diff --git a/src/AddIns/BackendBindings/Python/PythonBinding/Test/Gui/RunPythonCommandTests.cs b/src/AddIns/BackendBindings/Python/PythonBinding/Test/Gui/RunPythonCommandTests.cs
index d1ebf7dea2..d4366aee0e 100644
--- a/src/AddIns/BackendBindings/Python/PythonBinding/Test/Gui/RunPythonCommandTests.cs
+++ b/src/AddIns/BackendBindings/Python/PythonBinding/Test/Gui/RunPythonCommandTests.cs
@@ -61,7 +61,7 @@ namespace PythonBinding.Tests.Gui
 		public void Run_PythonFileOpen_IronPythonConsoleAndPythonFileNameAndPausePassedAsCommandLineArguments()
 		{
 			string args = debugger.ProcessStartInfo.Arguments;
-			string expectedArgs = "/c \"C:\\IronPython\\ipy.exe \"test.py\"\" & pause";
+			string expectedArgs = "/c \"\"C:\\IronPython\\ipy.exe\" \"test.py\"\" & pause";
 			Assert.AreEqual(expectedArgs, args);
 		}
 		
diff --git a/src/AddIns/BackendBindings/Ruby/RubyBinding/Test/Gui/RunRubyCommandTests.cs b/src/AddIns/BackendBindings/Ruby/RubyBinding/Test/Gui/RunRubyCommandTests.cs
index 1ba2d2d20e..39224b6d95 100644
--- a/src/AddIns/BackendBindings/Ruby/RubyBinding/Test/Gui/RunRubyCommandTests.cs
+++ b/src/AddIns/BackendBindings/Ruby/RubyBinding/Test/Gui/RunRubyCommandTests.cs
@@ -62,7 +62,7 @@ namespace RubyBinding.Tests.Gui
 		public void Run_RubyFileOpen_ProcessInfoArgsContainsFileNameActiveInTextEditor()
 		{
 			string arguments = debugger.ProcessStartInfo.Arguments;
-			string expectedArguments = "/c \"C:\\IronRuby\\ir.exe \"test.rb\"\" & pause";
+			string expectedArguments = "/c \"\"C:\\IronRuby\\ir.exe\" \"test.rb\"\" & pause";
 			
 			Assert.AreEqual(expectedArguments, arguments);
 		}
diff --git a/src/AddIns/BackendBindings/Scripting/Project/Src/PauseCommandPromptProcessStartInfo.cs b/src/AddIns/BackendBindings/Scripting/Project/Src/PauseCommandPromptProcessStartInfo.cs
index 15f98267df..3dc0ad4824 100644
--- a/src/AddIns/BackendBindings/Scripting/Project/Src/PauseCommandPromptProcessStartInfo.cs
+++ b/src/AddIns/BackendBindings/Scripting/Project/Src/PauseCommandPromptProcessStartInfo.cs
@@ -28,7 +28,7 @@ namespace ICSharpCode.Scripting
 		
 		string GetArguments()
 		{
-			return String.Format("/c \"{0} {1}\" & pause", 
+			return String.Format("/c \"\"{0}\" {1}\" & pause", 
 				processStartInfo.FileName, processStartInfo.Arguments);
 		}
 	}