diff --git a/test/function_input_iterator_test.cpp b/test/function_input_iterator_test.cpp
index 0e3f97f..526f51c 100644
--- a/test/function_input_iterator_test.cpp
+++ b/test/function_input_iterator_test.cpp
@@ -6,7 +6,6 @@
 #include <cstddef>
 
 #include <algorithm>
-#include <iostream>
 #include <iterator>
 #include <vector>