diff --git a/tests/util/guac_unicode.c b/tests/util/guac_unicode.c
index 2d2d7891..162813e9 100644
--- a/tests/util/guac_unicode.c
+++ b/tests/util/guac_unicode.c
@@ -42,6 +42,9 @@
 
 void test_guac_unicode() {
 
+    int codepoint;
+    char buffer[16];
+
     /* Test character length */
     CU_ASSERT_EQUAL(1, guac_utf8_charsize(UTF8_1b[0]));
     CU_ASSERT_EQUAL(2, guac_utf8_charsize(UTF8_2b[0]));
@@ -60,8 +63,35 @@ void test_guac_unicode() {
     CU_ASSERT_EQUAL(5, guac_utf8_strlen("hello"));
     CU_ASSERT_EQUAL(9, guac_utf8_strlen("guacamole"));
 
-    /*int guac_utf8_write(int codepoint, char* utf8, int length);
-    int guac_utf8_read(const char* utf8, int length, int* codepoint);*/
+    /* Test writes */
+    CU_ASSERT_EQUAL(1, guac_utf8_write(0x00065, &(buffer[0]),  10));
+    CU_ASSERT_EQUAL(2, guac_utf8_write(0x00654, &(buffer[1]),   9));
+    CU_ASSERT_EQUAL(3, guac_utf8_write(0x00876, &(buffer[3]),   7));
+    CU_ASSERT_EQUAL(4, guac_utf8_write(0x12345, &(buffer[6]),   4));
+    CU_ASSERT_EQUAL(0, guac_utf8_write(0x00066, &(buffer[10]),  0));
+
+    /* Test result of write */
+    CU_ASSERT(memcmp("\x65",             &(buffer[0]), 1) == 0); /* U+0065  */
+    CU_ASSERT(memcmp("\xD9\x94",         &(buffer[1]), 2) == 0); /* U+0654  */
+    CU_ASSERT(memcmp("\xE0\xA1\xB6",     &(buffer[3]), 3) == 0); /* U+0876  */
+    CU_ASSERT(memcmp("\xF0\x92\x8D\x85", &(buffer[6]), 4) == 0); /* U+12345 */
+
+    /* Test reads */
+
+    CU_ASSERT_EQUAL(1, guac_utf8_read(&(buffer[0]), 10, &codepoint));
+    CU_ASSERT_EQUAL(0x0065, codepoint);
+
+    CU_ASSERT_EQUAL(2, guac_utf8_read(&(buffer[1]),  9, &codepoint));
+    CU_ASSERT_EQUAL(0x0654, codepoint);
+
+    CU_ASSERT_EQUAL(3, guac_utf8_read(&(buffer[3]),  7, &codepoint));
+    CU_ASSERT_EQUAL(0x0876, codepoint);
+
+    CU_ASSERT_EQUAL(4, guac_utf8_read(&(buffer[6]),  4, &codepoint));
+    CU_ASSERT_EQUAL(0x12345, codepoint);
+
+    CU_ASSERT_EQUAL(0, guac_utf8_read(&(buffer[10]), 0, &codepoint));
+    CU_ASSERT_EQUAL(0x12345, codepoint);
 
 }