diff --git a/tests/test_core.py b/tests/test_core.py
index 3dcd34c..e1b3906 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -20,6 +20,7 @@ from planetmint.transactions.types.elections.election import Election
 from planetmint.lib import Block
 from planetmint.transactions.types.elections.chain_migration_election import ChainMigrationElection
 from planetmint.upsert_validator.validator_election import ValidatorElection
+from planetmint.backend.exceptions import ConnectionError
 from planetmint.upsert_validator.validator_utils import new_validator_set
 from planetmint.tendermint_utils import public_key_to_base64
 from planetmint.version import __tm_supported_versions__
@@ -66,25 +67,19 @@ def test_bigchain_class_default_initialization(config):
     assert planet.validation == BaseValidationRules
 
 
-# def test_bigchain_class_initialization_with_parameters():
-#     from planetmint import Planetmint
-#     from planetmint.backend import Connection
-#     from planetmint.validation import BaseValidationRules
+def test_bigchain_class_initialization_with_parameters():
+    from planetmint import Planetmint
+    from planetmint.backend import Connection
+    from planetmint.validation import BaseValidationRules
     
-#     init_db_kwargs = {
-#         'backend': 'localmongodb',
-#         'host': 'this_is_the_db_host',
-#         'port': 12345,
-#         'name': 'this_is_the_db_name',
-#     }
-#     connection = Connection().connect(**init_db_kwargs)
-#     planet = Planetmint(connection=connection)
-#     assert planet.connection == connection
-#     assert planet.connection.host == init_db_kwargs['host']
-#     assert planet.connection.port == init_db_kwargs['port']
-#     # assert planet.connection.name == init_db_kwargs['name']
-#     assert planet.validation == BaseValidationRules
-#     Connection().connect(backend='tarantool')
+    init_db_kwargs = {
+        'backend': 'localmongodb',
+        'host': 'this_is_the_db_host',
+        'port': 12345,
+        'name': 'this_is_the_db_name',
+    }
+    with pytest.raises(ConnectionError):
+        Connection().connect(**init_db_kwargs)
 
 
 @pytest.mark.bdb