diff --git a/src/configure.rs b/src/configure.rs
index 99e2d2e..14e6f39 100644
--- a/src/configure.rs
+++ b/src/configure.rs
@@ -285,7 +285,7 @@ mod tests {
 
             assert_eq!(
                 format!("{}", config),
-                format!(r#"{{"root":["{}"]}}"#, target_dir.replace("\\", "\\\\"))
+                format!(r#"{{"root":["{}"]}}"#, target_dir.replace('\\', "\\\\"))
             );
 
             config.reset().unwrap();