diff --git a/crates/egui_demo_lib/src/demo/demo_app_windows.rs b/crates/egui_demo_lib/src/demo/demo_app_windows.rs
index 8729d148f11..5b57c675b5a 100644
--- a/crates/egui_demo_lib/src/demo/demo_app_windows.rs
+++ b/crates/egui_demo_lib/src/demo/demo_app_windows.rs
@@ -426,7 +426,7 @@ mod tests {
 
             let result = harness.try_wgpu_snapshot_options(&format!("demos/{name}"), &options);
             if let Err(err) = result {
-                errors.push(err);
+                errors.push(err.to_string());
             }
         }