The following tests fail on systems with comma decimal mark settings:

• NUnit.Framework.Internal.EventListenerTextWriterTests.TestWriteDecimal
• NUnit.Framework.Internal.EventListenerTextWriterTests.TestWriteDouble
• NUnit.Framework.Internal.EventListenerTextWriterTests.TestWriteStringArg2
• NUnit.Framework.Internal.EventListenerTextWriterTests.TestWriteStringArg3
• NUnit.Framework.Constraints.LessThanConstraintTests.SimpleTolerance_Failure

The following test fails on systems with CultureInfo other than en:

• NUnit.Framework.Internal.EventListenerTextWriterTests.TestWriteStringArg1

Steps to reproduce:

1. Change system region, or language settings to one with comma decimal mark (Countries using Arabic numerals with decimal comma), and with language other than English
2. Run the build script with -Target Test option
3. See aforementioned tests fail