diff --git a/src/config.rs b/src/config.rs
index 80434c9..ac0d3cf 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -7,8 +7,11 @@
 pub(crate) mod hooks;
 pub(crate) mod progress_options;
 
-use std::fmt::Debug;
-use std::{collections::HashMap, path::PathBuf};
+use std::{
+    collections::BTreeMap,
+    fmt::{self, Display, Formatter},
+    path::PathBuf,
+};
 
 use abscissa_core::{config::Config, path::AbsPathBuf, FrameworkError};
 use anyhow::Result;
@@ -83,6 +86,15 @@ pub struct RusticConfig {
     pub webdav: Option<Value>,
 }
 
+impl Display for RusticConfig {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        let config = toml::to_string_pretty(self)
+            .unwrap_or_else(|_| "<Error serializing config>".to_string());
+
+        write!(f, "{config}",)
+    }
+}
+
 impl RusticConfig {
     /// Merge a profile into the current config by reading the corresponding config file.
     /// Also recursively merge all profiles given within this config file.
@@ -176,8 +188,8 @@ pub struct GlobalOptions {
 
     /// List of environment variables to set (only in config file)
     #[clap(skip)]
-    #[merge(strategy = conflate::hashmap::append_or_ignore)]
-    pub env: HashMap<String, String>,
+    #[merge(strategy = conflate::btreemap::append_or_ignore)]
+    pub env: BTreeMap<String, String>,
 }
 
 /// Get the paths to the config file
@@ -245,7 +257,7 @@ fn get_global_config_path() -> Option<PathBuf> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use insta::assert_debug_snapshot;
+    use insta::{assert_debug_snapshot, assert_snapshot};
 
