diff --git a/compiler/utils/assembler_test.h b/compiler/utils/assembler_test.h
index 5c6bf13..09146ea 100644
--- a/compiler/utils/assembler_test.h
+++ b/compiler/utils/assembler_test.h
@@ -59,7 +59,7 @@
     return assembler_.get();
   }
 
-  typedef std::string (*TestFn)(AssemblerTest* assembler_test, Ass* assembler);
+  using TestFn = std::string (*)(AssemblerTest *, Ass *);
 
   void DriverFn(TestFn f, const std::string& test_name) {
     DriverWrapper(f(this, assembler_.get()), test_name);