diff --git a/failure_derive/tests/wraps.rs b/failure_derive/tests/wraps.rs
index 2049273..8cbe3c0 100644
--- a/failure_derive/tests/wraps.rs
+++ b/failure_derive/tests/wraps.rs
@@ -58,8 +58,11 @@ fn wrap_backtrace_error() {
         .and_then(|err| err.downcast_ref::<io::Error>())
         .is_some());
     assert!(err.backtrace().is_some());
-    assert!(err.backtrace().is_empty());
-    assert_eq!(err.backtrace().is_empty(), err.backtrace().to_string().trim().is_empty());
+    assert!(err.backtrace().unwrap().is_empty());
+    assert_eq!(
+        err.backtrace().unwrap().is_empty(),
+        err.backtrace().unwrap().to_string().trim().is_empty()
+    );
 }
 
 #[derive(Fail, Debug)]
@@ -93,6 +96,9 @@ fn wrap_enum_error() {
         .and_then(|err| err.downcast_ref::<fmt::Error>())
         .is_some());
     assert!(err.backtrace().is_some());
-    assert!(err.backtrace().is_empty());
-    assert_eq!(err.backtrace().is_empty(), err.backtrace().to_string().trim().is_empty());
+    assert!(err.backtrace().unwrap().is_empty());
+    assert_eq!(
+        err.backtrace().unwrap().is_empty(),
+        err.backtrace().unwrap().to_string().trim().is_empty()
+    );
 }