diff --git a/tests/ci/stress.py b/tests/ci/stress.py
index 5e151e6c098..953b55dbf63 100755
--- a/tests/ci/stress.py
+++ b/tests/ci/stress.py
@@ -6,6 +6,7 @@ import os
 import argparse
 import logging
 import time
+import random
 
 
 def get_options(i, upgrade_check):
@@ -43,6 +44,10 @@ def get_options(i, upgrade_check):
             client_options.append("join_algorithm='auto'")
             client_options.append("max_rows_in_join=1000")
 
+    if i > 0 and random.random() < 1 / 3:
+        client_options.append("allow_experimental_query_cache=1")
+        client_options.append("use_query_cache=1")
+
     if i % 5 == 1:
         client_options.append("memory_tracker_fault_probability=0.001")