diff --git a/utils_unittest.cc b/utils_unittest.cc
index 44d1b87..0e29113 100644
--- a/utils_unittest.cc
+++ b/utils_unittest.cc
@@ -309,9 +309,8 @@
   utils::ApplyMap(&collection, value_map);
 
   size_t index = 0;
-  for (vector<int>::iterator it = collection.begin(), e = collection.end();
-       it != e; ++it) {
-    EXPECT_EQ(expected_values[index++], *it);
+  for (const int value : collection) {
+    EXPECT_EQ(expected_values[index++], value);
   }
 }