diff --git a/tests/unittests/tests-credman/Makefile.include b/tests/unittests/tests-credman/Makefile.include
index 58aba54c52..b9851e279d 100644
--- a/tests/unittests/tests-credman/Makefile.include
+++ b/tests/unittests/tests-credman/Makefile.include
@@ -1 +1,2 @@
 USEMODULE += credman
+USEMODULE += credman_load
diff --git a/tests/unittests/tests-credman/tests-credman.c b/tests/unittests/tests-credman/tests-credman.c
index c73180a6b6..6ec8420747 100644
--- a/tests/unittests/tests-credman/tests-credman.c
+++ b/tests/unittests/tests-credman/tests-credman.c
@@ -15,6 +15,86 @@
 
 #define CREDMAN_TEST_TAG (1)
 
+/* $ openssl ecparam -name secp256r1 -genkey -outform der -out key.der */
+static const uint8_t key_pair_der[] = {
+    0x30, 0x77, 0x02, 0x01, 0x01, 0x04, 0x20, 0x04,
+    0x43, 0x81, 0x68, 0xa8, 0x63, 0x9e, 0xf7, 0xe3,
+    0x0d, 0x40, 0x5c, 0xf1, 0xea, 0xc9, 0x90, 0xf6,
+    0x5f, 0x63, 0x86, 0x29, 0xca, 0x20, 0x4f, 0x9f,
+    0x34, 0xb1, 0x9d, 0xa5, 0x17, 0x7b, 0x92, 0xa0,
+    0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d,
+    0x03, 0x01, 0x07, 0xa1, 0x44, 0x03, 0x42, 0x00,
+    0x04, 0x95, 0x38, 0x6c, 0x0e, 0x45, 0xd3, 0x15,
+    0x22, 0xad, 0x29, 0xd5, 0x24, 0xd8, 0x6b, 0x29,
+    0xf7, 0x5c, 0x7b, 0x71, 0x89, 0xac, 0xa2, 0x86,
+    0xb5, 0x9b, 0xdc, 0x00, 0x28, 0xa4, 0xae, 0xd8,
+    0x9f, 0x8b, 0xe8, 0x63, 0xab, 0xd2, 0x30, 0x3c,
+    0x06, 0xcd, 0xec, 0x8a, 0xf7, 0xb9, 0xf8, 0xb4,
+    0x46, 0xca, 0x01, 0x55, 0x03, 0xe1, 0xbe, 0x99,
+    0xf7, 0x13, 0x13, 0x78, 0xbd, 0x40, 0xf9, 0xd4,
+    0x9c
+};
+
+/* $ openssl pkcs8 -topk8 -inform DER -outform DER -in key.der -out key_pkcs8.der -nocrypt */
+static const uint8_t key_pair_pkcs8_der[] = {
+    0x30, 0x81, 0x87, 0x02, 0x01, 0x00, 0x30, 0x13,
+    0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02,
+    0x01, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d,
+    0x03, 0x01, 0x07, 0x04, 0x6d, 0x30, 0x6b, 0x02,
+    0x01, 0x01, 0x04, 0x20, 0x04, 0x43, 0x81, 0x68,
+    0xa8, 0x63, 0x9e, 0xf7, 0xe3, 0x0d, 0x40, 0x5c,
+    0xf1, 0xea, 0xc9, 0x90, 0xf6, 0x5f, 0x63, 0x86,
+    0x29, 0xca, 0x20, 0x4f, 0x9f, 0x34, 0xb1, 0x9d,
+    0xa5, 0x17, 0x7b, 0x92, 0xa1, 0x44, 0x03, 0x42,
+    0x00, 0x04, 0x95, 0x38, 0x6c, 0x0e, 0x45, 0xd3,
+    0x15, 0x22, 0xad, 0x29, 0xd5, 0x24, 0xd8, 0x6b,
+    0x29, 0xf7, 0x5c, 0x7b, 0x71, 0x89, 0xac, 0xa2,
+    0x86, 0xb5, 0x9b, 0xdc, 0x00, 0x28, 0xa4, 0xae,
+    0xd8, 0x9f, 0x8b, 0xe8, 0x63, 0xab, 0xd2, 0x30,
+    0x3c, 0x06, 0xcd, 0xec, 0x8a, 0xf7, 0xb9, 0xf8,
+    0xb4, 0x46, 0xca, 0x01, 0x55, 0x03, 0xe1, 0xbe,
+    0x99, 0xf7, 0x13, 0x13, 0x78, 0xbd, 0x40, 0xf9,
+    0xd4, 0x9c
+};
+
+/* $ openssl ec -in key.der -inform DER -pubout -outform DER -out pub.der */
+static const uint8_t public_key_der[] = {
+    0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86,
+    0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a,
+    0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03,
+    0x42, 0x00, 0x04, 0x95, 0x38, 0x6c, 0x0e, 0x45,
+    0xd3, 0x15, 0x22, 0xad, 0x29, 0xd5, 0x24, 0xd8,
+    0x6b, 0x29, 0xf7, 0x5c, 0x7b, 0x71, 0x89, 0xac,
+    0xa2, 0x86, 0xb5, 0x9b, 0xdc, 0x00, 0x28, 0xa4,
+    0xae, 0xd8, 0x9f, 0x8b, 0xe8, 0x63, 0xab, 0xd2,
+    0x30, 0x3c, 0x06, 0xcd, 0xec, 0x8a, 0xf7, 0xb9,
+    0xf8, 0xb4, 0x46, 0xca, 0x01, 0x55, 0x03, 0xe1,
+    0xbe, 0x99, 0xf7, 0x13, 0x13, 0x78, 0xbd, 0x40,
+    0xf9, 0xd4, 0x9c
+};
+
+/* $ openssl ec -in key.der -inform DER -text */
+static const uint8_t private_key[] = {
+    0x04, 0x43, 0x81, 0x68, 0xa8, 0x63, 0x9e, 0xf7,
+    0xe3, 0x0d, 0x40, 0x5c, 0xf1, 0xea, 0xc9, 0x90,
+    0xf6, 0x5f, 0x63, 0x86, 0x29, 0xca, 0x20, 0x4f,
+    0x9f, 0x34, 0xb1, 0x9d, 0xa5, 0x17, 0x7b, 0x92
+};
+
+static const uint8_t public_key_x[] = {
+    0x95, 0x38, 0x6c, 0x0e, 0x45, 0xd3, 0x15, 0x22,
+    0xad, 0x29, 0xd5, 0x24, 0xd8, 0x6b, 0x29, 0xf7,
+    0x5c, 0x7b, 0x71, 0x89, 0xac, 0xa2, 0x86, 0xb5,
+    0x9b, 0xdc, 0x00, 0x28, 0xa4, 0xae, 0xd8, 0x9f
+};
+
+static const uint8_t public_key_y[] = {
+    0x8b, 0xe8, 0x63, 0xab, 0xd2, 0x30, 0x3c, 0x06,
+    0xcd, 0xec, 0x8a, 0xf7, 0xb9, 0xf8, 0xb4, 0x46,
+    0xca, 0x01, 0x55, 0x03, 0xe1, 0xbe, 0x99, 0xf7,
+    0x13, 0x13, 0x78, 0xbd, 0x40, 0xf9, 0xd4, 0x9c
+};
+
 static int _compare_credentials(const credman_credential_t *a,
                                 const credman_credential_t *b)
 {
@@ -228,6 +308,46 @@ static void test_credman_add_delete_all(void)
     TEST_ASSERT_EQUAL_INT(2, credman_get_used_count());
 }
 
