diff --git a/tests/test_blob.py b/tests/test_blob.py
new file mode 100644
index 0000000..857c369
--- /dev/null
+++ b/tests/test_blob.py
@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# This file is under GNU Affero General Public License 3.0
+# see LICENSE.txt
+
+"""Blob unit tests."""
+
+import pytest
+
+from . import constants
+from . import model
+
+def test_blob_data_constructor(pEp, model):
+    bdata = bytes('this is test data', 'utf-8')
+    b = pEp.Blob(bdata)
+    assert(b.data == bdata)
+
+def test_blob_data_property(pEp, model):
+    b = pEp.Blob(b'dummy')
+    bdata = bytes('this is test data', 'utf-8')
+    b.data = bdata
+    assert(b.data == bdata)