diff --git a/13_integrated_testing/test-macros/src/lib.rs b/13_integrated_testing/test-macros/src/lib.rs
index 6a431c9b..092c4806 100644
--- a/13_integrated_testing/test-macros/src/lib.rs
+++ b/13_integrated_testing/test-macros/src/lib.rs
@@ -2,8 +2,6 @@
 //
 // Copyright (c) 2019-2020 Andre Richter <andre.o.richter@gmail.com>
 
-extern crate proc_macro;
-
 use proc_macro::TokenStream;
 use proc_macro2::Span;
 use quote::quote;