How to run all tests in a Go project (go test) and not miss any?

Hello, colleagues! I've just started learning Go and am trying to figure out testing. I have a small project with this structure: ``` myproject/ ├── main.go ├── go.mod ├── pkg/ │ ├── calc/ │ │ ├── calc.go │ │ └── calc_test.go │ └── utils/ │ ├── strings.go │ └── strings_test.go └── tests/ └── integration_test.go ``` When I'm in the project root and run `go test`, it only runs tests from the current folder (where main.go is), and tests in subfolders `pkg/` and `tests/` are ignored. I tried running `go test ./...`, but then it complains that it cannot find some files, especially in `tests/`. What am I doing wrong? How do I correctly run all project tests with a single command? Do I need to configure `go.mod` or the structure in some special way?