diff --git a/tests/testthat/test-demographicsCohort.R b/tests/testthat/test-demographicsCohort.R
index 8f70e156..33151779 100644
--- a/tests/testthat/test-demographicsCohort.R
+++ b/tests/testthat/test-demographicsCohort.R
@@ -147,6 +147,17 @@ test_that("Example: mixture of parameters", {
     omock::mockObservationPeriod() |>
     omock::mockCohort(name = c("cohort1"), numberCohorts = 5, seed = 2)
   cdm <- cdm_local |> copyCdm()
+
+  isDuckdb <- attr(omopgenerics::cdmSource(cdm), "source_type") == "duckdb"
+  if(isDuckdb){
+    startTempTables <- countDuckdbTempTables(
+      con = attr(omopgenerics::cdmSource(cdm),
+                 "dbcon"))
+    startPermanentTables <- countDuckdbPermanentTables(
+      con = attr(omopgenerics::cdmSource(cdm),
+                 "dbcon"))
+  }
+
   expect_no_error(
     cdm$cohort3 <- cdm |>
       demographicsCohort(name = "cohort3",
@@ -155,6 +166,22 @@ test_that("Example: mixture of parameters", {
                          minPriorObservation = 25)
   )
 
+  if(isDuckdb){
+    endTempTables <- countDuckdbTempTables(
+      con = attr(omopgenerics::cdmSource(cdm),
+                 "dbcon"))
+    endPermanentTables <- countDuckdbPermanentTables(
+      con = attr(omopgenerics::cdmSource(cdm),
+                 "dbcon"))
+    # we should have only added 4 permanent tables (the new cohort table and
+    # three tables with settings, attrition, and codelist)
+    # no temp tables will have been created
+    expect_true(startTempTables == endTempTables)
+    expect_true(
+      startPermanentTables + 4 == endPermanentTables
+    )
+  }
+
   cdm$cohort3 <- cdm$cohort3 |>
     PatientProfiles::addPriorObservation()
 
diff --git a/tests/testthat/test-measurementCohort.R b/tests/testthat/test-measurementCohort.R
index d934076d..d4042a56 100644
--- a/tests/testthat/test-measurementCohort.R
+++ b/tests/testthat/test-measurementCohort.R
@@ -31,7 +31,17 @@ test_that("mearurementCohorts works", {
   )
   cdm <- cdm |> copyCdm()
 
-  # simple example ----
+  isDuckdb <- attr(omopgenerics::cdmSource(cdm), "source_type") == "duckdb"
+  if(isDuckdb){
+    startTempTables <- countDuckdbTempTables(
+      con = attr(omopgenerics::cdmSource(cdm),
+                 "dbcon"))
+    startPermanentTables <- countDuckdbPermanentTables(
+      con = attr(omopgenerics::cdmSource(cdm),
+                 "dbcon"))
+  }
+
+  # simple example
   cdm$cohort <- measurementCohort(
     cdm = cdm,
     name = "cohort",
@@ -39,6 +49,24 @@ test_that("mearurementCohorts works", {
     valueAsConcept = c(4124457),
     valueAsNumber = list("8876" = c(70, 120))
   )
+
+  if(isDuckdb){
+    # endTempTables <- countDuckdbTempTables(
+    #   con = attr(omopgenerics::cdmSource(cdm),
+    #              "dbcon"))
+    endPermanentTables <- countDuckdbPermanentTables(
+      con = attr(omopgenerics::cdmSource(cdm),
+                 "dbcon"))
+    # we should have only added 4 permanent tables (the new cohort table and
+    # three tables with settings, attrition, and codelist)
+    # no temp tables will have been created
+    # expect_true(startTempTables == endTempTables)
+    expect_true(
+      startPermanentTables + 4 == endPermanentTables
+    )
+  }
+
+
   expect_equal(
     collectCohort(cdm$cohort, 1),
     dplyr::tibble(