diff --git a/noxfile.py b/noxfile.py
index 1864da9fe7..d0bbda80fd 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -305,8 +305,10 @@ def run_system(
         "py.test",
         "--quiet",
         "-n=20",
-        # Any individual test taking longer than 10 mins will be terminated.
+        # Any individual test taking longer than 15 mins will be terminated.
         "--timeout=900",
+        # Log 20 slowest tests
+        "--durations=20",
         f"--junitxml={prefix_name}_{session.python}_sponge_log.xml",
     ]
     if print_duration: