I want to run all tests in several dotnet core C# test projects.

From the root folder if I run dotnet test **/*.test.csproj it will only run the tests one folder down. From the root folder if I run dotnet test **/**/*.test.csproj it will only run the tests two folders down.

How can I get 'dotnet test' to recursively check all folders for a *.test.csproj project? i.e. run test from both projects above.