diff --git a/components/esp_hw_support/test/gen_digital_signature_tests.py b/components/esp_hw_support/test/gen_digital_signature_tests.py
index 9e50c10466..d9ceee5476 100644
--- a/components/esp_hw_support/test/gen_digital_signature_tests.py
+++ b/components/esp_hw_support/test/gen_digital_signature_tests.py
@@ -8,11 +8,12 @@ import struct
 
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives.asymmetric import rsa
+from cryptography.hazmat.primitives.asymmetric.rsa import _modinv as modinv  # type: ignore
 from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
 from cryptography.utils import int_to_bytes
 
 
-def number_as_bignum_words(number):
+def number_as_bignum_words(number):  # type: (int) -> str
     """
     Given a number, format result as a C array of words
     (little-endian, same as ESP32 RSA peripheral or mbedTLS)
@@ -24,17 +25,17 @@ def number_as_bignum_words(number):
     return '{ ' + ', '.join(result) + ' }'
 
 
-def number_as_bytes(number, pad_bits=None):
+def number_as_bytes(number, pad_bits=None):  # type: (int, int) -> bytes
     """
     Given a number, format as a little endian array of bytes
     """
-    result = int_to_bytes(number)[::-1]
+    result = int_to_bytes(number)[::-1]  # type: bytes
     while pad_bits is not None and len(result) < (pad_bits // 8):
         result += b'\x00'
     return result
 
 
-def bytes_as_char_array(b):
+def bytes_as_char_array(b):  # type: (bytes) -> str
     """
     Given a sequence of bytes, format as a char array
     """
@@ -96,7 +97,7 @@ with open('digital_signature_test_cases.h', 'w') as f:
 
         rr = 1 << (key_size * 2)
         rinv = rr % pub_numbers.n
-        mprime = - rsa._modinv(M, 1 << 32)
+        mprime = - modinv(M, 1 << 32)
         mprime &= 0xFFFFFFFF
         length = key_size // 32 - 1
 
diff --git a/tools/ci/mypy_ignore_list.txt b/tools/ci/mypy_ignore_list.txt
index 65bce5e72d..84c2132cd0 100644
--- a/tools/ci/mypy_ignore_list.txt
+++ b/tools/ci/mypy_ignore_list.txt
@@ -3,7 +3,6 @@ components/efuse/efuse_table_gen.py
 components/efuse/test_efuse_host/efuse_tests.py
 components/esp_local_ctrl/python/esp_local_ctrl_pb2.py
 components/esp_netif/test_apps/component_ut_test.py
-components/esp_hw_support/test/gen_digital_signature_tests.py
 components/espcoredump/corefile/elf.py
 components/espcoredump/corefile/gdb.py
 components/espcoredump/test/test_espcoredump.py