diff --git a/R/msigdbr-collections.R b/R/msigdbr-collections.R
index 8074701..b42b0fc 100644
--- a/R/msigdbr-collections.R
+++ b/R/msigdbr-collections.R
@@ -8,9 +8,11 @@
 #' @export
 #'
 #' @examples
+#' \donttest{
 #' msigdbr_collections()
+#' }
 msigdbr_collections <- function(db_species = "Hs") {
-  # rlang::check_installed("msigdbdf")
+  # Check that msigdbdf is installed
   msigdbr_check_data()
 
   # Get the full table of gene sets and their member genes
diff --git a/R/msigdbr.R b/R/msigdbr.R
index 6a18b58..0cdc4b6 100644
--- a/R/msigdbr.R
+++ b/R/msigdbr.R
@@ -40,10 +40,6 @@
 #' }
 msigdbr <- function(species = "Homo sapiens", db_species = "HS", collection = NULL, subcollection = NULL, category = deprecated(), subcategory = deprecated()) {
   # Check that msigdbdf is installed
-  # a dependency listed in DESCRIPTION Suggests is not guaranteed to be installed
-  # if (!requireNamespace("msigdbdf", quietly = TRUE)) {
-  #   stop("package 'msigdbdf' must be installed to use this function", call. = FALSE)
-  # }
   msigdbr_check_data()
 
   # Check parameters
diff --git a/man/msigdbr_collections.Rd b/man/msigdbr_collections.Rd
index a1f2959..2c197f6 100644
--- a/man/msigdbr_collections.Rd
+++ b/man/msigdbr_collections.Rd
@@ -16,5 +16,7 @@ A data frame of the available collections.
 List the collections available in the msigdbr package
 }
 \examples{
+\donttest{
 msigdbr_collections()
 }
+}