diff --git a/.github/workflows/tox-tests.yml b/.github/workflows/tox-tests.yml
index 5538b44..8ff4310 100644
--- a/.github/workflows/tox-tests.yml
+++ b/.github/workflows/tox-tests.yml
@@ -5,6 +5,8 @@ jobs:
   lint:
     name: lint
     runs-on: ubuntu-latest
+    env:
+      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{matrix.python-version}}
diff --git a/pyproject.toml b/pyproject.toml
index 0f27e23..7cbf468 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,9 +41,9 @@ black = "^21.7b0"
 tox-pyenv = "^1.1.0"
 PyMySQL = "^1.0.2"
 cryptography = "^3.4.7"
+psycopg2-binary = "^2.9.3"
 ibm-db = "^3.1.1"
 ibm-db-sa = "^0.3.7"
-psycopg2-binary = "^2.9.3"
 
 [tool.pytest.ini_options]
 markers = [
diff --git a/rgsync/Connectors/cql_connector.py b/rgsync/Connectors/cql_connector.py
index 2116eb2..645d46d 100644
--- a/rgsync/Connectors/cql_connector.py
+++ b/rgsync/Connectors/cql_connector.py
@@ -44,9 +44,7 @@ def Connect(self):
 
         ConnectionStr = self._getConnectionStr()
 
-        WriteBehindLog(
-            f"Connect: connecting db={self.db} keyspace={self.keyspace}"
-        )
+        WriteBehindLog(f"Connect: connecting db={self.db} keyspace={self.keyspace}")
         auth_provider = PlainTextAuthProvider(
             username=self.user, password=self.password
         )
diff --git a/rgsync/Connectors/sql_connectors.py b/rgsync/Connectors/sql_connectors.py
index 1ceb710..10d9db1 100644
--- a/rgsync/Connectors/sql_connectors.py
+++ b/rgsync/Connectors/sql_connectors.py
@@ -126,6 +126,14 @@ def _getConnectionStr(self):
         return f"db2://{self.user}:{self.passwd}@{self.db}"
 
 
+class DB2Connection(BaseSqlConnection):
+    def __init__(self, user, passwd, db):
+        BaseSqlConnection.__init__(self, user, passwd, db)
+
+    def _getConnectionStr(self):
+        return f"db2://{self.user}:{self.passwd}@{self.db}"
+
+
 class BaseSqlConnector:
     def __init__(self, connection, tableName, pk, exactlyOnceTableName=None):
         self.connection = connection
diff --git a/rgsync/redis_gears_write_behind.py b/rgsync/redis_gears_write_behind.py
index 3fb554e..cdc1978 100644
--- a/rgsync/redis_gears_write_behind.py
+++ b/rgsync/redis_gears_write_behind.py
@@ -269,9 +269,7 @@ def __init__(self, mappings, connector, name, version=None):
             # cases like mongo, that don't implement this, silence the warning
             if "object has no attribute 'PrepereQueries'" in str(e):
                 return
-            WriteBehindLog(
-                f'Skip calling PrepereQueries of connector, err="{str(e)}"'
-            )
+            WriteBehindLog(f'Skip calling PrepereQueries of connector, err="{str(e)}"')
 
 
 def DeleteKeyIfNeeded(r):
diff --git a/tests/test_mongowritebehind.py b/tests/test_mongowritebehind.py
index b1de5cf..8e9f147 100644
--- a/tests/test_mongowritebehind.py
+++ b/tests/test_mongowritebehind.py
@@ -32,9 +32,7 @@ def setup_class(cls):
         dbpasswd = docker["MONGO_INITDB_ROOT_PASSWORD"]
         db = docker["MONGO_DB"]
 
-        con = (
-            f"mongodb://{dbuser}:{dbpasswd}@172.17.0.1:27017/{db}?authSource=admin"
-        )
+        con = f"mongodb://{dbuser}:{dbpasswd}@172.17.0.1:27017/{db}?authSource=admin"
 
         script = """
 from rgsync import RGJSONWriteBehind, RGJSONWriteThrough
@@ -228,9 +226,7 @@ def setup_class(cls):
         dbpasswd = docker["MONGO_INITDB_ROOT_PASSWORD"]
         db = docker["MONGO_DB"]
 
-        con = (
-            f"mongodb://{dbuser}:{dbpasswd}@172.17.0.1:27017/{db}?authSource=admin"
-        )
+        con = f"mongodb://{dbuser}:{dbpasswd}@172.17.0.1:27017/{db}?authSource=admin"
 
         script = f"""
 from rgsync import RGJSONWriteBehind, RGJSONWriteThrough
@@ -279,9 +275,7 @@ def setup_class(cls):
         dbpasswd = docker["MONGO_INITDB_ROOT_PASSWORD"]
         db = docker["MONGO_DB"]
 
-        con = (
-            f"mongodb://{dbuser}:{dbpasswd}@172.17.0.1:27017/{db}?authSource=admin"
-        )
+        con = f"mongodb://{dbuser}:{dbpasswd}@172.17.0.1:27017/{db}?authSource=admin"
 
         script = """
 from rgsync import RGJSONWriteBehind, RGJSONWriteThrough
diff --git a/tests/test_sqlwritebehind.py b/tests/test_sqlwritebehind.py
index f24581e..e341ac1 100644
--- a/tests/test_sqlwritebehind.py
+++ b/tests/test_sqlwritebehind.py
@@ -94,6 +94,10 @@ def testWriteBehindAck(self):
         res = result.fetchone()
         assert res == ("1", "foo", "bar", 22)
 
+        result = self.dbconn.execute(text("select * from persons"))
+        res = result.fetchone()
+        assert res == ("1", "foo", "bar", 22)
+
         # delete from database
         self.env.execute_command("hset", "person:1", "#", "~2")
         res = None