This is the simplified test using MockWebServer

LaunchesScreenKtTest.kt

@ExperimentalMaterialApi
@RunWith(AndroidJUnit4::class)
@HiltAndroidTest
class LaunchesScreenKtTest : BaseScreenTest() {

    @Test
    @InternalCoroutinesApi
    fun visibleItemsCountAfterOpeningTheScreen() {
        mockWebServer.dispatcher = SuccessDispatcher()
        setMainContent()

        composeTestRule.apply{ 
            onNodeWithText("Launches").assertIsDisplayed().performClick()
            mainClock.advanceTimeBy(2000)
            onAllNodesWithContentDescription(
                              "Item",
                              substring = true,
                              useUnmergedTree = true
                            ).assertCountEquals(6)
        }
    }
}