diff --git a/src/Tasks/Microsoft.NET.Build.Tasks.UnitTests/ProcessFrameworkReferencesTests.cs b/src/Tasks/Microsoft.NET.Build.Tasks.UnitTests/ProcessFrameworkReferencesTests.cs
index b9806916dfcc..bfa497b8d6fa 100644
--- a/src/Tasks/Microsoft.NET.Build.Tasks.UnitTests/ProcessFrameworkReferencesTests.cs
+++ b/src/Tasks/Microsoft.NET.Build.Tasks.UnitTests/ProcessFrameworkReferencesTests.cs
@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.IO;
 using FluentAssertions;
 using Xunit;
@@ -166,6 +167,11 @@ public void Given_KnownFrameworkReferences_with_RuntimeCopyLocal_It_resolves_Fra
                 }
             };
 
+            if (Environment.OSVersion.Platform != PlatformID.Win32NT)
+            {
+                task.Execute().Should().BeFalse("IsWindowsOnly=true");
+                return;
+            }
             task.Execute().Should().BeTrue();
 
             task.PackagesToDownload.Length.Should().Be(1);
@@ -241,10 +247,16 @@ public void It_resolves_self_contained_FrameworkReferences_to_download()
                         }),
                 }
             };
+            if (Environment.OSVersion.Platform == PlatformID.Win32NT)
+            {
+                task.Execute().Should().BeTrue();
 
-            task.Execute().Should().BeTrue();
-
-            task.PackagesToDownload.Length.Should().Be(2);
+                task.PackagesToDownload.Length.Should().Be(2);
+            }
+            else
+            {
+                task.Execute().Should().BeFalse("IsWindowsOnly=true");
+            }
         }
     }
 }