diff --git a/tests/test_backtrace.rs b/tests/test_backtrace.rs
index 8f11da3..2a4cffa 100644
--- a/tests/test_backtrace.rs
+++ b/tests/test_backtrace.rs
@@ -21,6 +21,11 @@ pub mod structs {
     use std::sync::Arc;
     use thiserror::Error;
 
+    mod not_backtrace {
+        #[derive(Debug)]
+        pub struct Backtrace;
+    }
+
     #[derive(Error, Debug)]
     #[error("...")]
     pub struct PlainBacktrace {
@@ -34,6 +39,12 @@ pub mod structs {
         backtrace: Backtrace,
     }
 
+    #[derive(Error, Debug)]
+    #[error("...")]
+    pub struct NotBacktrace {
+        backtrace: crate::structs::not_backtrace::r#Backtrace,
+    }
+
     #[derive(Error, Debug)]
     #[error("...")]
     pub struct OptBacktrace {