vstest.console.exe runs same tests multiple times

This is the command I use to run all NUnit tests from specified library

vstest.console.exe "PATH_TO_REPOSITORY\Tests\terminalBaseTests\bin\debug\terminalBaseTests.dll" /logger:trx /TestAdapterPath:"PATH_TO_REPOSITORY"

This dll contains 27 tests but I see that they launched for some reason 3 times and the resulting message says that 81 tests were passed