diff --git a/.circleci/config.yml b/.circleci/config.yml
index 8ca0e6b136..2e49b2a778 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -784,7 +784,7 @@ workflows:
               script: ["flaky.sh"]
               job: ["nogroup"]
               jobsize: ["1"]
-              parallelism: 10
+              parallelism: [10]
   build_all:
     unless: << pipeline.parameters.run_flaky_tests >>
     jobs:
@@ -871,7 +871,7 @@ workflows:
               script: ["browser_test.sh"]
               job: ["0","1","2","3","4","5","6","7","8","9"]
               jobsize: ["10"]
-              parallelism: 15
+              parallelism: [15]
       - tests-passed:
           requires:
             - lint