diff --git a/test/test_dbuf.c b/test/test_dbuf.c
index 6214efa..fbeed99 100644
--- a/test/test_dbuf.c
+++ b/test/test_dbuf.c
@@ -44,6 +44,19 @@ START_TEST (test_dbuf)
     fail_if(uc_dbuf_buflen(&buf) != 5);
     fail_if(uc_dbuf_len(&buf) != 5);
 
+    uc_dbuf_take(&buf, 1);
+    rc = uc_dbuf_ensure(&buf, 10);
+    fail_if(rc != 0);
+    ck_assert_str_eq((char *)buf.start, "FGH");
+
+    uc_dbuf_take(&buf, 1);
+    uc_dbuf_trim(&buf);
+    ck_assert_str_eq((char *)buf.start, "GH");
+    fail_if(uc_dbuf_buflen(&buf) != 3);
+    fail_if(uc_dbuf_len(&buf) != 3);
+
+
+
     uc_dbuf_free(&buf);
 END_TEST