diff --git a/test/libsolidity/analysis/FunctionCallGraph.cpp b/test/libsolidity/analysis/FunctionCallGraph.cpp
index 3646b9a99..a09a8a291 100644
--- a/test/libsolidity/analysis/FunctionCallGraph.cpp
+++ b/test/libsolidity/analysis/FunctionCallGraph.cpp
@@ -39,7 +39,6 @@
 #include <range/v3/view/set_algorithm.hpp>
 #include <range/v3/view/transform.hpp>
 
-#include <functional>
 #include <memory>
 #include <ostream>
 #include <set>
@@ -173,8 +172,8 @@ void checkCallGraphExpectations(
 
 ostream& operator<<(ostream& _out, EdgeNames const& _edgeNames)
 {
-	for (auto const& edge: _edgeNames | to<vector>() | actions::sort(std::less()))
-		_out << "    " << get<0>(edge) << " -> " << get<1>(edge) << endl;
+	for (auto const& [from, to]: _edgeNames)
+		_out << "    " << from << " -> " << to << endl;
 	return _out;
 }