bevyengine/bevy · error

error deserializing CI testing configuration file

Error message

error deserializing CI testing configuration file

What it means

Logged by CiTestingPlugin::build when the CI testing configuration file (e.g. ci_testing_config.ron) exists but could not be deserialized into CiTestingConfig — the file's structure or types don't match the expected schema, so the default/empty config is used and custom CI behaviors are lost.

Source

Thrown at crates/bevy_dev_tools/src/ci_testing/mod.rs:42

/// This plugin is included within `DefaultPlugins` and `MinimalPlugins`
/// when the `bevy_ci_testing` feature is enabled.
/// It is recommended to only used this plugin during testing (manual or
/// automatic), and disable it during regular development and for production builds.
#[derive(Default)]
pub struct CiTestingPlugin;

impl Plugin for CiTestingPlugin {
    fn build(&self, app: &mut App) {
        let config = if !app.world().is_resource_added::<CiTestingConfig>() {
            // Load configuration from file if not already setup
            #[cfg(not(target_arch = "wasm32"))]
            let config: CiTestingConfig = {
                let filename = std::env::var("CI_TESTING_CONFIG")
                    .unwrap_or_else(|_| "ci_testing_config.ron".to_string());
                std::fs::read_to_string(filename)
                    .map(|content| {
                        ron::from_str(&content)
                            .expect("error deserializing CI testing configuration file")
                    })
                    .unwrap_or_default()
            };

            #[cfg(target_arch = "wasm32")]
            let config: CiTestingConfig = {
                let config = include_str!("../../../../ci_testing_config.ron");
                ron::from_str(config).expect("error deserializing CI testing configuration file")
            };

            config
        } else {
            app.world().resource::<CiTestingConfig>().clone()
        };

        // Add the `EasyCameraMovementPlugin` to the app if it's not already added.
        // To configure the movement speed, add the plugin first.
        if !app.is_plugin_added::<EasyCameraMovementPlugin>() {

View on GitHub (pinned to 396ca72708)

Solutions

1. Validate the config file against the CiTestingConfig schema (RON syntax, correct field names/types)
2. Check the inner deserialization error for the offending field
3. Remove or fix the broken config file

When it happens

Trigger: Thrown at crates/bevy_dev_tools/src/ci_testing/mod.rs:42 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of bevyengine/bevy@396ca72708 (2026-08-20). Data as JSON: /api/errors/39f6df2778a09f22. Report an issue: GitHub.