diff --git a/ironic/objects/fields.py b/ironic/objects/fields.py
index 528e998b26..1b77789450 100644
--- a/ironic/objects/fields.py
+++ b/ironic/objects/fields.py
@@ -14,8 +14,6 @@
 #    under the License.
 
 import ast
-import hashlib
-import inspect
 
 from oslo_versionedobjects import fields as object_fields
 
@@ -57,10 +55,7 @@ class StringFieldThatAcceptsCallable(object_fields.StringField):
         default = self._default
         if (self._default != object_fields.UnspecifiedDefault
                 and callable(self._default)):
-            default = "%s-%s" % (
-                self._default.__name__,
-                hashlib.md5(inspect.getsource(
-                    self._default).encode()).hexdigest())
+            default = '<function %s>' % default.__name__
         return '%s(default=%s,nullable=%s)' % (self._type.__class__.__name__,
                                                default, self._nullable)
 
diff --git a/ironic/tests/unit/objects/test_fields.py b/ironic/tests/unit/objects/test_fields.py
index 02ce1222d9..35cc050e60 100644
--- a/ironic/tests/unit/objects/test_fields.py
+++ b/ironic/tests/unit/objects/test_fields.py
@@ -13,9 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import hashlib
-import inspect
-
 from ironic.common import exception
 from ironic.objects import fields
 from ironic.tests import base as test_base
@@ -73,8 +70,6 @@ class TestStringFieldThatAcceptsCallable(test_base.TestCase):
         def test_default_function():
             return "default value"
 
-        self.test_default_function_hash = hashlib.md5(
-            inspect.getsource(test_default_function).encode()).hexdigest()
         self.field = fields.StringFieldThatAcceptsCallable(
             default=test_default_function)
 
@@ -102,8 +97,8 @@ class TestStringFieldThatAcceptsCallable(test_base.TestCase):
                          self.field.coerce('obj', 'attr', None))
 
     def test__repr__includes_default_function_name_and_source_hash(self):
-        expected = ('StringAcceptsCallable(default=test_default_function-%s,'
-                    'nullable=False)' % self.test_default_function_hash)
+        expected = ('StringAcceptsCallable(default=<function '
+                    'test_default_function>,nullable=False)')
         self.assertEqual(expected, repr(self.field))
 
 
diff --git a/tools/bandit.yml b/tools/bandit.yml
index d99694d395..028d1a214d 100644
--- a/tools/bandit.yml
+++ b/tools/bandit.yml
@@ -89,7 +89,6 @@ tests:
 # (optional) list skipped test IDs here, eg '[B101, B406]':
 skips:
   - B104
-  - B303
   - B604
 
 ### (optional) plugin settings - some test plugins require configuration data