diff --git a/tests/suites/test_suite_pk.data b/tests/suites/test_suite_pk.data
index 18e165b..323efc2 100644
--- a/tests/suites/test_suite_pk.data
+++ b/tests/suites/test_suite_pk.data
@@ -348,7 +348,7 @@
 
 PSA wrapped sign: RSA PKCS1 v1.5
 depends_on:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_GENPRIME
-pk_psa_sign:512:PSA_KEY_TYPE_RSA_KEY_PAIR:512
+pk_psa_sign:1024:PSA_KEY_TYPE_RSA_KEY_PAIR:1024
 
 PK Sign ext:RSA2048,PK_RSA,MD_SHA256
 depends_on:MBEDTLS_PKCS1_V15:MBEDTLS_SHA256_C:MBEDTLS_RSA_C
diff --git a/tests/suites/test_suite_pk.function b/tests/suites/test_suite_pk.function
index 7f2b2b8..6c4f9e4 100644
--- a/tests/suites/test_suite_pk.function
+++ b/tests/suites/test_suite_pk.function
@@ -119,7 +119,7 @@
     mbedtls_svc_key_id_t key;
     psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
     const psa_key_type_t type = PSA_KEY_TYPE_RSA_KEY_PAIR;
-    const size_t bits = 256;
+    const size_t bits = 1024;
 
     psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_SIGN_HASH );
     psa_set_key_algorithm( &attributes, PSA_ALG_RSA_PKCS1V15_SIGN_RAW );
@@ -146,7 +146,7 @@
     psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
 
     const char * const name = "Opaque";
-    const size_t bitlen = 256; /* harcoded in genkey() */
+    size_t bitlen;
 
     mbedtls_md_type_t md_alg = MBEDTLS_MD_NONE;
     unsigned char b1[1], b2[1];
@@ -167,9 +167,15 @@
     mbedtls_pk_init( &pk );
 
     if( key_is_rsa )
+    {
+        bitlen = 1024; /* harcoded in genkey() */
         key = pk_psa_genkey_rsa();
+    }
     else
+    {
+        bitlen = 256; /* harcoded in genkey() */
         key = pk_psa_genkey_ecc();
+    }
     if( mbedtls_svc_key_id_is_null( key ) )
         goto exit;