diff --git a/R/requireCohortIntersect.R b/R/requireCohortIntersect.R
index ff5c68c..510f20c 100644
--- a/R/requireCohortIntersect.R
+++ b/R/requireCohortIntersect.R
@@ -105,7 +105,7 @@ requireCohortIntersect <- function(cohort,
     ) |
       (!.data$cohort_definition_id %in% .env$cohortId)
     ) |>
-    dplyr::select(cols) |>
+    dplyr::select(dplyr::all_of(cols)) |>
     dplyr::compute(name = subsetName, temporary = FALSE)
 
   # attrition reason
diff --git a/tests/testthat/test-requireConceptIntersect.R b/tests/testthat/test-requireConceptIntersect.R
index f9298ea..0266069 100644
--- a/tests/testthat/test-requireConceptIntersect.R
+++ b/tests/testthat/test-requireConceptIntersect.R
@@ -96,7 +96,7 @@ test_that("require flag in concept", {
   # only support one concept at the moment
  expect_error(
    requireConceptIntersect(cohort = cdm$cohort1,
-                               conceptSet = list(a = 1, b = 2),
+                               conceptSet = list(a = 1L, b = 2L),
                                window = c(-Inf, Inf))
  )
  expect_error(
diff --git a/tests/testthat/test-requireDemographics.R b/tests/testthat/test-requireDemographics.R
index eebd483..d884237 100644
--- a/tests/testthat/test-requireDemographics.R
+++ b/tests/testthat/test-requireDemographics.R
@@ -436,7 +436,7 @@ test_that("codelist kept with >1 requirement", {
 
   cdm <- cdm_local |> copyCdm()
 
-  cdm$cohort1 <- conceptCohort(cdm = cdm, conceptSet = list(a = 1, b = 2), name = "cohort1")
+  cdm$cohort1 <- conceptCohort(cdm = cdm, conceptSet = list(a = 1L, b = 2L), name = "cohort1")
 
   cdm$cohort2 <- cdm$cohort1 |> requireDemographics(name = "cohort2", minPriorObservation = c(0,3), cohortId = 1)
   expect_equal(attr(cdm$cohort2, "cohort_codelist") |> dplyr::collect() |> dplyr::arrange(.data$cohort_definition_id), dplyr::tibble(