Standalone Bamboo 3.1 on Win 2003 R2 x86, JRE 1.6.0_24

The test assembly contains a single test:
[TestMethod]
public void TestMethod1()

{ Assert.Inconclusive( "No unit tests defined for the project!" ); }

Log output:

18-May-2011 16:36:50 Microsoft (R) Test Execution Command Line Tool Version 10.0.30319.1
18-May-2011 16:36:50 Copyright (c) Microsoft Corporation. All rights reserved.
18-May-2011 16:36:50
18-May-2011 16:36:50 Loading Tests.Unit\bin\Release\Tests.Unit.dll...
18-May-2011 16:36:51 Starting execution...
18-May-2011 16:36:51
18-May-2011 16:36:51 Results Top Level Tests
18-May-2011 16:36:51 ------- ---------------
18-May-2011 16:36:51 Inconclusive xxxxx.Tests.Unit.xxxxx.TestMethod1
18-May-2011 16:36:52 0/1 test(s) Passed, 1 Inconclusive
18-May-2011 16:36:52
18-May-2011 16:36:52 Summary
18-May-2011 16:36:52 -------
18-May-2011 16:36:52 Test Run Inconclusive.
18-May-2011 16:36:52 Inconclusive 1
18-May-2011 16:36:52 ---------------
18-May-2011 16:36:52 Total 1
18-May-2011 16:36:52 Results file: D:\bamboo-home\xml-data\build-dir\xxxxx\testresults.trx
18-May-2011 16:36:52 Test Settings: Default Test Settings
18-May-2011 16:36:52 Parsing test results...
18-May-2011 16:36:52 Failing task since test cases were expected but none were found.
18-May-2011 16:36:52 Finished task 'Tests.Unit'