diff --git a/tests/unittests/tests-pkt/tests-pkt.c b/tests/unittests/tests-pkt/tests-pkt.c
index 0d192993b4..ff7621841c 100644
--- a/tests/unittests/tests-pkt/tests-pkt.c
+++ b/tests/unittests/tests-pkt/tests-pkt.c
@@ -35,6 +35,38 @@
 #define _INIT_ELEM_STATIC_TYPE(_type, _next) \
     { .users = 1, .next = (_next), .data = NULL, .size = 0, .type = (_type) }
 
+static void test_pkt_prev_snip__NULL_NULL(void)
+{
+    TEST_ASSERT_NULL(gnrc_pkt_prev_snip(NULL, NULL));
+}
+
+static void test_pkt_prev_snip__pkt_NULL(void)
+{
+    gnrc_pktsnip_t pkt = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t *res;
+
+    res = gnrc_pkt_prev_snip(&pkt, NULL);
+    TEST_ASSERT((&pkt) == res);
+}
+
+static void test_pkt_prev_snip__NULL_snip(void)
+{
+    gnrc_pktsnip_t snip = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+
+    TEST_ASSERT_NULL(gnrc_pkt_prev_snip(NULL, &snip));
+}
+
+static void test_pkt_prev_snip__pkt_snip(void)
+{
+    gnrc_pktsnip_t snip1 = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t snip2 = _INIT_ELEM(SIZE_MAX, NULL, &snip1);
+    gnrc_pktsnip_t pkt = _INIT_ELEM(SIZE_MAX, NULL, &snip2);
+    gnrc_pktsnip_t *res;
+
+    res = gnrc_pkt_prev_snip(&pkt, &snip1);
+    TEST_ASSERT((&snip2) == res);
+}
+
 static void test_pkt_len__NULL(void)
 {
     TEST_ASSERT_EQUAL_INT(0, gnrc_pkt_len(NULL));
@@ -93,6 +125,80 @@ static void test_pkt_len__3_elem(void)
     TEST_ASSERT_EQUAL_INT(sizeof(TEST_STRING8), gnrc_pkt_len(&snip1));
 }
 
+static void test_pkt_append(void)
+{
+    gnrc_pktsnip_t snip1 = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t snip2 = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t pkt = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t *res = &pkt;
+
+    res = gnrc_pkt_append(res, &snip1);
+    TEST_ASSERT((&pkt) == res);
+    TEST_ASSERT((&snip1) == res->next);
+    TEST_ASSERT_NULL(res->next->next);
+    res = gnrc_pkt_append(res, &snip2);
+    TEST_ASSERT((&pkt) == res);
+    TEST_ASSERT((&snip1) == res->next);
+    TEST_ASSERT((&snip2) == res->next->next);
+}
+
+static void test_pkt_prepend(void)
+{
+    gnrc_pktsnip_t snip1 = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t snip2 = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t pkt = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t *res = &pkt;
+
+    res = gnrc_pkt_prepend(res, &snip1);
+    TEST_ASSERT((&snip1) == res);
+    TEST_ASSERT((&pkt) == res->next);
+    TEST_ASSERT_NULL(res->next->next);
+    res = gnrc_pkt_prepend(res, &snip2);
+    TEST_ASSERT((&snip2) == res);
+    TEST_ASSERT((&snip1) == res->next);
+    TEST_ASSERT((&pkt) == res->next->next);
+}
+
+static void test_pkt_delete__NULL(void)
+{
+    gnrc_pktsnip_t snip1 = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t snip2 = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t pkt = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t *res = &pkt;
+
+    res = gnrc_pkt_prepend(res, &snip1);
+    res = gnrc_pkt_prepend(res, &snip2);
+    TEST_ASSERT((&snip2) == res);
+    TEST_ASSERT((&snip1) == res->next);
+    TEST_ASSERT((&pkt) == res->next->next);
+    res = gnrc_pkt_delete(res, NULL);
+    /* pkt did not change */
+    TEST_ASSERT((&snip2) == res);
+    TEST_ASSERT((&snip1) == res->next);
+    TEST_ASSERT((&pkt) == res->next->next);
+}
+
+static void test_pkt_delete(void)
+{
+    gnrc_pktsnip_t snip1 = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t snip2 = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t pkt = _INIT_ELEM(SIZE_MAX, NULL, NULL);
+    gnrc_pktsnip_t *res = &pkt;
+
+    res = gnrc_pkt_prepend(res, &snip1);
+    res = gnrc_pkt_prepend(res, &snip2);
+    TEST_ASSERT((&snip2) == res);
+    TEST_ASSERT((&snip1) == res->next);
+    TEST_ASSERT((&pkt) == res->next->next);
+    res = gnrc_pkt_delete(res, &snip1);
+    TEST_ASSERT((&snip2) == res);
+    TEST_ASSERT((&pkt) == res->next);
+    res = gnrc_pkt_delete(res, &snip2);
+    TEST_ASSERT((&pkt) == res);
+    res = gnrc_pkt_delete(res, &pkt);
+    TEST_ASSERT_NULL(res);
+}
+
 static void test_pkt_len_upto__NULL(void)
 {
     TEST_ASSERT_EQUAL_INT(0, gnrc_pkt_len_upto(NULL, GNRC_NETTYPE_TEST));
@@ -198,6 +304,10 @@ static void test_pkt_equals_iolist(void)
 Test *tests_pkt_tests(void)
 {
     EMB_UNIT_TESTFIXTURES(fixtures) {
+        new_TestFixture(test_pkt_prev_snip__NULL_NULL),
+        new_TestFixture(test_pkt_prev_snip__pkt_NULL),
+        new_TestFixture(test_pkt_prev_snip__NULL_snip),
+        new_TestFixture(test_pkt_prev_snip__pkt_snip),
         new_TestFixture(test_pkt_len__NULL),
         new_TestFixture(test_pkt_len__1_elem__size_MAX),
         new_TestFixture(test_pkt_len__1_elem__size_0),
@@ -205,6 +315,10 @@ Test *tests_pkt_tests(void)
         new_TestFixture(test_pkt_len__2_elem),
         new_TestFixture(test_pkt_len__2_elem__overflow),
         new_TestFixture(test_pkt_len__3_elem),
+        new_TestFixture(test_pkt_append),
+        new_TestFixture(test_pkt_prepend),
+        new_TestFixture(test_pkt_delete__NULL),
+        new_TestFixture(test_pkt_delete),
         new_TestFixture(test_pkt_len_upto__NULL),
         new_TestFixture(test_pkt_len_upto__not_in_list),
         new_TestFixture(test_pkt_len_upto__in_list),