diff --git a/tests/testthat/test-cql-string.R b/tests/testthat/test-cql-string.R
index 7550a0ec..effeccc5 100644
--- a/tests/testthat/test-cql-string.R
+++ b/tests/testthat/test-cql-string.R
@@ -20,8 +20,10 @@ test_that("bcdc_cql_string fails when an invalid arguments are given",{
 })
 
 test_that("bcdc_cql_string fails when used on an uncollected (promise) object", {
-  expect_error(bcdc_cql_string(structure(list, class = "bcdc_promise")),
-               "you need to use collect")
+  expect_error(
+    bcdc_cql_string(structure(list(), class = "bcdc_promise")),
+    "you need to use collect"
+  )
 })
 
 test_that("CQL function works", {