rxTest({
  if (!.Call(`_rxode2_isIntel`)) {
    test_that("mu2 referencing", {

      f <- function() {
        ini({
          tka <- 0.45644793862596
          label("Log Ka")
          tcl <- 1.0158342238421
          label("Log Cl")
          tv <- 3.45168722356501
          label("Log V")
          add.sd <- c(0, 0.693865857699365)
          wt_cl <- fix(0.75)
          eta.ka ~ 0.413242125585966
          eta.cl ~ 0.0700506402691836
          eta.v ~ 0.0190586604340742
        })
        model({
          ka <- exp(tka + eta.ka)
          cl <- exp(tcl + eta.cl + wt_cl * log(WT/70.5))
          v <- exp(tv + eta.v)
          linCmt() ~ add(add.sd)
        })
      }

      f <- f()

      model.BASE <- function() {
        ini({
          tka <- log(1) # Log Ka
          tcl <- log(2) # Log Cl
          tv <- log(20)    # Log V
          eta.ka ~ 0.5
          eta.cl ~ 0.1
          eta.v ~ 0.1
          add.sd <- 0.5
        })
        model({
          ka <- exp(tka + eta.ka)
          cl <- exp(tcl + eta.cl)
          v <- exp(tv + eta.v)
          linCmt() ~ add(add.sd)
        })
      }


      m2 <- model.BASE %>%
        model(cl <- exp(tcl + eta.cl + wt_cl*log(WT/70.5))) %>%
        ini(wt_cl <- fix(0.75))

      expect_equal(f$mu2RefCovariateReplaceDataFrame,
                   m2$mu2RefCovariateReplaceDataFrame)

    })
  }
})