diff --git a/scripts/mbedtls_dev/bignum_common.py b/scripts/mbedtls_dev/bignum_common.py
index 1eb4ca7dfb..8b11bc283c 100644
--- a/scripts/mbedtls_dev/bignum_common.py
+++ b/scripts/mbedtls_dev/bignum_common.py
@@ -14,9 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import itertools
-import typing
-
 from abc import abstractmethod
 from typing import Iterator, List, Tuple, TypeVar
 
@@ -42,7 +39,7 @@ def hex_to_int(val: str) -> int:
 
     This is a superset of what is accepted by mbedtls_test_read_mpi_core().
     """
-    if val == '' or val == '-':
+    if val in ['', '-']:
         return 0
     return int(val, 16)
 
diff --git a/tests/scripts/generate_bignum_tests.py b/tests/scripts/generate_bignum_tests.py
index f1b24409ea..eee2f657ad 100755
--- a/tests/scripts/generate_bignum_tests.py
+++ b/tests/scripts/generate_bignum_tests.py
@@ -85,6 +85,7 @@ class BignumOperation(bignum_common.OperationCommon, BignumTarget, metaclass=ABC
     ]
 
     def description_suffix(self) -> str:
+        #pylint: disable=no-self-use # derived classes need self
         """Text to add at the end of the test case description."""
         return ""