if (!.Call(`_rxode2_isIntel`)) {
  test_that("single theta", {
    f <- function() {
      ini({
        tka <- 0.45
        label("Ka")
        tcl <- 1
        label("Cl")
        tv <- 3.45
        label("V")
        add.sd <- c(0, 0.7)
        twt <- 0
        eta.ka ~ 0.6
        eta.v ~ 0.1
      })
      model({
        ka <- exp(tka + eta.ka)
        cl <- exp(tcl + wt * twt)
        v <- exp(tv + eta.v)
        d/dt(depot) = -ka * depot
        d/dt(center) = ka * depot - cl/v * center
        cp = center/v
        cp ~ add(add.sd)
      })
    }

    f1 <- f()

    expect_equal(f1$singleTheta, c("tka", "tcl", "tv"))

    f <- function() {
      ini({
        tka <- 0.45
        label("Ka")
        tcl <- 1
        label("Cl")
        tv <- 3.45
        label("V")
        add.sd <- c(0, 0.7)
        twt <- 0
        eta.ka ~ 0.6
        eta.v ~ 0.1
      })
      model({
        ka <- exp(tka + eta.ka)
        cl <- exp(tcl + wt * twt/70)
        v <- exp(tv + eta.v)
        d/dt(depot) = -ka * depot
        d/dt(center) = ka * depot - cl/v * center
        cp = center/v
        cp ~ add(add.sd)
      })
    }

    f1 <- f()

    expect_equal(f1$singleTheta, c("tka", "tcl", "tv"))

  })
}