diff --git a/tests/test_compat.py b/tests/test_compat.py
index 7203f12..54f46cc 100644
--- a/tests/test_compat.py
+++ b/tests/test_compat.py
@@ -1,6 +1,7 @@
 from pydu.compat import (PY2, iterkeys, itervalues, iteritems,
                          text_type, string_types, numeric_types,
-                         is_iterable, has_next_attr)
+                         is_iterable, has_next_attr, urljoin,
+                         imap)
 
 
 def test_itersth():
@@ -47,8 +48,21 @@ def test_types():
 
 
 def test_urljoin():
-    from pydu.compat import urljoin
+    assert 'http://uyun.cn/test' == urljoin('http://uyun.cn', 'test')
 
 
 def test_imap():
-    from pydu.compat import imap
+    assert list(imap(pow, (2, 3, 10), (5, 2, 3))) == [32, 9, 1000]
+    assert list(imap(max, (1, 4, 7), (2, 3, 8))) == [2, 4, 8]
+
+
+# TODO: add test case
+def test_ulib():
+    from pydu.compat import ulib
+    pass
+
+
+# TODO: add test case
+def test_urlparse():
+    from pydu.compat import urlparse
+    pass
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