diff --git a/tests/test_cbuffer.c b/tests/test_cbuffer.c
index 476a406..8a8f071 100644
--- a/tests/test_cbuffer.c
+++ b/tests/test_cbuffer.c
@@ -61,7 +61,7 @@ void TestCbuffer_offer_and_poll(CuTest * tc)
 {
     void *cb = cbuf_new(16);
     cbuf_offer(cb, (unsigned char*)"abcd", 4);
-//    CuAssertTrue(tc, 96 == cbuf_get_unused_size(cb));
+    CuAssertTrue(tc, 65532 == cbuf_unusedspace(cb));
     CuAssertTrue(tc, 0 == strncmp("abcd", (char*)cbuf_poll(cb, 4), 4));
 }