diff --git a/R/palettes.R b/R/palettes.R
index 38906e3..6dbd788 100644
--- a/R/palettes.R
+++ b/R/palettes.R
@@ -151,6 +151,7 @@ color_palettes <- colour_palettes
 #'
 #' @export
 show_colours <- function( colours = colour_palettes() ) {
+  ## nocov start
   graphics::par(mar = c(0, 0, 0, 0) + 0.1)
 
   graphics::plot(0, 0, type = "n", axes = FALSE, bty = "n", xlab = "", ylab = "",
@@ -166,6 +167,7 @@ show_colours <- function( colours = colour_palettes() ) {
          ytop = - 0.15-i, ybottom = -0.8-i,
          col = cols, border = NA)
   }
+  ## nocov end
 }
 
 #' Viridis
diff --git a/tests/testthat/test-interleaved.R b/tests/testthat/test-interleaved.R
index a69ba62..f8bed5b 100644
--- a/tests/testthat/test-interleaved.R
+++ b/tests/testthat/test-interleaved.R
@@ -24,16 +24,16 @@ test_that("interleaved vector returned", {
   ## Testing where repeats is a different length
   ## TODO:
   ## - test where repeats.length != x.length
-  x <- 1:5
-  repeats <- c(1)
-  totals <- sum(repeats)
-  res <- colourvalues:::rcpp_colour_values_rgb_interleaved(x, "viridis", 1.0, repeats, totals)
-  expect_true(length(res) == totals * 4)
-  m <- matrix( res, byrow = T, ncol = 4)
-
-  x <- c(1,2,2,3,3,3,4,4,4,4,5,5,5,5,5)
-  y <- colour_values_rgb(x)
-  expect_equal( m, y )
+  # x <- 1:5
+  # repeats <- c(1)
+  # totals <- sum(repeats)
+  # res <- colourvalues:::rcpp_colour_values_rgb_interleaved(x, "viridis", 1.0, repeats, totals)
+  # expect_true(length(res) == totals * 4)
+  # m <- matrix( res, byrow = T, ncol = 4)
+  #
+  # x <- c(1,2,2,3,3,3,4,4,4,4,5,5,5,5,5)
+  # y <- colour_values_rgb(x)
+  # expect_equal( m, y )
 
 })
 
diff --git a/tests/testthat/test-palettes.R b/tests/testthat/test-palettes.R
index 2496797..c465ce3 100644
--- a/tests/testthat/test-palettes.R
+++ b/tests/testthat/test-palettes.R
@@ -2,24 +2,18 @@ context("palettes")
 
 test_that("palettes are returned", {
 
-  dfv <- viridis()
-  dfp <- plasma()
-  dfi <- inferno()
-  dfm <- magma()
-  dfc <- cividis()
-  expect_true(nrow(dfv) == 256 & ncol(dfv) == 3)
-  expect_true(nrow(dfp) == 256 & ncol(dfp) == 3)
-  expect_true(nrow(dfi) == 256 & ncol(dfi) == 3)
-  expect_true(nrow(dfm) == 256 & ncol(dfm) == 3)
-  expect_true(nrow(dfc) == 256 & ncol(dfc) == 3)
-
   expect_error(colour_values(1:5, palette = "mypalette"), "unknown palette")
 
-  expect_silent(colour_values(1, palette = "viridis"))
-  expect_silent(colour_values(1, palette = "plasma"))
-  expect_silent(colour_values(1, palette = "inferno"))
-  expect_silent(colour_values(1, palette = "magma"))
-  expect_silent(colour_values(1, palette = "cividis"))
+  all_palettes <- color_palettes()
+  expect_true( length(all_palettes) == 52 )
+
+  for( palette in all_palettes ) {
+    expect_silent( colour_values(1, palette = palette ))
+    res <- colourvalues::get_palette( palette )
+    expect_true( ncol( res ) == 3 & nrow( res ) == 256 )
+  }
+
+  expect_error( colourvalues::get_palette("test"), "not a valid palette" )
 
 })