diff --git a/imperative/python/megengine/logger.py b/imperative/python/megengine/logger.py
index 9e926ca3be8f9feb33fe93724e13d6432b0d2cda..49f25e55aa15a5e5c8e180445b4bc68f7f1c0a0d 100644
--- a/imperative/python/megengine/logger.py
+++ b/imperative/python/megengine/logger.py
@@ -12,7 +12,7 @@ import os
 import sys
 
 _all_loggers = []
-_default_level_name = os.getenv("MEGENGINE_LOGGING_LEVEL", "ERROR")
+_default_level_name = os.getenv("MEGENGINE_LOGGING_LEVEL", "INFO")
 _default_level = logging.getLevelName(_default_level_name.upper())
 
 
diff --git a/imperative/src/impl/ops/tensor_manip.cpp b/imperative/src/impl/ops/tensor_manip.cpp
index fdf9fac68fb1ebd24f510063fb913b4f193a9d2e..ae16edfd2719a88e24da5ad4b125395d10f06889 100644
--- a/imperative/src/impl/ops/tensor_manip.cpp
+++ b/imperative/src/impl/ops/tensor_manip.cpp
@@ -62,7 +62,7 @@ std::shared_ptr<OpDef> make_from_op_node(cg::OperatorNodeBase* node_) {
     if (node->config().comp_node().size() ||
             node->config().output_dtype().valid() ||
             node->param().axis != opr::GetVarShape::Param::INVALID_AXIS) {
-        mgb_log_warn("weird GetVarShape");
+        mgb_log_debug("weird GetVarShape");
         return OpTrait::find_by_typeinfo(OprAttr::typeinfo())->make_from_op_node(node);
     }
     return GetVarShape::make();