diff --git a/integration-tests/test_hub.py b/integration-tests/test_hub.py
index e2493ab..550e1ab 100644
--- a/integration-tests/test_hub.py
+++ b/integration-tests/test_hub.py
@@ -1,6 +1,7 @@
 import requests
 from hubtraf.user import User
 from hubtraf.auth.dummy import login_dummy
+from jupyterhub.utils import exponential_backoff
 import secrets
 import pytest
 from functools import partial
@@ -10,7 +11,6 @@ import grp
 import sys
 import subprocess
 from tljh.normalize import generate_system_username
-import time
 
 
 # Use sudo to invoke it, since this is how users invoke it.
@@ -142,9 +142,10 @@ async def test_long_username():
 
 
 @pytest.mark.asyncio
-async def test_idle_culler  ():
+async def test_idle_server_culled():
     """
-    User logs in, starts a server & stays idle for 1 min
+    User logs in, starts a server & stays idle for 1 min.
+    (the user's server should be culled during this period)
     """
     # This *must* be localhost, not an IP
     # aiohttp throws away cookies if we are connecting to an IP!
@@ -171,8 +172,65 @@ async def test_idle_culler  ():
             r = await u.session.get(u.hub_url / 'hub/api/users' / username,
                 headers={'Referer': str(u.hub_url / 'hub/')})
             assert r.status == 200
-            time.sleep(60)
-            # Check that after 60s, the user and server have been culled and are not reacheable anymore
+
+            async def _check_culling_done():
+                # Check that after 60s, the user and server have been culled and are not reacheable anymore
+                r = await u.session.get(u.hub_url / 'hub/api/users' / username,
+                    headers={'Referer': str(u.hub_url / 'hub/')})
+                print(r.status)
+                return r.status == 403
+
+            await exponential_backoff(
+                _check_culling_done,
+                "Server culling failed!",
+                timeout=100,
+            )
+
+@pytest.mark.asyncio
+async def test_active_server_not_culled():
+    """
+    User logs in, starts a server & stays idle for 30s
+    (the user's server should not be culled during this period).
+    """
+    # This *must* be localhost, not an IP
+    # aiohttp throws away cookies if we are connecting to an IP!
+    hub_url = 'http://localhost'
+    username = secrets.token_hex(8)
+
+    assert 0 == await (await asyncio.create_subprocess_exec(*TLJH_CONFIG_PATH, 'set', 'auth.type', 'dummyauthenticator.DummyAuthenticator')).wait()
+    # Check every 10s for idle servers to cull
+    assert 0 == await (await asyncio.create_subprocess_exec(*TLJH_CONFIG_PATH, 'set', 'services.cull.every', "10")).wait()
+    # Apart from servers, also cull users
+    assert 0 == await (await asyncio.create_subprocess_exec(*TLJH_CONFIG_PATH, 'set', 'services.cull.users', "True")).wait()
+    # Cull servers and users after 60s of activity
+    assert 0 == await (await asyncio.create_subprocess_exec(*TLJH_CONFIG_PATH, 'set', 'services.cull.max_age', "60")).wait()
+    assert 0 == await (await asyncio.create_subprocess_exec(*TLJH_CONFIG_PATH, 'reload')).wait()
+
+    async with User(username, hub_url, partial(login_dummy, password='')) as u:
+            await u.login()
+            # Start user's server
+            await u.ensure_server()
+            # Assert that the user exists
+            assert pwd.getpwnam(f'jupyter-{username}') is not None
+
+            # Check that we can get to the user's server
             r = await u.session.get(u.hub_url / 'hub/api/users' / username,
                 headers={'Referer': str(u.hub_url / 'hub/')})
-            assert r.status == 403
+            assert r.status == 200
+
+            async def _check_culling_done():
+                # Check that after 30s, we can still reach the user's server
+                r = await u.session.get(u.hub_url / 'hub/api/users' / username,
+                    headers={'Referer': str(u.hub_url / 'hub/')})
+                print(r.status)
+                return r.status != 200
+
+            try:
+                await exponential_backoff(
+                    _check_culling_done,
+                    "User's server is still reacheable!",
+                    timeout=30,
+                )
+            except TimeoutError:
+                # During the 30s timeout the user's server wasn't culled, which is what we intended.
+                pass
diff --git a/tests/test_configurer.py b/tests/test_configurer.py
index 641e407..cfd8d3c 100644
--- a/tests/test_configurer.py
+++ b/tests/test_configurer.py
@@ -3,6 +3,7 @@ Test configurer
 """
 
 import os
+import sys
 
 from tljh import configurer
 
@@ -187,6 +188,52 @@ def test_set_traefik_api():
     assert c.TraefikTomlProxy.traefik_api_password == '1234'
 
 
+def test_cull_service_default():
+    """
+    Test default cull service settings with no overrides
+    """
+    c = apply_mock_config({})
+
+    cull_cmd = [
+       sys.executable, '/srv/src/tljh/cull_idle_servers.py',
+       '--timeout', '600', '--cull-every', '60', '--concurrency', '5',
+       '--max-age', '0'
+    ]
+    assert c.JupyterHub.services == [{
+        'name': 'cull-idle',
+        'admin': True,
+        'command': cull_cmd,
+    }]
+    assert c.TraefikTomlProxy.traefik_api_username == 'api_admin'
+
+
+def test_set_cull_service():
+    """
+    Test setting cull service options
+    """
+    c = apply_mock_config({
+        'services': {
+            'cull': {
+                'every': 10,
+                'users': True,
+                'max_age': 60
+            }
+        }
+    })
+    cull_cmd = [
+       sys.executable, '/srv/src/tljh/cull_idle_servers.py',
+       '--timeout', '600', '--cull-every', '10', '--concurrency', '5',
+       '--max-age', '60', '--cull-users'
+    ]
+    assert c.JupyterHub.services == [{
+        'name': 'cull-idle',
+        'admin': True,
+        'command': cull_cmd,
+    }]
+    assert c.TraefikTomlProxy.traefik_api_username == 'api_admin'
+
+
+
 def test_load_secrets(tljh_dir):
     """
     Test loading secret files