How to exclude Projects with names ending in ".Test" from my code coverage analysis in VS2012 Unit Tests

How to exclude Projects with names ending in ".Test" from my code coverage
analysis in VS2012 Unit Tests

My solution is set up with projects called "ProjectName" with
"ProjectName".Tests containing my unit tests. I'd like to exclude the test
projects from the code coverage analysis under VS 2012 (MS Test) and have
successfully managed to do this by adding the ExcludeFromCodeCoverage
attribute to each test class as described here.
As the number of tests classes is growing it would be nice to exclude the
entire Test assemblies. I want to use the .runsettings file also described
in that MSDN link but don't seem to be having any luck.
Here is my .runsettings file:
<?xml version="1.0" encoding="utf-8"?>
<RunSettings>
<DataCollectionRunSettings>
<DataCollectors>
<DataCollector friendlyName="Code Coverage"
uri="datacollector://Microsoft/CodeCoverage/2.0"
assemblyQualifiedName="Microsoft.VisualStudio.Coverage.DynamicCoverageDataCollector,
Microsoft.VisualStudio.TraceCollector, Version=11.0.0.0,
Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
<Configuration>
<CodeCoverage>
<ModulePaths>
<Exclude>
<ModulePath>.*tests.*</ModulePath>
<ModulePath>.*Tests.*</ModulePath>>
</Exclude>
</ModulePaths>
</CodeCoverage>
</Configuration>
</DataCollector>
</DataCollectors>
</DataCollectionRunSettings>
</RunSettings>
This results in Empty results generated for Code Coverage, if I comment
out the whole <Exclude> block I get code coverage across all of the
solution's projects including the Tests (as expected, I just wanted to
ensure that the addition of the runSettings file wasn't causing issues
itself).
I have tried adding in:
<Include>
<ModulePath>.*\.dll$</ModulePath>
<ModulePath>.*\.exe$</ModulePath>
</Include>
But again, I get Empty Results. I was under the impression that an empty
(or non-existent) Include block will include everything by default unless
matched by the Exclude block, so I don't think this is strictly required.
Can anyone point me in the right direction? I see from this other question
that I'm not alone in trying to exclude tests, but I would like to do it
at assembly level and MSDN seems to suggest I can.