diff --git a/tests/testthat.R b/tests/testthat.R
index 63961a8..4facdde 100644
--- a/tests/testthat.R
+++ b/tests/testthat.R
@@ -1,12 +1,13 @@
-
 library(callr)
 
-if (callr:::is_false_check_env_var("_R_CHECK_FORCE_SUGGESTS_")) {
-  if (requireNamespace("testthat", quietly = TRUE)) {
+if (Sys.getenv("NOT_CRAN") == "true") {
+  if (callr:::is_false_check_env_var("_R_CHECK_FORCE_SUGGESTS_")) {
+    if (requireNamespace("testthat", quietly = TRUE)) {
+      library(testthat)
+      test_check("callr")
+    }
+  } else {
     library(testthat)
     test_check("callr")
   }
-} else {
-  library(testthat)
-  test_check("callr")
 }