diff --git a/.circleci/create_circleci_config.py b/.circleci/create_circleci_config.py
index 49c46c2b83d..f03506af52e 100644
--- a/.circleci/create_circleci_config.py
+++ b/.circleci/create_circleci_config.py
@@ -152,7 +152,7 @@ class CircleCIJob:
             tests = " ".join(expanded_tests)
 
             # Each executor to run ~10 tests
-            n_executors = max(len(tests) // 10, 1)
+            n_executors = max(len(expanded_tests) // 10, 1)
             # Avoid empty test list on some executor(s) or launching too many executors
             if n_executors > self.parallelism:
                 n_executors = self.parallelism