diff --git a/examples/unittest/test3.py b/examples/unittest/test3.py
new file mode 100644
index 000000000..06d8f5503
--- /dev/null
+++ b/examples/unittest/test3.py
@@ -0,0 +1,37 @@
+import socket
+import random
+import unittest
+
+
+class TestUnittestAssertions(unittest.TestCase):
+    def testSocket(self):
+        server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        host = "127.0.0.1"
+        port = 9999 + random.randint(0, 1000) + 1
+        print("port:", port)
+        server.bind((host, port))
+        server.listen(5)
+        
+        client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        client.connect((host, port))
+        
+        accept, addr = server.accept()
+        self.assertEqual(addr, "127.0.0.1")
+        
+        print("recv from client: %s" % str(addr))
+        
+        client.send("send test from client".encode())
+        print("server recv:", accept.recv(1024).decode())
+        
+        accept.send("send test from server".encode())
+        print("client recv:", client.recv(1024).decode())
+        
+        accept.close()
+        client.close()
+        server.close()
+
+
+suit = unittest.TestSuite("test1")
+suit.addTest(TestUnittestAssertions())
+runner = unittest.TextTestRunner()
+res = runner.run(suit)
diff --git a/package/unittest/unittest.py b/package/unittest/unittest.py
index 7e55e6e2f..48a0f20e1 100644
--- a/package/unittest/unittest.py
+++ b/package/unittest/unittest.py
@@ -1,3 +1,6 @@
+import PikaStdLib
+mem = PikaStdLib.MemChecker()
+
 class TestResult:
     def __init__(self):
         self.errorsNum = 0
@@ -70,8 +73,14 @@ class TestCase:
                 self.test_fn = getattr(self, name)
                 print("[ RUN      ] %s.%s" % (suite_name, name))
                 try:
+                    mem_before = 0.0
+                    mem_after = 0.0
+                    mem_before = mem.getNow()
                     self.test_fn()
+                    mem_after = mem.getNow()
                     print("[       OK ] %s.%s" % (suite_name, name))
+                    if mem_after != mem_before:
+                        print("[ MEM LACK ]", mem_after - mem_before)
                 except:
                     print("[  FAILED  ] %s.%s" % (suite_name, name))
                     result.errorsNum += 1
diff --git a/port/linux/package/pikascript/unittest.py b/port/linux/package/pikascript/unittest.py
index 7e55e6e2f..48a0f20e1 100644
--- a/port/linux/package/pikascript/unittest.py
+++ b/port/linux/package/pikascript/unittest.py
@@ -1,3 +1,6 @@
+import PikaStdLib
+mem = PikaStdLib.MemChecker()
+
 class TestResult:
     def __init__(self):
         self.errorsNum = 0
@@ -70,8 +73,14 @@ class TestCase:
                 self.test_fn = getattr(self, name)
                 print("[ RUN      ] %s.%s" % (suite_name, name))
                 try:
+                    mem_before = 0.0
+                    mem_after = 0.0
+                    mem_before = mem.getNow()
                     self.test_fn()
+                    mem_after = mem.getNow()
                     print("[       OK ] %s.%s" % (suite_name, name))
+                    if mem_after != mem_before:
+                        print("[ MEM LACK ]", mem_after - mem_before)
                 except:
                     print("[  FAILED  ] %s.%s" % (suite_name, name))
                     result.errorsNum += 1