diff --git a/src/Tests/Microsoft.DotNet.PackageInstall.Tests/ToolPackageInstallerNugetCacheTests.cs b/src/Tests/Microsoft.DotNet.PackageInstall.Tests/ToolPackageInstallerNugetCacheTests.cs
index 3aedbf9a3a98..263b8d3bba6e 100644
--- a/src/Tests/Microsoft.DotNet.PackageInstall.Tests/ToolPackageInstallerNugetCacheTests.cs
+++ b/src/Tests/Microsoft.DotNet.PackageInstall.Tests/ToolPackageInstallerNugetCacheTests.cs
@@ -18,7 +18,7 @@ public ToolPackageInstallToManagedLocationInstaller(ITestOutputHelper log) : bas
         {
         }
 
-        [Theory]
+        [WindowsOnlyTheory]
         [InlineData(false)]
         [InlineData(true)]
         public void GivenNugetConfigInstallSucceeds(bool testMockBehaviorIsInSync)
@@ -61,7 +61,7 @@ public void GivenNugetConfigInstallSucceeds(bool testMockBehaviorIsInSync)
             }
         }
 
-        [Theory]
+        [WindowsOnlyTheory]
         [InlineData(false)]
         [InlineData(true)]
         public void GivenNugetConfigVersionRangeInstallSucceeds(bool testMockBehaviorIsInSync)
diff --git a/src/Tests/Microsoft.DotNet.PackageInstall.Tests/ToolPackageUninstallerTests.cs b/src/Tests/Microsoft.DotNet.PackageInstall.Tests/ToolPackageUninstallerTests.cs
index 4e5750f81d61..21c0f99477e8 100644
--- a/src/Tests/Microsoft.DotNet.PackageInstall.Tests/ToolPackageUninstallerTests.cs
+++ b/src/Tests/Microsoft.DotNet.PackageInstall.Tests/ToolPackageUninstallerTests.cs
@@ -15,7 +15,7 @@ namespace Microsoft.DotNet.PackageInstall.Tests
 {
     public class ToolPackageUninstallerTests : SdkTest
     {
-        [Theory]
+        [WindowsOnlyTheory]
         [InlineData(false)]
         [InlineData(true)]
         public void GivenAnInstalledPackageUninstallRemovesThePackage(bool testMockBehaviorIsInSync)