diff --git a/R/dummy_functions.R b/R/dummy_functions.R
index b04c4a488b..ed0a582c02 100644
--- a/R/dummy_functions.R
+++ b/R/dummy_functions.R
@@ -9,8 +9,8 @@
 #' to read more about decorators.
 #'
 #' @inheritParams teal_modules
-#' @param decorators `r lifecycle::badge("experimental")` (`list` of `teal_transform_module` or `NULL`) optional,
-#' if not `NULL`, decorator for tables or plots included in the module.
+#' @param decorators `r lifecycle::badge("experimental")` (`list` of `teal_transform_module`) optional,
+#' decorator for `object` included in the module.
 #'
 #' @return A `teal` module which can be included in the `modules` argument to [init()].
 #' @examples
@@ -25,9 +25,9 @@
 example_module <- function(label = "example teal module",
                            datanames = "all",
                            transformators = list(),
-                           decorators = NULL) {
+                           decorators = list()) {
   checkmate::assert_string(label)
-  checkmate::assert_list(decorators, "teal_transform_module", null.ok = TRUE)
+  checkmate::assert_list(decorators, "teal_transform_module")
 
   ans <- module(
     label,
diff --git a/man/example_module.Rd b/man/example_module.Rd
index 239ca105d5..cae924c932 100644
--- a/man/example_module.Rd
+++ b/man/example_module.Rd
@@ -8,7 +8,7 @@ example_module(
   label = "example teal module",
   datanames = "all",
   transformators = list(),
-  decorators = NULL
+  decorators = list()
 )
 }
 \arguments{
@@ -27,8 +27,8 @@ argument.
 \item{transformators}{(\code{list} of \code{teal_transform_module}) that will be applied to transform module's data input.
 To learn more check \code{vignette("data-transform-as-shiny-module", package = "teal")}.}
 
-\item{decorators}{\ifelse{html}{\href{https://lifecycle.r-lib.org/articles/stages.html#experimental}{\figure{lifecycle-experimental.svg}{options: alt='[Experimental]'}}}{\strong{[Experimental]}} (\code{list} of \code{teal_transform_module} or \code{NULL}) optional,
-if not \code{NULL}, decorator for tables or plots included in the module.}
+\item{decorators}{\ifelse{html}{\href{https://lifecycle.r-lib.org/articles/stages.html#experimental}{\figure{lifecycle-experimental.svg}{options: alt='[Experimental]'}}}{\strong{[Experimental]}} (\code{list} of \code{teal_transform_module}) optional,
+decorator for \code{object} included in the module.}
 }
 \value{
 A \code{teal} module which can be included in the \code{modules} argument to \code{\link[=init]{init()}}.