     #[test]
     fn test_default_config_passes() {
@@ -253,4 +265,35 @@ mod tests {
 
         assert_debug_snapshot!(config);
     }
+
+    #[test]
+    fn test_default_config_display_passes() {
+        let config = RusticConfig::default();
+
+        assert_snapshot!(config);
+    }
+
+    #[test]
+    fn test_global_env_roundtrip_passes() {
+        let mut config = RusticConfig::default();
+
+        for i in 0..10 {
+            let _ = config
+                .global
+                .env
+                .insert(format!("KEY{}", i), format!("VALUE{}", i));
+        }
+
+        let serialized = toml::to_string(&config).unwrap();
+
+        // Check Serialization
+        assert_snapshot!(serialized);
+
+        let deserialized: RusticConfig = toml::from_str(&serialized).unwrap();
+        // Check Deserialization and Display
+        assert_snapshot!(deserialized);
+
+        // Check Debug
+        assert_debug_snapshot!(deserialized);
+    }
 }
diff --git a/src/snapshots/rustic_rs__config__tests__default_config_display_passes.snap b/src/snapshots/rustic_rs__config__tests__default_config_display_passes.snap
new file mode 100644
index 0000000..28132de
--- /dev/null
+++ b/src/snapshots/rustic_rs__config__tests__default_config_display_passes.snap
@@ -0,0 +1,89 @@
+---
+source: src/config.rs
+expression: config
+---
+[global]
+use-profiles = []
+dry-run = false
+check-index = false
+no-progress = false
+
+[global.hooks]
+run-before = []
+run-after = []
+run-failed = []
+run-finally = []
+
+[global.env]
+
+[repository]
+no-cache = false
+warm-up = false
+
+[repository.options]
+
+[repository.options-hot]
+
+[repository.options-cold]
+
+[repository.hooks]
+run-before = []
+run-after = []
+run-failed = []
+run-finally = []
+
+[snapshot-filter]
+filter-hosts = []
+filter-labels = []
+filter-paths = []
+filter-paths-exact = []
+filter-tags = []
+filter-tags-exact = []
+
+[backup]
+stdin-filename = ""
+with-atime = false
+ignore-devid = false
+no-scan = false
+json = false
+long = false
+quiet = false
+init = false
+skip-identical-parent = false
+force = false
+ignore-ctime = false
+ignore-inode = false
+globs = []
+iglobs = []
+glob-files = []
+iglob-files = []
+git-ignore = false
+no-require-git = false
+custom-ignorefiles = []
+exclude-if-present = []
+one-file-system = false
+tags = []
+delete-never = false
+snapshots = []
+sources = []
+
+[backup.hooks]
+run-before = []
+run-after = []
+run-failed = []
+run-finally = []
+
+[copy]
+targets = []
+
+[forget]
+prune = false
+filter-hosts = []
+filter-labels = []
+filter-paths = []
+filter-paths-exact = []
+filter-tags = []
+filter-tags-exact = []
+
+[webdav]
+symlinks = false
diff --git a/src/snapshots/rustic_rs__config__tests__global_env_roundtrip_passes-2.snap b/src/snapshots/rustic_rs__config__tests__global_env_roundtrip_passes-2.snap
new file mode 100644
index 0000000..5002206
--- /dev/null
+++ b/src/snapshots/rustic_rs__config__tests__global_env_roundtrip_passes-2.snap
@@ -0,0 +1,99 @@
+---
+source: src/config.rs
+expression: deserialized
+---
+[global]
+use-profiles = []
+dry-run = false
+check-index = false
+no-progress = false
+
+[global.hooks]
+run-before = []
+run-after = []
+run-failed = []
+run-finally = []
+
+[global.env]
+KEY0 = "VALUE0"
+KEY1 = "VALUE1"
+KEY2 = "VALUE2"
+KEY3 = "VALUE3"
+KEY4 = "VALUE4"
+KEY5 = "VALUE5"
+KEY6 = "VALUE6"
+KEY7 = "VALUE7"
+KEY8 = "VALUE8"
+KEY9 = "VALUE9"
+
+[repository]
+no-cache = false
+warm-up = false
+
+[repository.options]
+
+[repository.options-hot]
+
+[repository.options-cold]
+
+[repository.hooks]
+run-before = []
+run-after = []
+run-failed = []
+run-finally = []
+
+[snapshot-filter]
+filter-hosts = []
+filter-labels = []
+filter-paths = []
+filter-paths-exact = []
+filter-tags = []
+filter-tags-exact = []
+
+[backup]
+stdin-filename = ""
+with-atime = false
+ignore-devid = false
+no-scan = false
+json = false
+long = false
+quiet = false
+init = false
+skip-identical-parent = false
+force = false
+ignore-ctime = false
+ignore-inode = false
+globs = []
+iglobs = []
+glob-files = []
+iglob-files = []
+git-ignore = false
+no-require-git = false
+custom-ignorefiles = []
+exclude-if-present = []
+one-file-system = false
+tags = []
+delete-never = false
+snapshots = []
+sources = []
+
+[backup.hooks]
+run-before = []
+run-after = []
+run-failed = []
+run-finally = []
+
+[copy]
+targets = []
+
+[forget]
+prune = false
+filter-hosts = []
+filter-labels = []
+filter-paths = []
+filter-paths-exact = []
+filter-tags = []
+filter-tags-exact = []
+
+[webdav]
+symlinks = false
diff --git a/src/snapshots/rustic_rs__config__tests__global_env_roundtrip_passes-3.snap b/src/snapshots/rustic_rs__config__tests__global_env_roundtrip_passes-3.snap
new file mode 100644
index 0000000..4cfdd06
--- /dev/null
+++ b/src/snapshots/rustic_rs__config__tests__global_env_roundtrip_passes-3.snap
@@ -0,0 +1,206 @@
+---
+source: src/config.rs
+expression: deserialized
+---
+RusticConfig {
+    global: GlobalOptions {
+        use_profiles: [],
+        dry_run: false,
+        check_index: false,
+        log_level: None,
+        log_file: None,
+        progress_options: ProgressOptions {
+            no_progress: false,
+            progress_interval: None,
+        },
+        hooks: Hooks {
+            run_before: [],
+            run_after: [],
+            run_failed: [],
+            run_finally: [],
+            context: "",
+        },
+        env: {
+            "KEY0": "VALUE0",
+            "KEY1": "VALUE1",
+            "KEY2": "VALUE2",
+            "KEY3": "VALUE3",
+            "KEY4": "VALUE4",
+            "KEY5": "VALUE5",
+            "KEY6": "VALUE6",
+            "KEY7": "VALUE7",
+            "KEY8": "VALUE8",
+            "KEY9": "VALUE9",
+        },
+    },
