var tempDir = Path.GetTempPath();
     var installDir = Path.Combine( tempDir, "drift-install-ps-path-" + Guid.NewGuid() );
@@ -280,6 +281,7 @@ public async Task InstallAddsToUserPath( string shell ) {
 
   [TestCase( "pwsh" )]
   [TestCase( "powershell" )]
+  [NonParallelizable]
   public async Task InstallDoesNotDuplicateInUserPath( string shell ) {
     var tempDir = Path.GetTempPath();
     var installDir = Path.Combine( tempDir, "drift-install-ps-nodup-" + Guid.NewGuid() );
diff --git a/src/Cli.E2ETests.General/Installation/InstallPsTests.cs b/src/Cli.E2ETests.General/Installation/InstallPsTests.cs
index 8c38cd82..81c7d914 100644
--- a/src/Cli.E2ETests.General/Installation/InstallPsTests.cs
+++ b/src/Cli.E2ETests.General/Installation/InstallPsTests.cs
@@ -3,6 +3,7 @@
 namespace Drift.Cli.E2ETests.General.Installation;
 
 [Platform( "Win" )]
+[Parallelizable( ParallelScope.Children )]
 internal sealed partial class InstallPsTests {
   private const int ScriptExitCodeSuccess = 0;
   private const int ScriptExitCodeFailure = 1;