diff --git a/R/test_diseasystore.R b/R/test_diseasystore.R
index b9b1c3c6..208c0397 100644
--- a/R/test_diseasystore.R
+++ b/R/test_diseasystore.R
@@ -327,7 +327,7 @@ test_diseasystore <- function(
 
         testthat::expect_identical(
           SCDB::nrow(reference_out_of_bounds),
-          0,
+          0L,
           info = glue::glue("Feature `{.x}` returns data outside the study period.")
         )
 
@@ -353,14 +353,14 @@ test_diseasystore <- function(
         # Remember that data is valid in the interval [valid_from, valid_until) and NA is treated as infinite
         testthat::expect_identical(
           SCDB::nrow(dplyr::filter(reference, is.na(.data$valid_from))),
-          0
+          0L
         )
 
         testthat::expect_identical(
           reference |>
             dplyr::filter(.data$valid_from >= .data$valid_until) |>
             SCDB::nrow(),
-          0,
+          0L,
           info = glue::glue("Feature `{.x}` has some elements where `valid_from` >= `valid_until`.")
         )
 
diff --git a/tests/testthat/test-age_helpers.R b/tests/testthat/test-age_helpers.R
index b473fe4b..7df7b592 100644
--- a/tests/testthat/test-age_helpers.R
+++ b/tests/testthat/test-age_helpers.R
@@ -69,7 +69,7 @@ test_that("age_on_date() works for date input", {
 
     }
 
-    expect_identical(
+    expect_equal(                                                                                                       # nolint: expect_identical_linter. The return data types from the different database backends may not always be identical
       dplyr::pull(test_ages,      "age"),
       dplyr::pull(reference_ages, "age")
     )
@@ -118,7 +118,7 @@ test_that("age_on_date() works for reference input", {
 
     }
 
-    expect_identical(
+    expect_equal(                                                                                                       # nolint: expect_identical_linter. The return data types from the different database backends may not always be identical
       dplyr::pull(test_ages,      "age"),
       dplyr::pull(reference_ages, "age")
     )
diff --git a/tests/testthat/test-truncate_interlace.R b/tests/testthat/test-truncate_interlace.R
index 3cfb143b..011c6fbc 100644
--- a/tests/testthat/test-truncate_interlace.R
+++ b/tests/testthat/test-truncate_interlace.R
@@ -97,8 +97,8 @@ test_that("truncate_interlace works", {
       max_date_secondary <- purrr::reduce(purrr::map(secondary, ~ max(.x$valid_until)), max)
       max_date <- min(max_date_secondary, max(primary$valid_until))
 
-      expect_identical(min(output$valid_from),  min_date)
-      expect_identical(max(output$valid_until), max_date)
+      expect_equal(min(output$valid_from),  min_date)                                                                   # nolint: expect_identical_linter. The return data types from the different database backends may not always be identical
+      expect_equal(max(output$valid_until), max_date)                                                                   # nolint: expect_identical_linter. The return data types from the different database backends may not always be identical
 
     }