diff --git a/tests/test_downcast.rs b/tests/test_downcast.rs
index 3d7dc36..3b95931 100644
--- a/tests/test_downcast.rs
+++ b/tests/test_downcast.rs
@@ -22,3 +22,43 @@ fn test_downcast() {
             .to_string(),
     );
 }
+
+#[test]
+fn test_downcast_ref() {
+    assert_eq!(
+        "oh no!",
+        *bail_literal().unwrap_err().downcast_ref::<&str>().unwrap(),
+    );
+    assert_eq!(
+        "oh no!",
+        bail_fmt().unwrap_err().downcast_ref::<String>().unwrap(),
+    );
+    assert_eq!(
+        "oh no!",
+        bail_error()
+            .unwrap_err()
+            .downcast_ref::<io::Error>()
+            .unwrap()
+            .to_string(),
+    );
+}
+
+#[test]
+fn test_downcast_mut() {
+    assert_eq!(
+        "oh no!",
+        *bail_literal().unwrap_err().downcast_mut::<&str>().unwrap(),
+    );
+    assert_eq!(
+        "oh no!",
+        bail_fmt().unwrap_err().downcast_mut::<String>().unwrap(),
+    );
+    assert_eq!(
+        "oh no!",
+        bail_error()
+            .unwrap_err()
+            .downcast_mut::<io::Error>()
+            .unwrap()
+            .to_string(),
+    );
+}