diff --git a/port/linux/package/pikascript/pikascript-lib/GTestTask/GTestTask.c b/port/linux/package/pikascript/pikascript-lib/GTestTask/GTestTask.c
index 1e637ffd1..1c728b31e 100644
--- a/port/linux/package/pikascript/pikascript-lib/GTestTask/GTestTask.c
+++ b/port/linux/package/pikascript/pikascript-lib/GTestTask/GTestTask.c
@@ -16,5 +16,7 @@ void GTestTask___init__(PikaObj* self) {
 }
 
 char* GTestTask_Task_returnNullString(PikaObj* self) {
+    obj_setErrorCode(self, 3);
+    __platform_printf("returnNullString\n");
     return NULL;
 }
diff --git a/port/linux/test/pikaMain-test.cpp b/port/linux/test/pikaMain-test.cpp
index e12a34bcf..d67e7a9cd 100644
--- a/port/linux/test/pikaMain-test.cpp
+++ b/port/linux/test/pikaMain-test.cpp
@@ -2467,8 +2467,6 @@ TEST(pikaMain, returnNullString) {
     /* assert */
     ArgType type = arg_getType(s);
     EXPECT_EQ(type, ARG_TYPE_NONE);
-    EXPECT_STREQ(log_buff[0], "s is None\r\n");
-    EXPECT_STREQ(log_buff[1], "BEGIN\r\n");
     /* deinit */
     obj_deinit(pikaMain);
     EXPECT_EQ(pikaMemNow(), 0);
diff --git a/src/PikaVersion.h b/src/PikaVersion.h
index 9bbe037e3..7dc71694f 100644
--- a/src/PikaVersion.h
+++ b/src/PikaVersion.h
@@ -2,4 +2,4 @@
 #define PIKA_VERSION_MINOR       9
 #define PIKA_VERSION_MICRO       0
 
-#define PIKA_EDIT_TIME      "2022/07/06 10:54:01"
+#define PIKA_EDIT_TIME      "2022/07/06 11:03:07"