Getting Each 'every' block requires single mock call! dev.mokkery.internal.NotSingleCallInEveryBlockException:

I am using Mockery lib for mocking in my Kotlin Multiplatform project. Even though I am using a mock instance; I am getting the error:

Each 'every' block requires single mock call! dev.mokkery.internal.NotSingleCallInEveryBlockException:

Code

class MyTest {

    private lateinit var clock: Clock


    @BeforeTest
    fun setup() {
        clock = mock()
    }

  @Test
    fun `test`() = runTest {
        val initialTime = Clock.System.now()
        every { clock.now() } returns initialTime
        assertEquals(clock.now(), initialTime)
    }
}