diff --git a/cmdeploy/src/cmdeploy/tests/online/benchmark.py b/cmdeploy/src/cmdeploy/tests/online/benchmark.py
index 01de017b..c65292b5 100644
--- a/cmdeploy/src/cmdeploy/tests/online/benchmark.py
+++ b/cmdeploy/src/cmdeploy/tests/online/benchmark.py
@@ -1,3 +1,4 @@
+import time
 def test_tls_imap(benchmark, imap):
     def imap_connect():
         imap.connect()
@@ -57,4 +58,4 @@ class TestDC:
             for i in range(10):
                 ac2._evtracker.wait_next_incoming_message()
 
-        benchmark(dc_send_10_receive_10, 5)
+        benchmark(dc_send_10_receive_10, 5, cooldown="auto")
diff --git a/cmdeploy/src/cmdeploy/tests/plugin.py b/cmdeploy/src/cmdeploy/tests/plugin.py
index 60d27efc..3f6a4333 100644
--- a/cmdeploy/src/cmdeploy/tests/plugin.py
+++ b/cmdeploy/src/cmdeploy/tests/plugin.py
@@ -91,15 +91,22 @@ def cm_data(request):
 
 
 @pytest.fixture
-def benchmark(request):
-    def bench(func, num, name=None, reportfunc=None):
+def benchmark(request, chatmail_config):
+    def bench(func, num, name=None, reportfunc=None, cooldown=0.0):
         if name is None:
             name = func.__name__
+        if cooldown == "auto":
+            per_minute = max(chatmail_config.max_user_send_per_minute, 1)
+            cooldown = chatmail_config.max_user_send_burst_size * 60 / per_minute
+
         durations = []
         for i in range(num):
             now = time.time()
             func()
             durations.append(time.time() - now)
+            if cooldown > 0 and i + 1 < num:
+                # Keep post-run cooldown out of measured benchmark duration.
+                time.sleep(cooldown)
         durations.sort()
         request.config._benchresults[name] = (reportfunc, durations)