diff --git a/tests/__init__.py b/tests/__init__.py
index ce4eff79..30673c5f 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,7 +1,5 @@
 import io
-import os.path
 import pkgutil
-import shutil
 
 
 def get_egg_data(basename):
@@ -10,12 +8,3 @@ def get_egg_data(basename):
 
 def root_add_version(root, project, version, basename):
     root.eggstorage.put(io.BytesIO(get_egg_data(basename)), project, version)
-
-
-def clean(config, setting):
-    directory = os.path.realpath(config.get(setting))
-    basedir = os.path.realpath(os.path.dirname(os.path.dirname(__file__)))
-    # Avoid accidentally deleting directories outside the project.
-    assert os.path.commonprefix((directory, basedir)) == basedir
-    if os.path.exists(directory):
-        shutil.rmtree(directory)
diff --git a/tests/conftest.py b/tests/conftest.py
index a77dfe8d..2aae8dd2 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -6,7 +6,7 @@
 from scrapyd import Config
 from scrapyd.app import application
 from scrapyd.website import Root
-from tests import clean, root_add_version
+from tests import root_add_version
 
 
 @pytest.fixture()
@@ -16,18 +16,22 @@ def txrequest():
     return Request(http_channel)
 
 
-@pytest.fixture(params=[None, ("scrapyd", "items_dir", "items")], ids=["default", "items_dir"])
-def root(request):
+@pytest.fixture()
+def chdir(monkeypatch, tmpdir):
+    monkeypatch.chdir(tmpdir)
+
+    return tmpdir
+
+
+@pytest.fixture(params=[None, (Config.SECTION, "items_dir", "items")], ids=["default", "items_dir"])
+def root(request, chdir):
     config = Config()
     if request.param:
         config.cp.set(*request.param)
 
     app = application(config)
 
-    yield Root(config, app)
-
-    for setting in ("dbs_dir", "eggs_dir"):
-        clean(config, setting)
+    return Root(config, app)
 
 
 @pytest.fixture()
diff --git a/tests/mockserver.py b/tests/mockserver.py
index 6ba50c54..f7f92c76 100644
--- a/tests/mockserver.py
+++ b/tests/mockserver.py
@@ -1,6 +1,4 @@
-import os
 import re
-import shutil
 import socket
 import sys
 from subprocess import PIPE, Popen
@@ -26,21 +24,17 @@ def __enter__(self, authentication=None):
         if self.authentication is not None:
             command.append("--auth=" + self.authentication)
 
-        self.proc = Popen(command, stdout=PIPE)
+        self.process = Popen(command, stdout=PIPE)
         for _ in range(10):
-            msg = self.proc.stdout.readline().strip().decode("ascii")
-            addr_line = re.search("available at (.+/)", msg)
-            if addr_line:
-                self.url = addr_line.group(1)
+            if address := re.search("available at (.+/)", self.process.stdout.readline().strip().decode("ascii")):
+                self.url = address.group(1)
                 break
 
         return self
 
     def __exit__(self, exc_type, exc_value, traceback):
-        self.proc.kill()
-        self.proc.communicate()
-        if os.path.isdir("eggs") and os.listdir("eggs") != []:
-            shutil.rmtree("eggs")
+        self.process.terminate()
+        self.process.communicate()
 
     def urljoin(self, path):
         return urljoin(self.url, path)
diff --git a/tests/test_eggstorage.py b/tests/test_eggstorage.py
index 31dbf176..86fa315c 100644
--- a/tests/test_eggstorage.py
+++ b/tests/test_eggstorage.py
@@ -51,7 +51,7 @@ def test_sorted_versions(versions, expected):
     assert sorted_versions(versions) == expected
 
 
-def test_config():
+def test_config(chdir):
     config = Config()
     config.cp.set("scrapyd", "eggstorage", "tests.test_eggstorage.FakeEggStorage")
 
diff --git a/tests/test_endpoints.py b/tests/test_endpoints.py
index afe14436..a12a762f 100644
--- a/tests/test_endpoints.py
+++ b/tests/test_endpoints.py
@@ -84,7 +84,7 @@ def test_spider_list_project_no_egg(mock_scrapyd):
     assert data["status"] == "ok"
 
 
-def test_addversion_and_delversion(mock_scrapyd, quotesbot_egg):
+def test_addversion_and_delversion(chdir, mock_scrapyd, quotesbot_egg):
     resp = _deploy(mock_scrapyd, quotesbot_egg)
     data = resp.json()
 
@@ -100,7 +100,7 @@ def test_addversion_and_delversion(mock_scrapyd, quotesbot_egg):
     assert res.json()["status"] == "ok"
 
 
-def test_failed_settings(mock_scrapyd, quotesbot_egg_asyncio):
+def test_failed_settings(chdir, mock_scrapyd, quotesbot_egg_asyncio):
     response = _deploy(mock_scrapyd, quotesbot_egg_asyncio)
 
     assert response.status_code == 200
diff --git a/tests/test_webservice.py b/tests/test_webservice.py
index 22d38756..367427b3 100644
--- a/tests/test_webservice.py
+++ b/tests/test_webservice.py
@@ -5,20 +5,17 @@
 import pytest
 from twisted.web import error
 
-from scrapyd.config import Config
 from scrapyd.exceptions import DirectoryTraversalError, RunnerError
 from scrapyd.interfaces import IEggStorage, IJobStorage
 from scrapyd.jobstorage import Job
 from scrapyd.txapp import application
 from scrapyd.webservice import UtilsCache, get_spider_list
-from tests import clean, get_egg_data, root_add_version
+from tests import get_egg_data, root_add_version
 
 
 @pytest.fixture()
-def app():
-    yield application
-
-    clean(Config(), "eggs_dir")
+def app(chdir):
+    return application
 
 
 def add_test_version(app, project, version, basename):