diff --git a/tests/suites/test_suite_ecp.function b/tests/suites/test_suite_ecp.function
index d014e8a..ec31c11 100644
--- a/tests/suites/test_suite_ecp.function
+++ b/tests/suites/test_suite_ecp.function
@@ -1090,7 +1090,7 @@
         {
             unsigned char buf[MBEDTLS_ECP_MAX_BYTES];
 
-            ret = mbedtls_ecp_write_key( grp_id, &key, buf, in_key->len );
+            ret = mbedtls_ecp_write_key( &key, buf, in_key->len );
             TEST_ASSERT( ret == 0 );
 
             ASSERT_COMPARE( in_key->x, in_key->len,
@@ -1101,13 +1101,13 @@
             unsigned char export1[MBEDTLS_ECP_MAX_BYTES];
             unsigned char export2[MBEDTLS_ECP_MAX_BYTES];
 
-            ret = mbedtls_ecp_write_key( grp_id, &key, export1, in_key->len );
+            ret = mbedtls_ecp_write_key( &key, export1, in_key->len );
             TEST_ASSERT( ret == 0 );
 
             ret = mbedtls_ecp_read_key( grp_id, &key2, export1, in_key->len );
             TEST_ASSERT( ret == expected );
 
-            ret = mbedtls_ecp_write_key( grp_id, &key2, export2, in_key->len );
+            ret = mbedtls_ecp_write_key( &key2, export2, in_key->len );
             TEST_ASSERT( ret == 0 );
 
             ASSERT_COMPARE( export1, in_key->len,