diff --git a/tests/testthat/test-report_s.R b/tests/testthat/test-report_s.R
index 115fb8a6..032ed42c 100644
--- a/tests/testthat/test-report_s.R
+++ b/tests/testthat/test-report_s.R
@@ -2,3 +2,8 @@ test_that("report_s", {
   expect_snapshot(report_s(s = 4.2), variant = "windows")
   expect_snapshot(report_s(p = 0.06), variant = "windows")
 })
+
+test_that("report_s, arguments", {
+  expect_error(report_s())
+  expect_error(report_s(s = 1:2), "single value")
+})