diff --git a/CMakeLists.txt b/CMakeLists.txt
index f6f8349..6e644a8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -169,4 +169,5 @@ endif()
 if (CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME AND BUILD_TESTING)
     add_subdirectory(example)
     add_subdirectory(test)
+    add_subdirectory(test2)
 endif()
diff --git a/test2/CMakeLists.txt b/test2/CMakeLists.txt
new file mode 100644
index 0000000..bbdfcb4
--- /dev/null
+++ b/test2/CMakeLists.txt
@@ -0,0 +1,19 @@
+add_executable(cutest_test
+    tools/__init__.c
+    tools/help.c
+    main.c
+    test.c
+)
+target_include_directories(cutest_test
+    PUBLIC
+        $<INSTALL_INTERFACE:include>
+    PRIVATE
+        ${CMAKE_CURRENT_SOURCE_DIR}
+)
+target_link_libraries(cutest_test
+    PRIVATE
+        cutest
+)
+cutest_setup_target_wall(cutest_test)
+
+add_test(NAME cutest_test COMMAND $<TARGET_FILE:cutest_test>)
diff --git a/test2/main.c b/test2/main.c
new file mode 100644
index 0000000..776f22d
--- /dev/null
+++ b/test2/main.c
@@ -0,0 +1,6 @@
+#include "test.h"
+
+int main(int argc, char* argv[])
+{
+    return cutest_run_tests(argc, argv, stdout, &test_hook);
+}
diff --git a/test2/test.c b/test2/test.c
new file mode 100644
index 0000000..dd5d8dd
--- /dev/null
+++ b/test2/test.c
@@ -0,0 +1,38 @@
+#include <stdlib.h>
+#include <string.h>
+#include "tools/__init__.h"
+#include "test.h"
+
+static const char* s_tool_help =
+"missing argument after `--`, use `-- help` (pay attention to the space) to see\n"
+"what tools builtin.\n"
+;
+
+static void _before_all_test(int argc, char* argv[])
+{
+    int i;
+    for (i = 0; i < argc; i++)
+    {
+        if (strcmp(argv[i], "--") == 0)
+        {
+            if (i == argc - 1)
+            {
+                fprintf(stderr, "%s", s_tool_help);
+                exit(EXIT_FAILURE);
+            }
+
+            exit(test_tool_exec(argc - i - 1, argv + i + 1));
+        }
+    }
+}
+
+const cutest_hook_t test_hook = {
+    _before_all_test,   /* .before_all_test */
+    NULL,               /* .after_all_test */
+    NULL,               /* .before_setup */
+    NULL,               /* .after_setup */
+    NULL,               /* .before_teardown */
+    NULL,               /* .after_teardown */
+    NULL,               /* .before_test */
+    NULL,               /* .after_test */
+};
diff --git a/test2/test.h b/test2/test.h
new file mode 100644
index 0000000..a4cc4b3
--- /dev/null
+++ b/test2/test.h
@@ -0,0 +1,18 @@
+#ifndef __CUTEST_TEST_H__
+#define __CUTEST_TEST_H__
+
+#include "cutest.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Global test hook.
+ */
+extern const cutest_hook_t test_hook;
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/test2/tools/__init__.c b/test2/tools/__init__.c
new file mode 100644
index 0000000..51cddd4
--- /dev/null
+++ b/test2/tools/__init__.c
@@ -0,0 +1,41 @@
+#include <string.h>
+#include <stdlib.h>
+#include "__init__.h"
+#include "test.h"
+
+extern const test_tool_t test_tool_help;
+
+static const test_tool_t* const g_command_table[] = {
+    &test_tool_help,
+};
+
+int test_tool_exec(int argc, char* argv[])
+{
+    size_t i;
+    for (i = 0; i < TEST_ARRAY_SIZE(g_command_table); i++)
+    {
+        if (strcmp(argv[0], g_command_table[i]->cmd) != 0)
+        {
+            continue;
+        }
+
+        return g_command_table[i]->proc(argc, argv);
+    }
+
+    fprintf(stderr, "%s: command not found\n", argv[0]);
+    fflush(NULL);
+
+    return EXIT_FAILURE;
+}
+
+void test_tool_foreach(int (*cb)(const test_tool_t*, void*), void* arg)
+{
+    size_t i;
+    for (i = 0; i < TEST_ARRAY_SIZE(g_command_table); i++)
+    {
+        if (cb(g_command_table[i], arg))
+        {
+            return;
+        }
+    }
+}
diff --git a/test2/tools/__init__.h b/test2/tools/__init__.h
new file mode 100644
index 0000000..fa58a1b
--- /dev/null
+++ b/test2/tools/__init__.h
@@ -0,0 +1,20 @@
+#ifndef __CUTEST_TEST_TOOL_INIT_H__
+#define __CUTEST_TEST_TOOL_INIT_H__
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct test_tool
+{
+    const char* cmd;
+    int (*proc)(int argc, char* argv[]);
+    const char* help;
+} test_tool_t;
+
+int test_tool_exec(int argc, char* argv[]);
+void test_tool_foreach(int (*cb)(const test_tool_t*, void*), void* arg);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/test2/tools/help.c b/test2/tools/help.c
new file mode 100644
index 0000000..95b4fa0
--- /dev/null
+++ b/test2/tools/help.c
@@ -0,0 +1,72 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include "__init__.h"
+
+static const char* s_help_str =
+"This program contains tests written using cutest. You can use the\n"
+"following command line flags to control its behavior:\n"
+"\n"
+"Test Selection:\n"
+"  --help\n"
+"      Show what features cutest support.\n"
+"\n"
+"Tool Selection:\n"
+"  --\n"
+"      By using `-- [CMD]` (pay attention to the space) you are able to launch\n"
+"      builtin tools. Anything followed by `--` will be treat as command\n"
+"      arguments to builtin tools. After builtin tools finished, the program\n"
+"      will exit.\n"
+;
+
+static void _print_help(const char* help, const char* prefix)
+{
+    size_t i;
+    int flag_need_prefix = 1;
+
+    for (i = 0; help[i] != '\0'; i++)
+    {
+        if (flag_need_prefix)
+        {
+            flag_need_prefix = 0;
+            printf("%s", prefix);
+        }
+
+        printf("%c", help[i]);
+
+        if (help[i] == '\n')
+        {
+            flag_need_prefix = 1;
+        }
+    }
+
+    printf("\n");
+}
+
+static int _print_tools(const test_tool_t* info, void* arg)
+{
+    (void)arg;
+
+    printf("  -- %s\n", info->cmd);
+    if (info->help != NULL)
+    {
+        _print_help(info->help, "      ");
+    }
+    return 0;
+}
+
+static int _tool_help(int argc, char* argv[])
+{
+    (void)argc; (void)argv;
+
+    printf("%s", s_help_str);
+    test_tool_foreach(_print_tools, NULL);
+
+    fflush(NULL);
+
+    return EXIT_SUCCESS;
+}
+
+const test_tool_t test_tool_help = {
+    "help", _tool_help,
+    "Show this help and exit."
+};