diff --git a/tests/fixtures.py b/tests/fixtures.py
index c79163d..35c5661 100644
--- a/tests/fixtures.py
+++ b/tests/fixtures.py
@@ -11,7 +11,9 @@ from tests.factories.site import SiteFactory
 
 @pytest.fixture(scope='function')
 def site():
-    site = SiteFactory(is_default_site=True)
+    root_page = ContentPageFactory(parent=None, slug='')
+    site = SiteFactory(is_default_site=True, root_page=root_page)
+
     page1 = ContentPageFactory(parent=site.root_page, slug='page-1')
     page2 = ContentPageFactory(parent=site.root_page, slug='page-2')
     ContentPageFactory(parent=page1, slug='page-1-1')
@@ -21,7 +23,7 @@ def site():
 
 @pytest.fixture
 def segmented_page(site):
-    page = ContentPageFactory(parent=site.root_page)
+    page = ContentPageFactory(parent=site.root_page, slug='personalised')
     segment = SegmentFactory()
     return page.personalisable_metadata.copy_for_segment(segment)
 
diff --git a/tests/unit/test_wagtail_hooks.py b/tests/unit/test_wagtail_hooks.py
new file mode 100644
index 0000000..14df050
--- /dev/null
+++ b/tests/unit/test_wagtail_hooks.py
@@ -0,0 +1,41 @@
+import pytest
+
+from wagtail_personalisation import adapters, wagtail_hooks
+
+
+@pytest.mark.django_db
+def test_serve_variation_no_variant(site, rf):
+    page = site.root_page
+    request = rf.get('/')
+    args = tuple()
+    kwargs = {}
+
+    result = wagtail_hooks.serve_variation(page, request, args, kwargs)
+    assert result is None
+
+
+@pytest.mark.django_db
+def test_serve_variation_with_variant_no_segment(site, rf, segmented_page):
+    request = rf.get('/')
+    args = tuple()
+    kwargs = {}
+
+    page = segmented_page.personalisable_metadata.canonical_page
+    result = wagtail_hooks.serve_variation(page, request, args, kwargs)
+    assert result is None
+
+
+@pytest.mark.django_db
+def test_serve_variation_with_variant_segmented(site, rf, segmented_page):
+    request = rf.get('/')
+    args = tuple()
+    kwargs = {}
+
+    page = segmented_page.personalisable_metadata.canonical_page
+    segment = segmented_page.personalisable_metadata.segment
+
+    adapter = adapters.get_segment_adapter(request)
+    adapter.set_segments([segment])
+
+    result = wagtail_hooks.serve_variation(page, request, args, kwargs)
+    assert result.status_code == 200