diff --git a/src/documents/tests/test_admin.py b/src/documents/tests/test_admin.py
new file mode 100644
index 000000000..b280c43ea
--- /dev/null
+++ b/src/documents/tests/test_admin.py
@@ -0,0 +1,57 @@
+from unittest import mock
+
+from django.contrib.admin.sites import AdminSite
+from django.test import TestCase
+from django.utils import timezone
+
+from documents.admin import DocumentAdmin
+from documents.models import Document, Tag
+
+
+class TestDocumentAdmin(TestCase):
+
+    def setUp(self) -> None:
+        self.doc_admin = DocumentAdmin(model=Document, admin_site=AdminSite())
+
+    @mock.patch("documents.admin.index.add_or_update_document")
+    def test_save_model(self, m):
+        doc = Document.objects.create(title="test")
+        doc.title = "new title"
+        self.doc_admin.save_model(None, doc, None, None)
+        self.assertEqual(Document.objects.get(id=doc.id).title, "new title")
+        m.assert_called_once()
+
+    def test_tags(self):
+        doc = Document.objects.create(title="test")
+        doc.tags.create(name="t1")
+        doc.tags.create(name="t2")
+
+        self.assertEqual(self.doc_admin.tags_(doc), "<span >t1, </span><span >t2, </span>")
+
+    def test_tags_empty(self):
+        doc = Document.objects.create(title="test")
+
+        self.assertEqual(self.doc_admin.tags_(doc), "")
+
+    @mock.patch("documents.admin.index.remove_document")
+    def test_delete_model(self, m):
+        doc = Document.objects.create(title="test")
+        self.doc_admin.delete_model(None, doc)
+        self.assertRaises(Document.DoesNotExist, Document.objects.get, id=doc.id)
+        m.assert_called_once()
+
+    @mock.patch("documents.admin.index.remove_document")
+    def test_delete_queryset(self, m):
+        for i in range(42):
+            Document.objects.create(title="Many documents with the same title", checksum=f"{i:02}")
+
+        self.assertEqual(Document.objects.count(), 42)
+
+        self.doc_admin.delete_queryset(None, Document.objects.all())
+
+        self.assertEqual(m.call_count, 42)
+        self.assertEqual(Document.objects.count(), 0)
+
+    def test_created(self):
+        doc = Document.objects.create(title="test", created=timezone.datetime(2020, 4, 12))
+        self.assertEqual(self.doc_admin.created_(doc), "2020-04-12")