diff --git a/tests/testthat/setup.R b/tests/testthat/setup.R
new file mode 100644
index 0000000..9ee7b5c
--- /dev/null
+++ b/tests/testthat/setup.R
@@ -0,0 +1,11 @@
+# CRAN incoming checks can fail if examples use more than 2 cores.
+# We can run in this problem by using data.table https://github.com/Rdatatable/data.table/issues/5658
+# R CMD Check throws the NOTE because CRAN sets
+# _R_CHECK_EXAMPLE_TIMING_CPU_TO_ELAPSED_THRESHOLD_ to "2.5"
+# which means "more than two cores are running".
+# We check for this specific environment variable and run the nflreadr helper
+# if it is set to any value
+cpu_threshold <- as.numeric(Sys.getenv("_R_CHECK_EXAMPLE_TIMING_CPU_TO_ELAPSED_THRESHOLD_",
+                                       NA_character_))
+
+if (!is.na(cpu_threshold)) nflreadr::.for_cran()