vstest.executionengine.x86.exe not closing

Question

I\'ve encountered an error when running unit tests. If I Debug the unit tests vstest.executionengine.x86.exe runs, then closes when the tests pass.

If I just run the

Answer 1

I had this issue when running test using Resharper's test runner which doesn't seem to respect the Test-->Test Settings-->Keep Test Execution Engine Running setting. In my case it was causing the build to fail with the following error:

warning MSB3026: Could not copy "...\SQLite.Interop.dll" to "bin\Debug\x86\SQLite.Interop.dll". Beginning retry 10 in 1000ms. The process cannot access the file 'bin\Debug\x86\SQLite.Interop.dll' because it is being used by another process.

Adding a pre-build event to the test project as @HappyCat suggested worked for me. I also needed to wrap it in an if statement to prevent it from running on the build server and interfering with other jobs.

if $(ConfigurationName) == Debug (
    echo "attempting to kill vstest to prevent access denied on sqlite.interop.dll"
    taskkill /F /IM vstest.executionengine.x86.exe /FI "MEMUSAGE gt 1"
)