diff --git a/Source/IntegrationTests/LitTests.cs b/Source/IntegrationTests/LitTests.cs
index 0f559ce7d50..b91a4b5fa44 100644
--- a/Source/IntegrationTests/LitTests.cs
+++ b/Source/IntegrationTests/LitTests.cs
@@ -136,6 +136,8 @@ IEnumerable<string> AddExtraArgs(IEnumerable<string> args, IEnumerable<string> l
           "%mv", (args, config) => MvCommand.Parse(args.ToArray())
         }, {
           "%rm", (args, config) => RmCommand.Parse(args.ToArray())
+        }, {
+          "%cp", (args, config) => CpCommand.Parse(args.ToArray())
         }, {
           "%OutputCheck", OutputCheckCommand.Parse
         }
diff --git a/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/DerivedModule.dfy b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/DerivedModule.dfy
index 696c15acf2d..b95ecb1d1b1 100644
--- a/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/DerivedModule.dfy
+++ b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/DerivedModule.dfy
@@ -1,7 +1,8 @@
 // RUN: %baredafny translate go  --go-module-name=GoModule2 --library="%S/test.doo" --translation-record "%S/test-go.dtr" --output "%S/test3" "%s"
-// RUN: cp -r "%S/go.*" "%S/test3-go/"
-// RUN: cp -r "%S/../../../../../../../../../DafnyRuntime/DafnyRuntimeGo-gomod" "%S"
-// RUN: cp -r "%S/DafnyModule1" "%S/test3-go/"
+// RUN: %cp -rf "%S/go.mod" "%S/test3-go/go.mod"
+// RUN: %cp -rf "%S/go.sum" "%S/test3-go/go.sum"
+// RUN: %cp -rf "%S/../../../../../../../../../DafnyRuntime/DafnyRuntimeGo-gomod" "%S"
+// RUN: %cp -rf "%S/DafnyModule1" "%S/test3-go/"
 // RUN: go run -C %S/test3-go/ test3.go > %t
 // RUN: %diff "%s.expect" "%t"
 module DafnyModule3 {
diff --git a/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/dafnysource/helloworld.dfy b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/dafnysource/helloworld.dfy
new file mode 100644
index 00000000000..75e0ff227c4
--- /dev/null
+++ b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/dafnysource/helloworld.dfy
@@ -0,0 +1,9 @@
+// This file is used to regenerate PythonModule1.doo
+// RUN: echo 'lit should ignore this file' 
+
+module DafnyModule1 {
+  method HelloWorld()
+  {
+    print "Hello World";
+  }
+}
diff --git a/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/test-go.dtr b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/test-go.dtr
index c09c81885fb..d9d364ca0a9 100644
--- a/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/test-go.dtr
+++ b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/test-go.dtr
@@ -1,4 +1,4 @@
 file_format_version = "1.0"
-dafny_version = "4.7.0.0"
+dafny_version = "4.8.0.0"
 [options_by_module.DafnyModule1]
 go-module-name = "GoModule1"
diff --git a/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/test.doo b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/test.doo
index ce95bf59f7b..507fc7e0335 100644
Binary files a/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/test.doo and b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/multimodule/test.doo differ
diff --git a/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/singlemodule/dafnysource/helloworld.dfy b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/singlemodule/dafnysource/helloworld.dfy
index 3b364b53539..07344c82f78 100644
--- a/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/singlemodule/dafnysource/helloworld.dfy
+++ b/Source/IntegrationTests/TestFiles/LitTests/LitTest/gomodule/singlemodule/dafnysource/helloworld.dfy
@@ -1,6 +1,7 @@
 // RUN: %baredafny translate go  --go-module-name=GoModule1 "%s" --output "%S/test"
-// RUN: cp -r "%S/go.*" "%S/test-go/"
-// RUN: cp -r "%S/../../../../../../../../../../DafnyRuntime/DafnyRuntimeGo-gomod" "%S"
+// RUN: %cp -rf "%S/go.mod" "%S/test-go/go.mod"
+// RUN: %cp -rf "%S/go.sum" "%S/test-go/go.sum"
+// RUN: %cp -rf "%S/../../../../../../../../../../DafnyRuntime/DafnyRuntimeGo-gomod" "%S"
 // RUN: go run -C %S/test-go/ test.go > %t
 // RUN: %diff "%s.expect" "%t"
 module DafnyModule1 {
diff --git a/Source/IntegrationTests/TestFiles/LitTests/LitTest/pythonmodule/multimodule/PythonModule1.doo b/Source/IntegrationTests/TestFiles/LitTests/LitTest/pythonmodule/multimodule/PythonModule1.doo
index 73cac5cbf23..d02fd1ee749 100644
Binary files a/Source/IntegrationTests/TestFiles/LitTests/LitTest/pythonmodule/multimodule/PythonModule1.doo and b/Source/IntegrationTests/TestFiles/LitTests/LitTest/pythonmodule/multimodule/PythonModule1.doo differ
diff --git a/Source/IntegrationTests/TestFiles/LitTests/LitTest/pythonmodule/nestedmodule/SomeNestedModule.doo b/Source/IntegrationTests/TestFiles/LitTests/LitTest/pythonmodule/nestedmodule/SomeNestedModule.doo
