diff --git a/test/cctest/inspector/test_network_requests_buffer.cc b/test/cctest/inspector/test_network_requests_buffer.cc
index 4f02ffb51e29b1..40461e95ff490e 100644
--- a/test/cctest/inspector/test_network_requests_buffer.cc
+++ b/test/cctest/inspector/test_network_requests_buffer.cc
@@ -168,7 +168,7 @@ TEST(RequestsBuffer, EnforceLimit) {
     buffer.find("4")->second.push_request_data_blob(
         protocol::Binary::fromSpan(kDummyData, 10));
     // "3" and "4" are kept.
-    EXPECT_EQ(buffer.total_buffer_size(), 15);
+    EXPECT_EQ(buffer.total_buffer_size(), 15u);
   }
 
   EXPECT_FALSE(buffer.contains("1"));