diff --git a/Documentation/ArcadeSdk.md b/Documentation/ArcadeSdk.md
index 6debd5f1dcd..c5d559171bb 100644
--- a/Documentation/ArcadeSdk.md
+++ b/Documentation/ArcadeSdk.md
@@ -815,3 +815,13 @@ msbuild Project.UnitTests.csproj /p:TestTargetFrameworks=net472 /p:TestRuntime=M
 ### `TestRunnerAdditionalArguments` (string)
 
 Additional command line arguments passed to the test runner (e.g. `xunit.console.exe`).
+
+### 'TestRuntimeAdditionalArguments' (string)
+
+Additional command line arguments passed to the test runtime (i.e. `dotnet` or `mono`). Applicable only when `TestRuntime` is `Core` or `Mono`. 
+
+For example, to invoke Mono with debug flags `--debug` (to get stack traces with line number information), set `TestRuntimeAdditionalArguments` to `--debug`.
+To override the default Shared Framework version that is selected based on the test project TFM, set `TestRuntimeAdditionalArguments` to `--fx-version x.y.z`.
+
+
+
diff --git a/src/Microsoft.DotNet.Arcade.Sdk/tools/XUnit/XUnit.targets b/src/Microsoft.DotNet.Arcade.Sdk/tools/XUnit/XUnit.targets
index e345b6c37ef..b0f98d65d17 100644
--- a/src/Microsoft.DotNet.Arcade.Sdk/tools/XUnit/XUnit.targets
+++ b/src/Microsoft.DotNet.Arcade.Sdk/tools/XUnit/XUnit.targets
@@ -48,7 +48,7 @@
       <_CoreRuntimeConfigPath>$(_TargetDir)$(_TargetFileNameNoExt).runtimeconfig.json</_CoreRuntimeConfigPath>
       <_CoreDepsPath>$(_TargetDir)$(_TargetFileNameNoExt).deps.json</_CoreDepsPath>
       <_TestRunner>$(DotNetTool)</_TestRunner>
-      <_TestRunnerArgs>exec --depsfile "$(_CoreDepsPath)" --runtimeconfig "$(_CoreRuntimeConfigPath)" "$(NuGetPackageRoot)xunit.runner.console/$(XUnitVersion)/tools/$(_TestRunnerTargetFramework)/xunit.console.dll" "$(_TestAssembly)" -noautoreporters -xml "%(TestToRun.ResultsXmlPath)" -html "%(TestToRun.ResultsHtmlPath)" $(_TestRunnerAdditionalArguments)</_TestRunnerArgs>
+      <_TestRunnerArgs>exec --depsfile "$(_CoreDepsPath)" --runtimeconfig "$(_CoreRuntimeConfigPath)" $(TestRuntimeAdditionalArguments) "$(NuGetPackageRoot)xunit.runner.console/$(XUnitVersion)/tools/$(_TestRunnerTargetFramework)/xunit.console.dll" "$(_TestAssembly)" -noautoreporters -xml "%(TestToRun.ResultsXmlPath)" -html "%(TestToRun.ResultsHtmlPath)" $(_TestRunnerAdditionalArguments)</_TestRunnerArgs>
     </PropertyGroup>
 
     <PropertyGroup Condition="'$(_TestRuntime)' != 'Core'">
@@ -57,7 +57,7 @@
       <_XUnitConsoleExePath>$(NuGetPackageRoot)xunit.runner.console\$(XUnitVersion)\tools\$(_TestRunnerTargetFramework)\$(_XUnitConsoleExe)</_XUnitConsoleExePath>
 
       <_TestRunnerArgs>"$(_TestAssembly)" -noshadow -xml "%(TestToRun.ResultsXmlPath)" -html "%(TestToRun.ResultsHtmlPath)" $(_TestRunnerAdditionalArguments)</_TestRunnerArgs>
-      <_TestRunnerArgs Condition="'$(_TestRuntime)' == 'Mono'">$(MonoToolArgs) "$(_XUnitConsoleExePath)" $(_TestRunnerArgs)</_TestRunnerArgs>
+      <_TestRunnerArgs Condition="'$(_TestRuntime)' == 'Mono'">$(TestRuntimeAdditionalArguments) "$(_XUnitConsoleExePath)" $(_TestRunnerArgs)</_TestRunnerArgs>
 
       <_TestRunner Condition="'$(_TestRuntime)' == 'Mono'">$(MonoTool)</_TestRunner>
       <_TestRunner Condition="'$(_TestRuntime)' != 'Mono'">$(_XUnitConsoleExePath)</_TestRunner>