diff --git a/paddle/fluid/framework/ir/graph_helper_test.cc b/paddle/fluid/framework/ir/graph_helper_test.cc
index b517442bb73f43bc1cb1d639b6c6cf004b28d4cf..a260dd3da2a7863c06e51aa4feafd824ea254139 100644
--- a/paddle/fluid/framework/ir/graph_helper_test.cc
+++ b/paddle/fluid/framework/ir/graph_helper_test.cc
@@ -116,8 +116,8 @@ TEST(GraphHelperTest, Basic) {
   for (size_t i = 0; i < sorted.size(); ++i) {
     node_map[sorted[i]->Name()] = i;
   }
-  ASSERT_EQ(node_map.at("op1"), 0);
-  ASSERT_EQ(node_map.at("op2"), 1);
+  ASSERT_EQ(node_map.at("op1"), 0UL);
+  ASSERT_EQ(node_map.at("op2"), 1UL);
   ASSERT_TRUE(node_map.at("op3") < node_map.at("op5"));
 }
 }  // namespace ir
diff --git a/paddle/fluid/framework/ir/graph_test.cc b/paddle/fluid/framework/ir/graph_test.cc
index 73ef55756c330bdbc3be89c436967b2a88625a43..f9e6bdf3625bdced9d1a9195a979b0f46016d8bf 100644
--- a/paddle/fluid/framework/ir/graph_test.cc
+++ b/paddle/fluid/framework/ir/graph_test.cc
@@ -97,15 +97,15 @@ TEST(GraphTest, Basic) {
   std::vector<ir::Node *> nodes(g->Nodes().begin(), g->Nodes().end());
   for (ir::Node *n : nodes) {
     if (n->Name() == "sum") {
-      ASSERT_EQ(n->inputs.size(), 3);
-      ASSERT_EQ(n->outputs.size(), 1);
+      ASSERT_EQ(n->inputs.size(), 3UL);
+      ASSERT_EQ(n->outputs.size(), 1UL);
     } else if (n->Name() == "test_a" || n->Name() == "test_b" ||
                n->Name() == "test_c") {
-      ASSERT_EQ(n->inputs.size(), 0);
-      ASSERT_EQ(n->outputs.size(), 1);
+      ASSERT_EQ(n->inputs.size(), 0UL);
+      ASSERT_EQ(n->outputs.size(), 1UL);
     } else if (n->Name() == "test_out") {
-      ASSERT_EQ(n->inputs.size(), 1);
-      ASSERT_EQ(n->outputs.size(), 0);
+      ASSERT_EQ(n->inputs.size(), 1UL);
+      ASSERT_EQ(n->outputs.size(), 0UL);
     }
   }
   ASSERT_EQ(nodes.size(), 5);