diff --git a/tests/olevba/__init__.py b/tests/olevba/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/olevba/__init__.py
diff --git a/tests/olevba/test_basic.py b/tests/olevba/test_basic.py
new file mode 100644
index 0000000..d319a12
--- /dev/null
+++ b/tests/olevba/test_basic.py
@@ -0,0 +1,45 @@
+"""
+Test basic functionality of olevba[3]
+"""
+
+import unittest
+import sys
+if sys.version_info.major <= 2:
+    from oletools import olevba
+else:
+    from oletools import olevba3 as olevba
+import os
+from os.path import join
+
+# Directory with test data, independent of current working directory
+from tests.test_utils import DATA_BASE_DIR
+
+
+class TestOlevbaBasic(unittest.TestCase):
+    """Tests olevba basic functionality"""
+
+    def test_crypt_return(self):
+        """
+        Tests that encrypted files give a certain return code.
+
+        Currently, only the encryption applied by Office 2010 (CryptoApi RC4
+        Encryption) is tested.
+        """
+        CRYPT_DIR = join(DATA_BASE_DIR, 'encrypted')
+        CRYPT_RETURN_CODE = 9
+        ADD_ARGS = [], ['-d', ], ['-a', ], ['-j', ], ['-t', ]
+        for filename in os.listdir(CRYPT_DIR):
+            full_name = join(CRYPT_DIR, filename)
+            for args in ADD_ARGS:
+                try:
+                    ret_code = olevba.main(args + [full_name, ])
+                except SystemExit as se:
+                    ret_code = se.code or 0   # se.code can be None
+                self.assertEqual(ret_code, CRYPT_RETURN_CODE,
+                                 msg='Wrong return code {} for args {}'
+                                     .format(ret_code, args + [filename, ]))
+
+
+# just in case somebody calls this file as a script
+if __name__ == '__main__':
+    unittest.main()