diff --git a/src/mme/nas_security.c b/src/mme/nas_security.c
index 297a43cbd5..b34578f635 100644
--- a/src/mme/nas_security.c
+++ b/src/mme/nas_security.c
@@ -171,7 +171,7 @@ status_t nas_security_decode(mme_ue_t *mme_ue, pkbuf_t *pkbuf,
 
             if (memcmp(mac + 2, pkbuf->payload + 2, 2) != 0)
             {
-                d_warn("NAS MAC verification failed");
+                d_error("NAS MAC verification failed");
                 *mac_failed = 1;
             }
 
@@ -218,10 +218,7 @@ status_t nas_security_decode(mme_ue_t *mme_ue, pkbuf_t *pkbuf,
     if (mme_ue->selected_enc_algorithm == 0)
         ciphered = 0;
     if (mme_ue->selected_int_algorithm == 0)
-    {
-        d_error("integrity algorithm is not defined");
         integrity_protected = 0;
-    }
 
     if (ciphered || integrity_protected)
     {
@@ -259,7 +256,7 @@ status_t nas_security_decode(mme_ue_t *mme_ue, pkbuf_t *pkbuf,
                         return CORE_ERROR, "pkbuf_header error");
                 return CORE_ERROR;
 #else
-                d_warn("NAS MAC verification failed");
+                d_error("NAS MAC verification failed");
                 *mac_failed = 1;
 #endif
             }
diff --git a/test/nas_sm_test.c b/test/nas_sm_test.c
index 238e032d5c..0625334696 100644
--- a/test/nas_sm_test.c
+++ b/test/nas_sm_test.c
@@ -654,6 +654,14 @@ static void nas_sm_test3(abts_case *tc, void *data)
     rv = tests1ap_enb_send(sock, sendbuf);
     ABTS_INT_EQUAL(tc, CORE_OK, rv);
 
+    core_sleep(time_from_msec(300));
+
+    /* Send Service Request */
+    rv = tests1ap_build_service_request(&sendbuf, msgindex);
+    ABTS_INT_EQUAL(tc, CORE_OK, rv);
+    rv = tests1ap_enb_send(sock, sendbuf);
+    ABTS_INT_EQUAL(tc, CORE_OK, rv);
+
     /* eNB disonncect from MME */
     rv = tests1ap_enb_close(sock);
     ABTS_INT_EQUAL(tc, CORE_OK, rv);
diff --git a/test/tests1ap.c b/test/tests1ap.c
index 42842d0ac0..7e19a571c8 100644
--- a/test/tests1ap.c
+++ b/test/tests1ap.c
@@ -423,3 +423,31 @@ status_t tests1ap_build_ue_context_release_complete(pkbuf_t **pkbuf, int i)
     return CORE_OK;
 }
 
+status_t tests1ap_build_service_request(pkbuf_t **pkbuf, int i)
+{
+    char *payload[TESTS1AP_MAX_MESSAGE] = { 
+        "",
+        "",
+
+        "000c"
+        "4037000006000800 020004001a000504 c704d4b800430006 0000f1102b670064"
+        "40080000f11054f6 4010008640014000 6000060040000000 03",
+
+    };
+    c_uint16_t len[TESTS1AP_MAX_MESSAGE] = {
+        0,
+        0,
+        59,
+    };
+    char hexbuf[MAX_SDU_LEN];
+    
+    *pkbuf = pkbuf_alloc(0, MAX_SDU_LEN);
+    if (!(*pkbuf)) return CORE_ERROR;
+
+    (*pkbuf)->len = len[i];
+    memcpy((*pkbuf)->payload, CORE_HEX(payload[i], strlen(payload[i]), hexbuf),
+            (*pkbuf)->len);
+
+    return CORE_OK;
+}
+
diff --git a/test/tests1ap.h b/test/tests1ap.h
index d205e6af8c..1330191698 100644
--- a/test/tests1ap.h
+++ b/test/tests1ap.h
@@ -31,6 +31,8 @@ CORE_DECLARE(status_t) tests1ap_build_ue_context_release_request(
         pkbuf_t **pkbuf, int i);
 CORE_DECLARE(status_t) tests1ap_build_ue_context_release_complete(
         pkbuf_t **pkbuf, int i);
+CORE_DECLARE(status_t) tests1ap_build_service_request(
+        pkbuf_t **pkbuf, int i);
 
 #ifdef __cplusplus
 }