diff --git a/tests/testcase/integration/memory1.c b/tests/testcase/integration/memory1.c
index e2423bb..2ac49ee 100644
--- a/tests/testcase/integration/memory1.c
+++ b/tests/testcase/integration/memory1.c
@@ -8,5 +8,6 @@ int main()
     int *a = NULL;
     a = (int *)malloc(size);
     memset(a, 1, size);
+    free(a);
     return 0;
 }
\ No newline at end of file
diff --git a/tests/testcase/integration/memory2.c b/tests/testcase/integration/memory2.c
index 826cc37..0d5d9b4 100644
--- a/tests/testcase/integration/memory2.c
+++ b/tests/testcase/integration/memory2.c
@@ -12,6 +12,7 @@ int main()
     }
     else {
         memset(a, 1, size);
+        free(a);
         return 0;
     }
 }
\ No newline at end of file
diff --git a/tests/testcase/integration/memory3.c b/tests/testcase/integration/memory3.c
new file mode 100644
index 0000000..83f838c
--- /dev/null
+++ b/tests/testcase/integration/memory3.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int arr[102400000];
+
+
+int main()
+{
+    memset(arr, 1, sizeof(arr));
+    return 0;
+}
\ No newline at end of file
diff --git a/tests/testcase/integration/test.py b/tests/testcase/integration/test.py
index ab8508b..244385c 100644
--- a/tests/testcase/integration/test.py
+++ b/tests/testcase/integration/test.py
@@ -169,7 +169,7 @@ class IntegrationTest(base.BaseTestCase):
         self.assertEqual(result["signal"], signal.SIGKILL)
         self.assertTrue(result["cpu_time"] >= config["max_cpu_time"])
 
-    def test_memory(self):
+    def test_memory1(self):
         config = self.config
         config["max_memory"] = 64 * 1024 * 1024
         config["exe_path"] = self._compile("memory1.c")
@@ -189,6 +189,14 @@ class IntegrationTest(base.BaseTestCase):
         self.assertTrue(result["memory"] < 12 * 1024 * 1024)
         self.assertEqual(result["result"], _judger.RUNTIME_ERROR)
 
+    def test_memory3(self):
+        config = self.config
+        config["max_memory"] = 512 * 1024 * 1024
+        config["exe_path"] = self._compile("memory3.c")
+        result = _judger.run(**config)
+        self.assertEqual(result["result"], _judger.SUCCESS)
+        self.assertTrue(result["memory"] >= 102400000 * 4)
+
     def test_re1(self):
         config = self.config
         config["exe_path"] = self._compile("re1.c")
@@ -236,7 +244,6 @@ class IntegrationTest(base.BaseTestCase):
         config["uid"] = 65534
         config["gid"] = 65534
         result = _judger.run(**config)
-        print result
         self.assertEqual(result["result"], _judger.SUCCESS)
         output = "uid=65534(nobody) gid=65534(nogroup) groups=65534(nogroup)\nuid 65534\ngid 65534\n"
         self.assertEqual(output, self.output_content(config["output_path"]))