diff --git a/port/linux/.vscode/launch.json b/port/linux/.vscode/launch.json
index 3547a7830..af2c7f8b8 100644
--- a/port/linux/.vscode/launch.json
+++ b/port/linux/.vscode/launch.json
@@ -11,7 +11,7 @@
             "program": "${workspaceFolder}/build/test/pikascript_test",
             // "program": "${workspaceFolder}/build/boot/demo06-pikamain/pikascript_demo06-pikamain",
             "args": [
-                // "--gtest_filter=vm.getattr_native"
+                "--gtest_filter=vm.dir_print_arg"
             ],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
diff --git a/src/dataArg.c b/src/dataArg.c
index 568dce0d5..2593d20d8 100644
--- a/src/dataArg.c
+++ b/src/dataArg.c
@@ -318,7 +318,11 @@ Arg* arg_toStrArg(Arg* arg) {
                 strEqu(method_store->name, "tuple")) {
                 pika_platform_snprintf(buff, PIKA_SPRINTF_BUFF_SIZE,
                                        "<class '%s'>", method_store->name);
+                return arg_newStr(buff);
             }
+            pika_platform_snprintf(buff, PIKA_SPRINTF_BUFF_SIZE,
+                                   "<built-in function %s>",
+                                   method_store->name);
             return arg_newStr(buff);
         }
         if (argType_isConstructor(type)) {
@@ -338,7 +342,7 @@ Arg* arg_toStrArg(Arg* arg) {
     }
     if (type == ARG_TYPE_OBJECT_META) {
         pika_platform_snprintf(buff, PIKA_SPRINTF_BUFF_SIZE,
-                               "<mate object at %p>", arg_getPtr(arg));
+                               "<meta object at %p>", arg_getPtr(arg));
         return arg_newStr(buff);
     }
     return NULL;
diff --git a/test/VM-test.cpp b/test/VM-test.cpp
index 1d1223213..befc6cc05 100644
--- a/test/VM-test.cpp
+++ b/test/VM-test.cpp
@@ -2711,6 +2711,25 @@ TEST(vm, type_fullfealure){
     obj_deinit(pikaMain);
     EXPECT_EQ(pikaMemNow(), 0);
 }
+
+
+TEST(vm, dir_print_arg){
+    /* init */
+    pikaMemInfo.heapUsedMax = 0;
+    PikaObj* pikaMain = newRootObj("pikaMain", New_PikaMain);
+    extern unsigned char pikaModules_py_a[];
+    obj_linkLibrary(pikaMain, pikaModules_py_a);
+    /* run */
+    __platform_printf("BEGIN\r\n");
+    obj_run(pikaMain, "print(dir)\r\n");
+    /* collect */
+    /* assert */
+    EXPECT_STREQ(log_buff[0], "<built-in function dir>\r\n");
+    /* deinit */
+    obj_deinit(pikaMain);
+    EXPECT_EQ(pikaMemNow(), 0);
+}
+
 #endif
 
 TEST_END
\ No newline at end of file