Using TeamCity 6.5.1
NUnit version 2.5.10
Win2008 x64
Project is using .NET 4.0
Trying to execute the built-in TeamCity NUnit test runner, I receive the following error:
NUnit error running tests in 'E:\TeamCity\LocalBuildAgent\BuildAgent\work\698a8f459eac8cd9\MyProject\bin\Release\MyProject.Tests.dll' assebmly
System.BadImageFormatException: Could not load file or assembly 'E:\TeamCity\LocalBuildAgent\BuildAgent\work\698a8f459eac8cd9\MyProject\MyProject.Tests\bin\Release\MyProject.Tests.dll' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.