diff --git a/components/micropython/vendor/py/builtinimport.c b/components/micropython/vendor/py/builtinimport.c
index e620c03774c0bfbc245f77654ffb1b7e8b4e7d2d..e0c1fbb849d80929162a418387defe169a9b0c1e 100644
--- a/components/micropython/vendor/py/builtinimport.c
+++ b/components/micropython/vendor/py/builtinimport.c
@@ -507,7 +507,7 @@ mp_obj_t mp_builtin___import___default(size_t n_args, const mp_obj_t *args) {
         if (n_args >= 5) {
             level = MP_OBJ_SMALL_INT_VALUE(args[4]);
             if (level < 0) {
-                mp_raise_ValueError(NULL);
+                mp_raise_ValueError(MP_ERROR_TEXT("foo"));
             }
         }
     }
@@ -521,7 +521,7 @@ mp_obj_t mp_builtin___import___default(size_t n_args, const mp_obj_t *args) {
     }
 
     if (module_name_len == 0) {
-        mp_raise_ValueError(NULL);
+        mp_raise_ValueError(MP_ERROR_TEXT("bar"));
     }
 
     DEBUG_printf("Starting module search for '%s'\n", module_name);