diff --git a/tests/xharness/Harness.cs b/tests/xharness/Harness.cs
index f38d4b7c534a..b8d4fec6e200 100644
--- a/tests/xharness/Harness.cs
+++ b/tests/xharness/Harness.cs
@@ -207,6 +207,7 @@ string MlaunchPath {
 		public bool INCLUDE_XAMARIN_LEGACY { get; }
 		public string SYSTEM_MONO { get; set; }
 		public string DOTNET_DIR { get; set; }
+		public string DotNetTfm { get; set; }
 
 		// Run
 
@@ -284,6 +285,7 @@ public Harness (IResultParser resultParser, HarnessAction action, HarnessConfigu
 			SYSTEM_MONO = config ["SYSTEM_MONO"];
 			DOTNET_DIR = config ["DOTNET_DIR"];
 			INCLUDE_XAMARIN_LEGACY = config.ContainsKey ("INCLUDE_XAMARIN_LEGACY") && !string.IsNullOrEmpty (config ["INCLUDE_XAMARIN_LEGACY"]);
+			DotNetTfm = config ["DOTNET_TFM"];
 
 			if (string.IsNullOrEmpty (SdkRoot))
 				SdkRoot = config ["XCODE_DEVELOPER_ROOT"] ?? configuration.SdkRoot;
diff --git a/tests/xharness/IHarness.cs b/tests/xharness/IHarness.cs
index c16339799415..634b1a709e26 100644
--- a/tests/xharness/IHarness.cs
+++ b/tests/xharness/IHarness.cs
@@ -64,6 +64,7 @@ public interface IHarness {
 		bool UseGroupedApps { get; }
 		string VSDropsUri { get; }
 		bool DisableWatchOSOnWrench { get; }
+		string DotNetTfm { get; }
 
 		#endregion
 
diff --git a/tests/xharness/Targets/Target.cs b/tests/xharness/Targets/Target.cs
index 069359daaedb..7f186847be74 100644
--- a/tests/xharness/Targets/Target.cs
+++ b/tests/xharness/Targets/Target.cs
@@ -65,7 +65,7 @@ public abstract class Target {
 
 		public const string FSharpGuid = "{F2A71F9B-5D33-465A-A702-920D77279786}";
 		public const string CSharpGuid = "{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}";
-		public const string DotNetTfm = "net7.0";
+		public string DotNetTfm => Harness.DotNetTfm;
 
 		public string LanguageGuid { get { return IsFSharp ? FSharpGuid : CSharpGuid; } }