diff --git a/.circleci/config.yml b/.circleci/config.yml
index 04d3e1fc24b31..3020abbde310b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1026,6 +1026,9 @@ jobs:
           # kept functional. Must be run separately from above because we cannot
           # run non-parallel tests in the same run as parallel tests.
           test_targets: "benchmark.test_primes"
+      - run:
+          name: Test size benchmarker
+          command: EMTEST_BENCHMARKERS=size ./test/runner benchmark.test_primes
   test-browser-chrome:
     executor: ubuntu-lts
     environment:
diff --git a/test/test_benchmark.py b/test/test_benchmark.py
index e0c833427a758..6a0b79c8786e6 100644
--- a/test/test_benchmark.py
+++ b/test/test_benchmark.py
@@ -314,7 +314,7 @@ def __init__(self, name):
 
   # we will not actually run the benchmarks
   def run(self, args):
-    assert False
+    pass
 
 
 CHEERP_BIN = '/opt/cheerp/bin/'