diff --git a/tests/suites/test_suite_pkparse.data b/tests/suites/test_suite_pkparse.data
index 5ffb58036..017eb2e8d 100644
--- a/tests/suites/test_suite_pkparse.data
+++ b/tests/suites/test_suite_pkparse.data
@@ -1063,32 +1063,32 @@ depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256K1_ENABLED:MB
 pk_parse_keyfile_ec:"data_files/ec_prv.specdom.der":"NULL":0
 
 Key ASN1 (Incorrect first tag)
-pk_parse_key:"":"":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
+pk_parse_key:"":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
 
 Key ASN1 (RSAPrivateKey, incorrect version tag)
 depends_on:MBEDTLS_RSA_C
-pk_parse_key:"300100":"":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
+pk_parse_key:"300100":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
 
 Key ASN1 (RSAPrivateKey, version tag missing)
 depends_on:MBEDTLS_RSA_C
-pk_parse_key:"3000":"":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
+pk_parse_key:"3000":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
 
 Key ASN1 (RSAPrivateKey, invalid version)
 depends_on:MBEDTLS_RSA_C
-pk_parse_key:"3003020101":"":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
+pk_parse_key:"3003020101":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
 
 Key ASN1 (RSAPrivateKey, correct version, incorrect tag)
 depends_on:MBEDTLS_RSA_C
-pk_parse_key:"300402010000":"":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
+pk_parse_key:"300402010000":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
 
 Key ASN1 (RSAPrivateKey, values present, length mismatch)
 depends_on:MBEDTLS_RSA_C
-pk_parse_key:"301c02010002010102010102010102010102010102010102010102010100":"":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
+pk_parse_key:"301c02010002010102010102010102010102010102010102010102010100":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
 
 Key ASN1 (RSAPrivateKey, values present, check_privkey fails)
 depends_on:MBEDTLS_RSA_C
-pk_parse_key:"301b020100020102020101020101020101020101020101020101020101":"":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
+pk_parse_key:"301b020100020102020101020101020101020101020101020101020101":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
 
 Key ASN1 (ECPrivateKey, empty parameters)
 depends_on:MBEDTLS_ECP_C
-pk_parse_key:"30070201010400a000":"":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
+pk_parse_key:"30070201010400a000":MBEDTLS_ERR_PK_KEY_INVALID_FORMAT
diff --git a/tests/suites/test_suite_pkparse.function b/tests/suites/test_suite_pkparse.function
index 94d25e7eb..bbbd6799e 100644
--- a/tests/suites/test_suite_pkparse.function
+++ b/tests/suites/test_suite_pkparse.function
@@ -114,26 +114,18 @@ exit:
 /* END_CASE */
 
 /* BEGIN_CASE */
-void pk_parse_key( char *key_data, char *result_str, int result )
+void pk_parse_key( char *key_data, int result )
 {
     mbedtls_pk_context pk;
-    unsigned char buf[2000];
-    unsigned char output[2000];
+    unsigned char buf[128];
     int data_len;
-    ((void) result_str);
 
     mbedtls_pk_init( &pk );
 
-    memset( buf, 0, 2000 );
-    memset( output, 0, 2000 );
-
+    memset( buf, 0, sizeof( buf ) );
     data_len = unhexify( buf, key_data );
 
-    TEST_ASSERT( mbedtls_pk_parse_key( &pk, buf, data_len, NULL, 0 ) == ( result ) );
-    if( ( result ) == 0 )
-    {
-        TEST_ASSERT( 1 );
-    }
+    TEST_ASSERT( mbedtls_pk_parse_key( &pk, buf, data_len, NULL, 0 ) == result );
 
 exit:
     mbedtls_pk_free( &pk );