diff --git a/src/SourceBuild/tarball/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/DotNetHelper.cs b/src/SourceBuild/tarball/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/DotNetHelper.cs
index ae5508aa4..921ab1f97 100644
--- a/src/SourceBuild/tarball/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/DotNetHelper.cs
+++ b/src/SourceBuild/tarball/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/DotNetHelper.cs
@@ -96,7 +96,7 @@ internal class DotNetHelper
         }
     }
 
-    public void ExecuteCmd(string args, string? workingDirectory = null, Action<Process>? additionalProcessConfigCallback = null, int expectedExitCode = 0, int millisecondTimeout = -1)
+    public void ExecuteCmd(string args, string? workingDirectory = null, Action<Process>? additionalProcessConfigCallback = null, int? expectedExitCode = 0, int millisecondTimeout = -1)
     {
         (Process Process, string StdOut, string StdErr) executeResult = ExecuteHelper.ExecuteProcess(
             DotNetPath,
@@ -105,7 +105,9 @@ internal class DotNetHelper
             configure: (process) => configureProcess(process, workingDirectory),
             millisecondTimeout: millisecondTimeout);
         
-        ExecuteHelper.ValidateExitCode(executeResult, expectedExitCode);
+        if (expectedExitCode != null) {
+            ExecuteHelper.ValidateExitCode(executeResult, (int) expectedExitCode);
+        }
 
         void configureProcess(Process process, string? workingDirectory)
         {
diff --git a/src/SourceBuild/tarball/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/DotNetWatchTests.cs b/src/SourceBuild/tarball/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/DotNetWatchTests.cs
index 183311037..46013bbc7 100644
--- a/src/SourceBuild/tarball/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/DotNetWatchTests.cs
+++ b/src/SourceBuild/tarball/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/DotNetWatchTests.cs
@@ -19,12 +19,11 @@ public class DotNetWatchTests : SmokeTests
         string projectDirectory = DotNetHelper.ExecuteNew(DotNetTemplate.Console.GetName(), nameof(DotNetWatchTests));
         bool outputChanged = false;
 
-        // We expect an exit code of 143 (128 + 15, i.e. SIGTERM) because we are killing the process manually
         DotNetHelper.ExecuteCmd(
             "watch run",
             workingDirectory: projectDirectory,
             additionalProcessConfigCallback: processConfigCallback,
-            expectedExitCode: 143,
+            expectedExitCode: null, // The exit code does not reflect whether or not dotnet watch is working properly
             millisecondTimeout: 30000);
 
         Assert.True(outputChanged);
@@ -52,7 +51,7 @@ public class DotNetWatchTests : SmokeTests
                 {
                     outputChanged = true;
                     OutputHelper.WriteLine("Successfully re-ran program after code change.");
-                    ExecuteHelper.ExecuteProcessValidateExitCode("kill", $"-s TERM {process.Id}", OutputHelper);
+                    process.Kill(true);
                 }
             });
         }