diff --git a/tests/suites/test_suite_pkparse.data b/tests/suites/test_suite_pkparse.data
index bec6f4b901..d170e1e089 100644
--- a/tests/suites/test_suite_pkparse.data
+++ b/tests/suites/test_suite_pkparse.data
@@ -914,21 +914,23 @@ Parse RSA Key #99.8 (PKCS#8 encrypted v2 PBKDF2 AES-256-CBC hmacWithSHA384 DER,
 depends_on:MBEDTLS_AES_C:MBEDTLS_MD_CAN_SHA384:MBEDTLS_PKCS5_C:MBEDTLS_CIPHER_C:MBEDTLS_CIPHER_MODE_CBC:!MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH
 pk_parse_keyfile_rsa:"data_files/rsa_pkcs8_pbes2_pbkdf2_2048_aes256cbc_sha384.der":"PolarSSLTest":0
 
-Parse RSA Key #100.1 (512-bit)
-depends_on:MBEDTLS_PEM_PARSE_C
-pk_parse_keyfile_rsa:"data_files/rsa512.key":"":0
+# Test keys with non-word-aligned sizes.
+# We use sizes that are large enough to exercise PKCS#1 v1.5 signature with
+# the largest supported hashes (SHA-512 and SHA3-512.)
+Parse RSA Key #100 (768-bit)
+pk_parse_keyfile_rsa:"data_files/rsa_pkcs1_768_clear.der":"":0
 
-Parse RSA Key #100.1 (521-bit)
-depends_on:MBEDTLS_PEM_PARSE_C
-pk_parse_keyfile_rsa:"data_files/rsa521.key":"":0
+Parse RSA Key #100 (769-bit)
+pk_parse_keyfile_rsa:"data_files/rsa_pkcs1_769_clear.der":"":0
 
-Parse RSA Key #100.1 (522-bit)
-depends_on:MBEDTLS_PEM_PARSE_C
-pk_parse_keyfile_rsa:"data_files/rsa522.key":"":0
+Parse RSA Key #100 (770-bit)
+pk_parse_keyfile_rsa:"data_files/rsa_pkcs1_770_clear.der":"":0
 
-Parse RSA Key #100.1 (528-bit)
-depends_on:MBEDTLS_PEM_PARSE_C
-pk_parse_keyfile_rsa:"data_files/rsa528.key":"":0
+Parse RSA Key #100 (776-bit)
+pk_parse_keyfile_rsa:"data_files/rsa_pkcs1_776_clear.der":"":0
+
+Parse RSA Key #100 (784-bit)
+pk_parse_keyfile_rsa:"data_files/rsa_pkcs1_784_clear.der":"":0
 
 Parse Public RSA Key #1 (PKCS#8 wrapped)
 depends_on:MBEDTLS_PEM_PARSE_C