diff --git a/kernel_lite/process_posix/src/UidGidTest.cpp b/kernel_lite/process_posix/src/UidGidTest.cpp
index cde44231371673ac2c52011b983bfc303b2a7f5b..00b916d165e620575bb268490c04d95099667d4d 100755
--- a/kernel_lite/process_posix/src/UidGidTest.cpp
+++ b/kernel_lite/process_posix/src/UidGidTest.cpp
@@ -640,11 +640,15 @@ HWTEST_F(UidGidTest, testGetgroups, Function | MediumTest | Level1)
     const int testSize = 10;
     gid_t gidList[testSize] = {0};
     int n = getgroups(0, gidList);
-    ASSERT_EQ(n, 1);
-    ASSERT_EQ(gidList[0], 0);
+    ASSERT_EQ(n, 2);
+    int rt = getgroups(n, gidList);
+    ASSERT_EQ(gidList[0], SHELL_GID);
+    ASSERT_EQ(gidList[1], 0);
+    ASSERT_EQ(rt, n);
     n = getgroups(testSize, gidList);
-    ASSERT_EQ(n, 1);
+    ASSERT_EQ(n, 2);
     ASSERT_EQ(gidList[0], SHELL_GID);
+    ASSERT_EQ(gidList[1], 0);
 }
 
 /**
@@ -705,12 +709,15 @@ HWTEST_F(UidGidTest, testSetgroups2, Function | MediumTest | Level1)
     gid_t gidListOut[4] = {0};
 
     LOG("Init: make sure groups not changed by other test.");
-    int n = getgroups(1, gidListOut);
-    EXPECT_EQ(n, 1);
+    int n = getgroups(0, gidListOut);
+    EXPECT_EQ(n, 2);
+    int rt = getgroups(n, gidListOut);
     EXPECT_EQ(gidListOut[0], SHELL_GID);
+    EXPECT_EQ(gidListOut[1], 0);
+    EXPECT_EQ(rt, n);
 
     LOG("add 2 groups");
-    int rt = setgroups(2, gidListIn);
+    rt = setgroups(2, gidListIn);
     EXPECT_EQ(rt, 0);
     n = getgroups(4, gidListOut);
     EXPECT_EQ(n, 3);
@@ -721,8 +728,10 @@ HWTEST_F(UidGidTest, testSetgroups2, Function | MediumTest | Level1)
     LOG("clear groups");
     rt = setgroups(0, NULL);
     EXPECT_EQ(rt, 0);
-    n = getgroups(2, gidListOut);
+    n = getgroups(0, gidListOut);
     EXPECT_EQ(n, 1);
+    rt = getgroups(n, gidListOut);
+    EXPECT_EQ(rt, n);
     EXPECT_EQ(gidListOut[0], SHELL_GID);
 }
 
diff --git a/kernel_lite/process_posix/src/UidGidTest.h b/kernel_lite/process_posix/src/UidGidTest.h
index fc3a1131322bc4814e583a39ee7dc4952f294c32..57f9d9a18e40d5ecd3f47fa944f89082594383ae 100755
--- a/kernel_lite/process_posix/src/UidGidTest.h
+++ b/kernel_lite/process_posix/src/UidGidTest.h
@@ -23,6 +23,9 @@
 
 // max test number of uid/gid, not actual max number
 const int MAX_UGID = 100000;
+static int groupNum = -1;
+const int ARRAY_SIZE = 10;
+static gid_t groupsArray[ARRAY_SIZE] = {0};
 
 // Assert all uid == expectUid
 #define AssertAllUid(expectUid)  do {  \
@@ -54,14 +57,30 @@ public:
         return  id;
     }
 protected:
+    static void SetUpTestCase()
+    {
+        for (int i = 0; i < ARRAY_SIZE; i++) {
+            groupsArray[i] = -1;
+        }
+        groupNum = getgroups(0, groupsArray);
+        EXPECT_NE(groupNum, -1);
+        int rt = getgroups(groupNum, groupsArray);
+        EXPECT_EQ(rt, groupNum);
+    }
     void TearDown()
     {
         LOG("TearDown: reset uid and gid");
+        gid_t groupIds[groupNum];
+        LOG("TearDown: reset uid and gid %d", sizeof(groupIds) / sizeof(gid_t));
+        for (int i = 0; i < groupNum; i++) {
+            groupIds[i] = groupsArray[i];
+        }
         setuid(SHELL_UID);
         setgid(SHELL_GID);
         AssertAllUid(SHELL_UID);
         AssertAllGid(SHELL_GID);
-        int  rt = setgroups(0, NULL);
+        int rt = setgroups(groupNum, groupIds);
+        EXPECT_EQ(rt, 0);
     }
 };