diff --git a/NAMESPACE b/NAMESPACE
index 6835329..4b07034 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -1,6 +1,11 @@
 # Generated by roxygen2: do not edit by hand
 
+export(convert_params)
 export(estimate_mu_sd)
 export(estimate_parameters)
+export(get_prop_table)
+export(get_random_cp)
 export(get_responses)
+export(pad_levels)
+export(percentify)
 export(simulate_responses)
diff --git a/R/helper_functions.R b/R/helper_functions.R
index 46bb675..7efba97 100644
--- a/R/helper_functions.R
+++ b/R/helper_functions.R
@@ -18,6 +18,7 @@ var_skew_normal <- function(alpha) {
 
 #' Pad missing levels with zeros
 #'
+#' @export
 #' @param pk proportions or probabilities across possible responses
 #' @param K number of response categories
 #' @return table of proportions across all possible responses
@@ -30,6 +31,7 @@ pad_levels <- function(pk, K) {
 
 #' Get a table of proportions across each possible response
 #'
+#' @export
 #' @param data a vector or array of responses
 #' @param K number of response categories
 #' @return table of proportions
@@ -47,6 +49,7 @@ get_prop_table <- function(data, K) {
 
 #' Get random centered parameters `c(mu, sd, gamma1)` for testing
 #'
+#' @export
 #' @return random centered parameters
 get_random_cp <- function() {
   mu <- stats::rnorm(1, 0, 1)
@@ -58,6 +61,7 @@ get_random_cp <- function() {
 
 #' Return percentage for a given number
 #'
+#' @export
 #' @param x number
 #' @param digits number of digits
 percentify <- function(x, digits=0) {
diff --git a/R/simulation_of_responses.R b/R/simulation_of_responses.R
index 6ee44cd..ed46a70 100644
--- a/R/simulation_of_responses.R
+++ b/R/simulation_of_responses.R
@@ -286,6 +286,7 @@ delta_skew_normal <- function(alpha) {
 #' Converts from centered parameters to direct parameters appearing in
 #' the skew-normal density.
 #'
+#' @export
 #' @param cp centered parameters c(mu, sd, gamma1)
 #' @return direct parameters c(xi, omega, alpha)
 #' @seealso [sn::cp2dp]
diff --git a/tests/testthat/discretization_testthat.R b/tests/discretization_testthat.R
similarity index 97%
rename from tests/testthat/discretization_testthat.R
rename to tests/discretization_testthat.R
index 5927470..4066f58 100644
--- a/tests/testthat/discretization_testthat.R
+++ b/tests/discretization_testthat.R
@@ -1,5 +1,5 @@
-library(testthat)
-library(responsesR)
+library("testthat")
+library("responsesR")
 context("Testing optimal discretization")
 
 test_that("discretization of N(0,1) with 5 categories gives expected result", {
diff --git a/tests/testthat/estimation_of_parameters_testthat.R b/tests/estimation_of_parameters_testthat.R
similarity index 97%
rename from tests/testthat/estimation_of_parameters_testthat.R
rename to tests/estimation_of_parameters_testthat.R
index 5266e3c..a9cd0a4 100644
--- a/tests/testthat/estimation_of_parameters_testthat.R
+++ b/tests/estimation_of_parameters_testthat.R
@@ -1,4 +1,5 @@
-library(testthat)
+library("testthat")
+library("responsesR")
 context("Testing estimation of parameters")
 
 set.seed(12345)
diff --git a/tests/testthat/get_responses_testthat.R b/tests/get_responses_testthat.R
similarity index 97%
rename from tests/testthat/get_responses_testthat.R
rename to tests/get_responses_testthat.R
index 43118bb..317da8f 100644
--- a/tests/testthat/get_responses_testthat.R
+++ b/tests/get_responses_testthat.R
@@ -1,4 +1,5 @@
-library(testthat)
+library("testthat")
+library("responsesR")
 context("Testing get responses")
 
 set.seed(12345)
diff --git a/tests/testthat/sn_univariate_testthat.R b/tests/sn_univariate_testthat.R
similarity index 87%
rename from tests/testthat/sn_univariate_testthat.R
rename to tests/sn_univariate_testthat.R
index db2493b..fe85d35 100644
--- a/tests/testthat/sn_univariate_testthat.R
+++ b/tests/sn_univariate_testthat.R
@@ -1,7 +1,6 @@
-library(testthat)
+library("testthat")
+library("responsesR")
 context("Testing univariate skew-normal functions")
-source("helper_functions.R")
-source("simulation_of_responses.R")
 
 # parameter conversion test
 test_that("convert_params gives the same results as sn::cp2dp", {