+static void test_credman_load_public_key_from_buffer(void)
+{
+    ecdsa_public_key_t pub;
+
+    int res = credman_load_public_key(public_key_der, sizeof(public_key_der), &pub);
+    TEST_ASSERT_EQUAL_INT(CREDMAN_OK, res);
+    TEST_ASSERT_EQUAL_INT(memcmp(public_key_x, pub.x, sizeof(public_key_x)), 0);
+    TEST_ASSERT_EQUAL_INT(memcmp(public_key_y, pub.y, sizeof(public_key_y)), 0);
+}
+
+static void test_credman_load_private_key_from_buffer(void)
+{
+    credman_credential_t cred;
+
+    int res = credman_load_private_key(key_pair_pkcs8_der, sizeof(key_pair_pkcs8_der), &cred);
+    TEST_ASSERT_EQUAL_INT(CREDMAN_OK, res);
+    TEST_ASSERT_EQUAL_INT(memcmp(private_key, cred.params.ecdsa.private_key, sizeof(private_key)),
+                          0);
+    TEST_ASSERT_EQUAL_INT(memcmp(public_key_x, cred.params.ecdsa.public_key.x,
+                                 sizeof(public_key_x)), 0);
+    TEST_ASSERT_EQUAL_INT(memcmp(public_key_y, cred.params.ecdsa.public_key.y,
+                                 sizeof(public_key_y)), 0);
+    TEST_ASSERT_EQUAL_INT(cred.type, CREDMAN_TYPE_ECDSA);
+}
+
+static void test_credman_load_private_ecc_key_from_buffer(void)
+{
+    credman_credential_t cred;
+
+    int res = credman_load_private_ecc_key(key_pair_der, sizeof(key_pair_der), &cred);
+    TEST_ASSERT_EQUAL_INT(CREDMAN_OK, res);
+    TEST_ASSERT_EQUAL_INT(memcmp(private_key, cred.params.ecdsa.private_key, sizeof(private_key)),
+                          0);
+    TEST_ASSERT_EQUAL_INT(memcmp(public_key_x, cred.params.ecdsa.public_key.x,
+                                 sizeof(public_key_x)), 0);
+    TEST_ASSERT_EQUAL_INT(memcmp(public_key_y, cred.params.ecdsa.public_key.y,
+                                 sizeof(public_key_y)), 0);
+    TEST_ASSERT_EQUAL_INT(cred.type, CREDMAN_TYPE_ECDSA);
+}
+
 Test *tests_credman_tests(void)
 {
     EMB_UNIT_TESTFIXTURES(fixtures) {
@@ -236,6 +356,9 @@ Test *tests_credman_tests(void)
         new_TestFixture(test_credman_delete),
         new_TestFixture(test_credman_delete_random_order),
         new_TestFixture(test_credman_add_delete_all),
+        new_TestFixture(test_credman_load_public_key_from_buffer),
+        new_TestFixture(test_credman_load_private_key_from_buffer),
+        new_TestFixture(test_credman_load_private_ecc_key_from_buffer),
     };
 
     EMB_UNIT_TESTCALLER(credman_tests,