diff --git a/README.md b/README.md
index aaba5a1..be4ef2d 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 <!-- badges: start -->
-[![R-CMD-check](https://github.com/imbi-heidelberg/DescrTab2/workflows/R-CMD-check/badge.svg)](https://github.com/imbi-heidelberg/DescrTab2/actions)
+[![R-CMD-check](https://github.com/imbi-heidelberg/DescrTab2/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/imbi-heidelberg/DescrTab2/actions/workflows/R-CMD-check.yaml)
 [![codecov](https://codecov.io/gh/imbi-heidelberg/DescrTab2/branch/master/graph/badge.svg)](https://app.codecov.io/gh/imbi-heidelberg/DescrTab2)
 [![Github version](https://img.shields.io/github/r-package/v/imbi-heidelberg/DescrTab2/master?label=Github%20version%20%40master)](https://github.com/imbi-heidelberg/DescrTab2/tree/master)
 [![CRAN Version](https://www.r-pkg.org/badges/version/DescrTab2)](https://www.r-pkg.org/badges/version/DescrTab2)
diff --git a/tests/testthat/test_html.R b/tests/testthat/test_html.R
index 33bc61e..55500f6 100644
--- a/tests/testthat/test_html.R
+++ b/tests/testthat/test_html.R
@@ -1,4 +1,7 @@
-# write_in_tmpfile_for_cran() <- FALSE
+library(dplyr, quietly=TRUE, warn.conflicts=FALSE)
+dat <- iris[, c("Species", "Sepal.Length")]
+dat <- dat |>  mutate(animal = c("Mammal", "Fish") |> rep(75) %>% factor())
+dat <- dat |>  mutate(food = c("fries", "wedges") |> sample(150, TRUE) |> factor())
 
 test_that(
   "knit an html file with DescrTab2 tables", {
@@ -21,4 +24,12 @@ test_that("Outputformat html produces no errors",{
     group_labels = list(setosa = "My custom group label"),
     var_options = list(Sepal.Length = list(label = "My custom variable label"))
   ) %>% print(print_format="html", silent=FALSE)), NA)
+
+  expect_error(capture_output(descr(
+    dat,
+    "animal",
+    group_labels = list(setosa = "My custom group label"),
+    format_options = list(print_CI=TRUE),
+    var_options = list(Sepal.Length = list(label = "My custom variable label"))
+  ) |> print(print_format="html", silent=FALSE)), NA)
 })
diff --git a/tests/testthat/test_tex.R b/tests/testthat/test_tex.R
index 11515cc..050c73e 100644
--- a/tests/testthat/test_tex.R
+++ b/tests/testthat/test_tex.R
@@ -1,3 +1,8 @@
+library(dplyr, quietly=TRUE, warn.conflicts=FALSE)
+dat <- iris[, c("Species", "Sepal.Length")]
+dat <- dat |>  mutate(animal = c("Mammal", "Fish") |> rep(75) %>% factor())
+dat <- dat |>  mutate(food = c("fries", "wedges") |> sample(150, TRUE) |> factor())
+
 test_that("knit a tex file with DescrTab2 tables", {
   skip_on_cran()
   # skip_on_ci()
@@ -18,5 +23,12 @@ test_that("Outputformat .tex produces no errors",{
     "Species",
     group_labels = list(setosa = "My custom group label"),
     var_options = list(Sepal.Length = list(label = "My custom variable label"))
-  ) %>% print(print_format="tex", silent=FALSE)), NA)
+  ) |> print(print_format="tex", silent=FALSE)), NA)
+  expect_error(capture_output(descr(
+    dat,
+    "animal",
+    group_labels = list(setosa = "My custom group label"),
+    format_options = list(print_CI=TRUE),
+    var_options = list(Sepal.Length = list(label = "My custom variable label"))
+  ) |>  print(print_format="tex", silent=FALSE)), NA)
 })