What if I do the expect with format too, does actions like that?

tests/strip_ansi.rs

@@ -28,6 +28,6 @@ mod integration {
         cmd.arg("-c");
         cmd.write_stdin(format!("{}\n{}", "test.rs".blue(), "test.rb".red()))
             .assert()
-            .stdout(" \x1b[34mtest.rs\x1B[0m\n \x1b[31mtest.rb\x1b[0m\n");
+            .stdout(format!(" {}\n {}\n", "test.rs".blue(), "test.rb".red()));
     }
 }