GithubActions - PlatformError: X11: The DISPLAY environment variable is missing

Question

I'm trying to create Github Actions for my repo on Github. Everything works fine, until actions come to testing because I have this error:

Run cd tests && go test . -v
go: downloading github.com/davecgh/go-spew v1.1.1
go: downloading github.com/pmezard/go-difflib v1.0.0
go: downloading gopkg.in/yaml.v3 v3.0.1
2024/03/14 23:49:05 PlatformError: X11: The DISPLAY environment variable is missing
panic: NotInitialized: The GLFW library is not initialized

goroutine 1 [running]:
github.com/hajimehoshi/ebiten/v2/internal/cglfw.acceptError({0x0, 0x0, 0x10004?})
    /home/runner/go/pkg/mod/github.com/hajimehoshi/ebiten/[email protected]/internal/cglfw/error.go:184 +0x1f4
github.com/hajimehoshi/ebiten/v2/internal/cglfw.panicError(...)
    /home/runner/go/pkg/mod/github.com/hajimehoshi/ebiten/[email protected]/internal/cglfw/error.go:195
github.com/hajimehoshi/ebiten/v2/internal/cglfw.WindowHint(0x0?, 0x0?)
    /home/runner/go/pkg/mod/github.com/hajimehoshi/ebiten/[email protected]/internal/cglfw/window.go:317 +0x34
github.com/hajimehoshi/ebiten/v2/internal/glfw.WindowHint(...)
    /home/runner/go/pkg/mod/github.com/hajimehoshi/ebiten/[email protected]/internal/glfw/glfw_cglfw.go:347
github.com/hajimehoshi/ebiten/v2/internal/ui.initialize()
    /home/runner/go/pkg/mod/github.com/hajimehoshi/ebiten/[email protected]/internal/ui/ui_glfw.go:174 +0x36
github.com/hajimehoshi/ebiten/v2/internal/ui.init.2()
    /home/runner/go/pkg/mod/github.com/hajimehoshi/ebiten/[email protected]/internal/ui/ui_glfw.go:159 +0x13
FAIL    github.com/Arkadiusz4/meteor-maverick-game/tests    0.028s
FAIL
Error: Process completed with exit code 1.

As you can see there is problem with X11 (I have no clue what's going on here).

I tried to add something to my workflow file:

name: Go

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

jobs:

  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        go-version: [ '1.21.x' ]

    steps:
      - uses: actions/checkout@v3

      - name: Set up Go
        uses: actions/setup-go@v4
        with:
          go-version: '1.21.3'

      - name: Display Go version
        run: go version

      - name: Install dependencies
        run: |
          go get github.com/hajimehoshi/ebiten/v2
          go get github.com/stretchr/testify
          sudo apt-get install libxrandr-dev libgl1-mesa-dev libxcursor-dev libxinerama-dev libxi-dev libxxf86vm-dev xorg-dev mesa-utils

      - name: Build
        run: go build -v ./...

      - name: Testing, testing
        run: cd tests && go test . -v

It doesn't help, so I also tried to add something to my main.go.

func main() {
    err := os.Setenv("DISPLAY", ":0")
    if err != nil {
        panic(err)
    }

    g := game.NewGame()

    err = ebiten.RunGame(g)
    err := ebiten.RunGame(g)
    if err != nil {
        panic(err)
        }
}

It also doesn't help and I don't have any other thoughts how I can repair this :/

Thanks for your help in advance.