diff --git a/src/tests/ftest/launch.py b/src/tests/ftest/launch.py
index 6bc72a3b740..181b5b4dc1e 100755
--- a/src/tests/ftest/launch.py
+++ b/src/tests/ftest/launch.py
@@ -43,7 +43,7 @@
 DEFAULT_DAOS_APP_DIR = os.path.join(os.sep, "scratch")
 DEFAULT_DAOS_TEST_LOG_DIR = os.path.join(os.sep, "var", "tmp", "daos_testing")
 DEFAULT_DAOS_TEST_SHARED_DIR = os.path.expanduser(os.path.join("~", "daos_test"))
-DEFAULT_LOGS_THRESHOLD = "2G"
+DEFAULT_LOGS_THRESHOLD = "2150M"    # 2.1G
 FAILURE_TRIGGER = "00_trigger-launch-failure_00"
 LOG_FILE_FORMAT = "%(asctime)s %(levelname)-5s %(funcName)30s: %(message)s"
 PROVIDER_KEYS = OrderedDict(