diff --git a/tests/suites/test_suite_ecp.function b/tests/suites/test_suite_ecp.function
index a697e72ecc..f2b6376141 100644
--- a/tests/suites/test_suite_ecp.function
+++ b/tests/suites/test_suite_ecp.function
@@ -65,6 +65,8 @@ void mbedtls_ecp_curve_info( int id, int tls_id, int size, char * name )
     TEST_ASSERT( by_id == by_name );
 
     TEST_ASSERT( by_id->bit_size == size );
+    TEST_ASSERT( size <= MBEDTLS_ECP_MAX_BITS );
+    TEST_ASSERT( size <= MBEDTLS_ECP_MAX_BYTES * 8 );
 }
 /* END_CASE */
 
@@ -473,6 +475,7 @@ void ecp_muladd( int id,
     TEST_EQUAL( 0, mbedtls_ecp_point_write_binary(
                     &grp, &R, MBEDTLS_ECP_PF_UNCOMPRESSED,
                     &len, actual_result, sizeof( actual_result ) ) );
+    TEST_ASSERT( len <= MBEDTLS_ECP_MAX_PT_LEN );
 
     ASSERT_COMPARE( expected_result->x, expected_result->len,
                     actual_result, len );
@@ -544,6 +547,7 @@ void ecp_write_binary( int id, char * x, char * y, char * z, int format,
 
     if( ret == 0 )
     {
+        TEST_ASSERT( olen <= MBEDTLS_ECP_MAX_PT_LEN );
         TEST_ASSERT( mbedtls_test_hexcmp( buf, out->x, olen, out->len ) == 0 );
     }