diff --git a/src/libstrongswan/tests/suites/test_ecdsa.c b/src/libstrongswan/tests/suites/test_ecdsa.c
index 058508f18..3d2ed0116 100644
--- a/src/libstrongswan/tests/suites/test_ecdsa.c
+++ b/src/libstrongswan/tests/suites/test_ecdsa.c
@@ -40,7 +40,9 @@ static struct {
  */
 static void test_good_sig(private_key_t *privkey, public_key_t *pubkey)
 {
-	chunk_t sig, data = chunk_from_chars(0x01,0x02,0x03,0xFD,0xFE,0xFF);
+	chunk_t sig, data = chunk_from_chars(0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x00,
+										 0x07,0x06,0x05,0x04,0x03,0x02,0x01,0x00,
+										 0xFC,0xFD,0xFE,0xFF);
 	int i;
 
 	for (i = 0; i < countof(schemes); i++)
@@ -103,7 +105,9 @@ static chunk_t invalid_sigs[] = {
  */
 static void test_bad_sigs(public_key_t *pubkey)
 {
-	chunk_t data = chunk_from_chars(0x01,0x02,0x03,0xFD,0xFE,0xFF);
+	chunk_t data = chunk_from_chars(0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x00,
+									0x07,0x06,0x05,0x04,0x03,0x02,0x01,0x00,
+									0xFC,0xFD,0xFE,0xFF);
 	int s, i;
 
 	for (s = 0; s < countof(schemes); s++)