diff --git a/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/FileVersionInfoTest.cs b/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/FileVersionInfoTest.cs
index bea5e9ad912fb8..6203898cd9c1ec 100644
--- a/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/FileVersionInfoTest.cs
+++ b/src/libraries/System.Diagnostics.FileVersionInfo/tests/System.Diagnostics.FileVersionInfo.Tests/FileVersionInfoTest.cs
@@ -11,7 +11,7 @@ public partial class FileVersionInfoTest : FileCleanupTestBase
     {
         private const string TestAssemblyFileName = "System.Diagnostics.FileVersionInfo.TestAssembly.dll";
         // On Unix the internal name's extension is .exe if OutputType is exe even though the TargetExt is .dll.
-        private readonly string OriginalTestAssemblyInternalName = PlatformDetection.IsWindows ?
+        private readonly string OriginalTestAssemblyInternalName = OperatingSystem.IsWindows() ?
             "System.Diagnostics.FileVersionInfo.TestAssembly.dll" :
             "System.Diagnostics.FileVersionInfo.TestAssembly.exe";
         private const string TestCsFileName = "Assembly1.cs";