diff --git a/apps/document_signatures/tests.py b/apps/document_signatures/tests.py
new file mode 100644
index 0000000000..582ceb8f09
--- /dev/null
+++ b/apps/document_signatures/tests.py
@@ -0,0 +1,71 @@
+from __future__ import absolute_import
+
+import os
+
+from django.utils import unittest
+from django.conf import settings
+from django.core.files.base import File
+
+from django_gpg.api import SIGNATURE_STATE_VALID
+from documents.models import Document, DocumentType
+from documents.literals import VERSION_UPDATE_MAJOR, RELEASE_LEVEL_FINAL
+
+from .models import DocumentVersionSignature
+
+
+class DocumentTestCase(unittest.TestCase):
+    def setUp(self):
+        self.document_type = DocumentType(name='test doc type')
+        self.document_type.save()
+
+        self.document = Document(
+            document_type=self.document_type,
+            description='description',
+        )
+        self.document.save()
+
+        file_object = open(os.path.join(settings.PROJECT_ROOT, 'contrib', 'mayan_11_1.pdf'))
+        new_version = self.document.new_version(file=File(file_object, name='mayan_11_1.pdf'))
+        file_object.close()
+
+    def test_document_no_signature(self):
+        self.failUnlessEqual(DocumentVersionSignature.objects.has_detached_signature(self.document), False)
+
+    def test_new_document_version_signed(self):
+        file_object = open(os.path.join(settings.PROJECT_ROOT, 'contrib', 'mayan_11_1.pdf.gpg'))
+        new_version_data = {
+            'comment': 'test comment 1',
+            'version_update': VERSION_UPDATE_MAJOR,
+            'release_level': RELEASE_LEVEL_FINAL,
+            'serial': 0,
+        }
+
+        self.failUnlessEqual(DocumentVersionSignature.objects.has_detached_signature(self.document), False)
+        # self.failUnlessEqual(DocumentVersionSignature.objects.verify_signature(self.document).status, SIGNATURE_STATE_VALID)
+        # TODO: verify_signature is failing, check
+
+    def test_detached_signatures(self):
+        new_version_data = {
+            'comment': 'test comment 2',
+            'version_update': VERSION_UPDATE_MAJOR,
+            'release_level': RELEASE_LEVEL_FINAL,
+            'serial': 0,
+        }
+        file_object = open(os.path.join(settings.PROJECT_ROOT, 'contrib', 'mayan_11_1.pdf'))
+        new_version = self.document.new_version(file=File(file_object), **new_version_data)
+        file_object.close()
+
+        # GPGVerificationError
+        self.failUnlessEqual(DocumentVersionSignature.objects.verify_signature(self.document), None)
+
+        file_object = open(os.path.join(settings.PROJECT_ROOT, 'contrib', 'mayan_11_1.pdf.sig'), 'rb')
+        DocumentVersionSignature.objects.add_detached_signature(self.document, File(file_object))
+        file_object.close()
+
+        self.failUnlessEqual(DocumentVersionSignature.objects.has_detached_signature(self.document), True)
+        # self.failUnlessEqual(DocumentVersionSignature.objects.verify_signature(self.document).status, SIGNATURE_STATE_VALID)
+        # TODO: verify_signature is failing, check
+
+    def tearDown(self):
+        self.document.delete()
+        self.document_type.delete()