diff --git a/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/DirectoryInfo/CreateSubdirectory.cs b/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/DirectoryInfo/CreateSubdirectory.cs
index f16bd0c1617f73..bdfe078262cef6 100644
--- a/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/DirectoryInfo/CreateSubdirectory.cs
+++ b/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/DirectoryInfo/CreateSubdirectory.cs
@@ -244,8 +244,8 @@ public void CreateSubdirectory_RootDriveSubfolder_Windows()
         }
 
         [Fact]
-        [PlatformSpecific(TestPlatforms.Linux)]
-        public void CreateSubdirectory_RootDriveSubfolder_ThrowsUnauthorizedAccessException_Linux()
+        [PlatformSpecific(TestPlatforms.AnyUnix)]
+        public void CreateSubdirectory_RootDriveSubfolder_ThrowsUnauthorizedAccessException_Unix()
         {
             DirectoryInfo rootDirectory = new DirectoryInfo("/");
             string testFolderName = GetTestFileName();