diff --git a/tests/kernel/common/src/byteorder.c b/tests/kernel/common/src/byteorder.c
index 35373bf1753..55f57293e0a 100644
--- a/tests/kernel/common/src/byteorder.c
+++ b/tests/kernel/common/src/byteorder.c
@@ -262,6 +262,45 @@ void test_sys_put_le32(void)
 	zassert_mem_equal(tmp, buf, sizeof(u32_t), "sys_put_le32() failed");
 }
 
+/**
+ * @brief Test sys_get_le64() functionality
+ *
+ * @details Test if sys_get_le64() correctly handles endianness.
+ *
+ * @see sys_get_le64()
+ */
+void test_sys_get_le64(void)
+{
+	u64_t val = 0xf0e1d2c3b4a59687, tmp;
+	u8_t buf[] = {
+		0x87, 0x96, 0xa5, 0xb4, 0xc3, 0xd2, 0xe1, 0xf0
+	};
+
+	tmp = sys_get_le64(buf);
+
+	zassert_equal(tmp, val, "sys_get_le64() failed");
+}
+
+/**
+ * @brief Test sys_put_le64() functionality
+ *
+ * @details Test if sys_put_le64() correctly handles endianness.
+ *
+ * @see sys_put_le64()
+ */
+void test_sys_put_le64(void)
+{
+	u64_t val = 0xf0e1d2c3b4a59687;
+	u8_t buf[] = {
+		0x87, 0x96, 0xa5, 0xb4, 0xc3, 0xd2, 0xe1, 0xf0
+	};
+	u8_t tmp[sizeof(u64_t)];
+
+	sys_put_le64(val, tmp);
+
+	zassert_mem_equal(tmp, buf, sizeof(u64_t), "sys_put_le64() failed");
+}
+
 /**
  * @}
  */
diff --git a/tests/kernel/common/src/main.c b/tests/kernel/common/src/main.c
index c374dc90dee..bd2b0731f81 100644
--- a/tests/kernel/common/src/main.c
+++ b/tests/kernel/common/src/main.c
@@ -22,6 +22,8 @@ extern void test_sys_get_le16(void);
 extern void test_sys_put_le16(void);
 extern void test_sys_get_le32(void);
 extern void test_sys_put_le32(void);
+extern void test_sys_get_le64(void);
+extern void test_sys_put_le64(void);
 extern void test_atomic(void);
 extern void test_intmath(void);
 extern void test_printk(void);
@@ -115,6 +117,8 @@ void test_main(void)
 			 ztest_unit_test(test_sys_put_le16),
 			 ztest_unit_test(test_sys_get_le32),
 			 ztest_unit_test(test_sys_put_le32),
+			 ztest_unit_test(test_sys_get_le64),
+			 ztest_unit_test(test_sys_put_le64),
 			 ztest_user_unit_test(test_atomic),
 			 ztest_unit_test(test_bitfield),
 			 ztest_unit_test(test_printk),