diff --git a/sbol3/identified.py b/sbol3/identified.py
index 9f37c3f..971a665 100644
--- a/sbol3/identified.py
+++ b/sbol3/identified.py
@@ -1,8 +1,9 @@
 from __future__ import annotations
+
 import math
 import posixpath
-from typing import Callable, Any, Optional
 import typing
+from typing import Any, Callable, Optional
 from urllib.parse import urlparse
 
 import rdflib
@@ -124,7 +125,7 @@ def __init__(self, identity: str, type_uri: str,
                                       initial_value=[type_uri])
 
     def __str__(self):
-        return '<%s %s>' % (self.__class__.__name__, self.identity)
+        return f'<{self.__class__.__name__} {self.identity}>'
 
     @staticmethod
     def _is_valid_display_id(display_id: str) -> bool:
diff --git a/setup.cfg b/setup.cfg
index 86dde44..d911366 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -17,7 +17,6 @@ disable = abstract-class-instantiated,
           consider-using-get,
           disallowed-name,
           import-outside-toplevel,
-          consider-using-f-string,
           cyclic-import,
           duplicate-code,
           fixme,
diff --git a/test/test_module.py b/test/test_module.py
index d315266..acee7ef 100644
--- a/test/test_module.py
+++ b/test/test_module.py
@@ -100,9 +100,9 @@ def test_identified_constructors(self):
             try:
                 item(*arg_list)
             except TypeError as e:
-                self.fail('Unable to construct sbol3.%s: %s' % (name, e))
+                self.fail(f'Unable to construct sbol3.{name}: {e}')
             except sbol3.ValidationError as e:
-                self.fail('Constructed invalid sbol3.%s: %s' % (name, e))
+                self.fail(f'Constructed invalid sbol3.{name}: {e}')
             if item in abstract_list:
                 # Skip over abstract classes when checking for the
                 # accept method