diff --git a/test/test_transforms.py b/test/test_transforms.py
index a597d5afc4b..91e1e5c2d4b 100644
--- a/test/test_transforms.py
+++ b/test/test_transforms.py
@@ -217,7 +217,8 @@ def test_vecnorm_parallel_auto(nprc):
     for idx in range(nprc):
         queues[idx][1].put(msg)
 
-    # sleep(0.01)
+    for p in prcs:
+        p.join()
     obs_sum = td.get("next_observation_sum").clone()
     obs_ssq = td.get("next_observation_ssq").clone()
     obs_count = td.get("next_observation_count").clone()