diff --git a/src/tests/ftest/util/server_utils_params.py b/src/tests/ftest/util/server_utils_params.py
index b62c6fee2d5..dd613cd56a8 100644
--- a/src/tests/ftest/util/server_utils_params.py
+++ b/src/tests/ftest/util/server_utils_params.py
@@ -495,7 +495,7 @@ def __init__(self, base_namespace, index, provider=None, max_storage_tiers=MAX_S
             "DAOS_MD_CAP=1024",
             "DAOS_SCHED_WATCHDOG_ALL=1",
             "DD_MASK=mgmt,io,md,epc,rebuild",
-            "ABT_THREAD_STACKSIZE=32768",
+            "ABT_THREAD_STACKSIZE=24576",
             "PMEMOBJ_CONF=sds.at_create=0",
         ]
         default_env_vars.extend(self.REQUIRED_ENV_VARS["common"])