index df92ea9bec1..984fce8d142 100644
Binary files a/Source/IntegrationTests/TestFiles/LitTests/LitTest/pythonmodule/nestedmodule/SomeNestedModule.doo and b/Source/IntegrationTests/TestFiles/LitTests/LitTest/pythonmodule/nestedmodule/SomeNestedModule.doo differ
diff --git a/Source/XUnitExtensions/Lit/CpCommand.cs b/Source/XUnitExtensions/Lit/CpCommand.cs
new file mode 100644
index 00000000000..c210dbb83ed
--- /dev/null
+++ b/Source/XUnitExtensions/Lit/CpCommand.cs
@@ -0,0 +1,109 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Xunit;
+using Xunit.Abstractions;
+using Xunit.Sdk;
+
+namespace XUnitExtensions.Lit {
+  public class CpCommand : ILitCommand {
+
+    private readonly string options;
+    private readonly string fileOrFolder;
+    private readonly string destination;
+
+    private CpCommand(string options, string fileOrFolder, string destination) {
+      this.options = options;
+      this.fileOrFolder = fileOrFolder;
+      this.destination = destination;
+    }
+
+    public static ILitCommand Parse(string[] args) {
+      if (args.Length != 2 && args.Length != 3) {
+        throw new ArgumentException($"Wrong number of arguments for cp, expected 2 or 3 but got {args.Length}: " + string.Join(", ", args));
+      }
+
+      string fileOrFolder;
+      string destination;
+      string options;
+
+      if (args.Length == 2) {
+        options = "";
+        fileOrFolder = args[0];
+        destination = args[1];
+      } else {
+        options = args[0];
+        fileOrFolder = args[1];
+        destination = args[2];
+      }
+      return new CpCommand(options, fileOrFolder, destination);
+    }
+    static void CopyDirectory(string sourceDir, string destinationDir, bool recursive, bool force)
+    {
+      // Get information about the source directory
+      var dir = new DirectoryInfo(sourceDir);
+
+      // Check if the source directory exists
+      if (!dir.Exists)
+        throw new DirectoryNotFoundException($"Source directory not found: {dir.FullName}");
+
+      // Cache directories before we start copying
+      DirectoryInfo[] dirs = dir.GetDirectories();
+
+      // Create the destination directory
+      Directory.CreateDirectory(destinationDir);
+
+      // Get the files in the source directory and copy to the destination directory
+      foreach (FileInfo file in dir.GetFiles())
+      {
+        string targetFilePath = Path.Combine(destinationDir, file.Name);
+        if (force && File.Exists(targetFilePath)) {
+          File.Delete(targetFilePath);
+        }
+        file.CopyTo(targetFilePath);
+      }
+
+      // If recursive and copying subdirectories, recursively call this method
+      if (recursive) {
+        foreach (DirectoryInfo subDir in dirs) {
+          string newDestinationDir = Path.Combine(destinationDir, subDir.Name);
+          CopyDirectory(subDir.FullName, newDestinationDir, true, force);
+        }
+      }
+    }
+    public async Task<int> Execute(TextReader inputReader,
+      TextWriter outputWriter, TextWriter errorWriter) {
+      if (File.Exists(fileOrFolder)) {
+        try {
+          if (File.Exists(destination) && options.Contains('f')) {
+            File.Delete(destination);
+          }
+          File.Copy(fileOrFolder, destination);
+        } catch (Exception e) {
+          await outputWriter.WriteLineAsync(e.ToString());
+          return 1;
+        }
+      } else if (Directory.Exists(fileOrFolder)) {
+        try {
+          var actualDestination = Directory.Exists(destination)
+            ? Path.Combine(destination, Path.GetFileName(fileOrFolder))
+            : destination;
+          CopyDirectory(fileOrFolder, actualDestination, options.Contains('r'), options.Contains('f'));
+        } catch (Exception e) {
+          await outputWriter.WriteLineAsync(e.ToString());
+          return 1;
+        }
+      } else {
+        throw new ArgumentException("File or folder " + fileOrFolder + " not found");
+      }
+
+      return 0;
+    }
+
+    public override string ToString() {
+      return $"%cp {(options != "" ? options + " " : "")}{fileOrFolder} {destination}";
+    }
+  }
+}
diff --git a/Source/XUnitExtensions/Lit/MvCommand.cs b/Source/XUnitExtensions/Lit/MvCommand.cs
index 8a8808b1c13..8ab0a593516 100644
--- a/Source/XUnitExtensions/Lit/MvCommand.cs
+++ b/Source/XUnitExtensions/Lit/MvCommand.cs
@@ -44,7 +44,7 @@ public async Task<int> Execute(TextReader inputReader,
           return 1;
         }
       } else {
-        throw new ArgumentException("File " + fileOrFolder + " not found");
+        throw new ArgumentException("File or folder " + fileOrFolder + " not found");
       }
 
       return 0;