Change checks for exception message

src/libraries/System.Diagnostics.Process/tests/ProcessTests.cs

@@ -24,8 +24,6 @@ namespace System.Diagnostics.Tests
     [ActiveIssue("https://github.com/dotnet/runtime/issues/49568", typeof(PlatformDetection), nameof(PlatformDetection.IsMacOsAppleSilicon))]
     public partial class ProcessTests : ProcessTestBase
     {
-        private const string FailedToStartExpectedRegexPattern = "Failed to start '.*' with working directory '.*'\\.";
-
         private class FinalizingProcess : Process
         {
             public static volatile bool WasFinalized;
@@ -219,7 +217,8 @@ public void TestStartWithBadWorkingDirectory()
 
                 Win32Exception e = Assert.Throws<Win32Exception>(() => Process.Start(psi));
                 Assert.NotEqual(0, e.NativeErrorCode);
-                Assert.Matches(FailedToStartExpectedRegexPattern + " The directory name is invalid\\.", e.Message);
+                Assert.Contains(program, e.Message);
+                Assert.Contains(workingDirectory, e.Message);
             }
             else
             {
@@ -233,7 +232,7 @@ public void ProcessStart_UseShellExecute_OnWindows_OpenMissingFile_Throws()
         {
             string fileToOpen = Path.Combine(Environment.CurrentDirectory, "_no_such_file.TXT");
             Win32Exception e = Assert.Throws<Win32Exception>(() => Process.Start(new ProcessStartInfo { UseShellExecute = true, FileName = fileToOpen }));
-            Assert.Matches(FailedToStartExpectedRegexPattern + " The system cannot find the file specified\\.", e.Message);
+            Assert.Contains(fileToOpen, e.Message);
         }
 
         [ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.HasWindowsShell))]
@@ -1395,7 +1394,7 @@ public void TestStartWithMissingFile(bool fullPath)
 
             Win32Exception e = Assert.Throws<Win32Exception>(() => Process.Start(path));
             Assert.NotEqual(0, e.NativeErrorCode);
-            Assert.Matches(FailedToStartExpectedRegexPattern + " The system cannot find the file specified\\.", e.Message);
+            Assert.Contains(path, e.Message);
         }
 
         [Fact]