diff --git a/test/test_transforms.py b/test/test_transforms.py
index 20bf5b0c0f7..d9c219ee526 100644
--- a/test/test_transforms.py
+++ b/test/test_transforms.py
@@ -4,6 +4,7 @@
 # LICENSE file in the root directory of this source tree.
 import argparse
 from copy import copy
+from time import sleep
 
 import pytest
 import torch
@@ -154,6 +155,8 @@ def test_vecnorm_parallel(nprc):
     for idx in range(nprc):
         queues[idx][1].put(msg)
     del queues
+    for p in prcs:
+        p.join()
 
 
 def _test_vecnorm_subproc_auto(idx, make_env, queue_out: mp.Queue, queue_in: mp.Queue):
@@ -219,6 +222,9 @@ def test_vecnorm_parallel_auto(nprc):
     for idx in range(nprc):
         queues[idx][1].put(msg)
 
+    sleep(0.01)  # Further fix for flacky test: vecnorm should have a locking
+    # mechanism
+
     obs_sum = td.get("next_observation_sum").clone()
     obs_ssq = td.get("next_observation_ssq").clone()
     obs_count = td.get("next_observation_count").clone()