Index: tests/conftest.py
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new file mode 100644
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,18 @@
+import os
+import pytest
+import shutil
+import subprocess
+
+
+ROOTPATH = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+
+@pytest.fixture(scope='session')
+def temp_site(tmpdir_factory):
+    out_dir = tmpdir_factory.mktemp('temp_out')
+    site_dir = out_dir.join('test_site').strpath
+
+    shutil.copytree(os.path.join(ROOTPATH, 'tests', 'test_site'), site_dir)
+    subprocess.check_call(['hg', 'init', site_dir])
+    subprocess.check_call(['hg', '-R', site_dir, 'commit', '-A', '-m', 'foo'])
+    yield site_dir