diff --git a/tests/oss-fuzz/pdu_parse_target.c b/tests/oss-fuzz/pdu_parse_target.c
index 04be491a..f1cea993 100644
--- a/tests/oss-fuzz/pdu_parse_target.c
+++ b/tests/oss-fuzz/pdu_parse_target.c
@@ -8,14 +8,15 @@ LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     coap_pdu_t *pdu = coap_pdu_init(0, 0, 0, size);
     if (pdu) {
         coap_set_log_level(LOG_DEBUG);
-        coap_pdu_parse(COAP_PROTO_UDP, data, size, pdu);
-        coap_string_t *query = coap_get_query(pdu);
-        coap_string_t *uri_path = coap_get_uri_path(pdu);
-        coap_show_pdu(LOG_DEBUG, pdu);
-        coap_pdu_encode_header(pdu, COAP_PROTO_UDP);
+        if (coap_pdu_parse(COAP_PROTO_UDP, data, size, pdu)) {
+            coap_string_t *query = coap_get_query(pdu);
+            coap_string_t *uri_path = coap_get_uri_path(pdu);
+            coap_show_pdu(LOG_DEBUG, pdu);
+            coap_pdu_encode_header(pdu, COAP_PROTO_UDP);
 
-        coap_delete_string(query);
-        coap_delete_string(uri_path);
+            coap_delete_string(query);
+            coap_delete_string(uri_path);
+        }
         coap_delete_pdu(pdu);
     }
     return 0;