diff --git a/frappe/model/db_query.py b/frappe/model/db_query.py
index dd7227df47..3013483ca9 100644
--- a/frappe/model/db_query.py
+++ b/frappe/model/db_query.py
@@ -34,6 +34,7 @@ class DatabaseQuery(object):
 	def __init__(self, doctype, user=None):
 		self.doctype = doctype
 		self.tables = []
+		self.link_tables = []
 		self.conditions = []
 		self.or_conditions = []
 		self.fields = None
@@ -131,7 +132,6 @@ class DatabaseQuery(object):
 		self.run = run
 		self.strict = strict
 		self.ignore_ddl = ignore_ddl
-		self.link_tables = []
 
 		# for contextual user permission check
 		# to determine which user permission is applicable on link field of specific doctype
diff --git a/frappe/tests/test_db_query.py b/frappe/tests/test_db_query.py
index df518ce3cb..c1b2e05266 100644
--- a/frappe/tests/test_db_query.py
+++ b/frappe/tests/test_db_query.py
@@ -53,7 +53,7 @@ class TestReportview(unittest.TestCase):
 
 	def test_link_field_syntax(self):
 		todo = frappe.get_doc(
-			doctype="ToDo", description=f"Test ToDo", allocated_to="Administrator"
+			doctype="ToDo", description="Test ToDo", allocated_to="Administrator"
 		).insert()
 		result = frappe.db.get_all(
 			"ToDo",