+    repository: AllRepositoryOptions {
+        be: BackendOptions {
+            repository: None,
+            repo_hot: None,
+            options: {},
+            options_hot: {},
+            options_cold: {},
+        },
+        repo: RepositoryOptions {
+            password: None,
+            password_file: None,
+            password_command: None,
+            no_cache: false,
+            cache_dir: None,
+            warm_up: false,
+            warm_up_command: None,
+            warm_up_wait: None,
+        },
+        hooks: Hooks {
+            run_before: [],
+            run_after: [],
+            run_failed: [],
+            run_finally: [],
+            context: "",
+        },
+    },
+    snapshot_filter: SnapshotFilter {
+        filter_hosts: [],
+        filter_labels: [],
+        filter_paths: [],
+        filter_paths_exact: [],
+        filter_tags: [],
+        filter_tags_exact: [],
+        filter_after: None,
+        filter_before: None,
+        filter_size: None,
+        filter_size_added: None,
+        filter_fn: None,
+    },
+    backup: BackupCmd {
+        cli_sources: [],
+        stdin_filename: "",
+        stdin_command: None,
+        as_path: None,
+        ignore_save_opts: LocalSourceSaveOptions {
+            with_atime: false,
+            ignore_devid: false,
+        },
+        no_scan: false,
+        json: false,
+        long: false,
+        quiet: false,
+        init: false,
+        parent_opts: ParentOptions {
+            group_by: None,
+            parent: None,
+            skip_identical_parent: false,
+            force: false,
+            ignore_ctime: false,
+            ignore_inode: false,
+        },
+        ignore_filter_opts: LocalSourceFilterOptions {
+            globs: [],
+            iglobs: [],
+            glob_files: [],
+            iglob_files: [],
+            git_ignore: false,
+            no_require_git: false,
+            custom_ignorefiles: [],
+            exclude_if_present: [],
+            one_file_system: false,
+            exclude_larger_than: None,
+        },
+        snap_opts: SnapshotOptions {
+            label: None,
+            tags: [],
+            description: None,
+            description_from: None,
+            time: None,
+            delete_never: false,
+            delete_after: None,
+            host: None,
+            command: None,
+        },
+        key_opts: KeyOptions {
+            hostname: None,
+            username: None,
+            with_created: false,
+        },
+        config_opts: ConfigOptions {
+            set_compression: None,
+            set_version: None,
+            set_append_only: None,
+            set_treepack_size: None,
+            set_treepack_size_limit: None,
+            set_treepack_growfactor: None,
+            set_datapack_size: None,
+            set_datapack_growfactor: None,
+            set_datapack_size_limit: None,
+            set_min_packsize_tolerate_percent: None,
+            set_max_packsize_tolerate_percent: None,
+            set_extra_verify: None,
+        },
+        hooks: Hooks {
+            run_before: [],
+            run_after: [],
+            run_failed: [],
+            run_finally: [],
+            context: "",
+        },
+        snapshots: [],
+        sources: [],
+    },
+    copy: CopyCmd {
+        ids: [],
+        init: false,
+        targets: [],
+        key_opts: KeyOptions {
+            hostname: None,
+            username: None,
+            with_created: false,
+        },
+    },
+    forget: ForgetOptions {
+        group_by: None,
+        prune: false,
+        filter: SnapshotFilter {
+            filter_hosts: [],
+            filter_labels: [],
+            filter_paths: [],
+            filter_paths_exact: [],
+            filter_tags: [],
+            filter_tags_exact: [],
+            filter_after: None,
+            filter_before: None,
+            filter_size: None,
+            filter_size_added: None,
+            filter_fn: None,
+        },
+        keep: KeepOptions {
+            keep_tags: [],
+            keep_ids: [],
+            keep_last: None,
+            keep_hourly: None,
+            keep_daily: None,
+            keep_weekly: None,
+            keep_monthly: None,
+            keep_quarter_yearly: None,
+            keep_half_yearly: None,
+            keep_yearly: None,
+            keep_within: None,
+            keep_within_hourly: None,
+            keep_within_daily: None,
+            keep_within_weekly: None,
+            keep_within_monthly: None,
+            keep_within_quarter_yearly: None,
+            keep_within_half_yearly: None,
+            keep_within_yearly: None,
+            keep_none: false,
+        },
+    },
+    mount: None,
+    webdav: WebDavCmd {
+        address: None,
+        path_template: None,
+        time_template: None,
+        symlinks: false,
+        file_access: None,
+        snapshot_path: None,
+    },
+}
diff --git a/src/snapshots/rustic_rs__config__tests__global_env_roundtrip_passes.snap b/src/snapshots/rustic_rs__config__tests__global_env_roundtrip_passes.snap
new file mode 100644
index 0000000..6c1e84f
--- /dev/null
+++ b/src/snapshots/rustic_rs__config__tests__global_env_roundtrip_passes.snap
@@ -0,0 +1,99 @@
+---
+source: src/config.rs
+expression: serialized
+---
+[global]
+use-profiles = []
+dry-run = false
+check-index = false
+no-progress = false
+
+[global.hooks]
+run-before = []
+run-after = []
+run-failed = []
+run-finally = []
+
+[global.env]
+KEY0 = "VALUE0"
+KEY1 = "VALUE1"
+KEY2 = "VALUE2"
+KEY3 = "VALUE3"
+KEY4 = "VALUE4"
+KEY5 = "VALUE5"
+KEY6 = "VALUE6"
+KEY7 = "VALUE7"
+KEY8 = "VALUE8"
+KEY9 = "VALUE9"
+
+[repository]
+no-cache = false
+warm-up = false
+
+[repository.options]
+
+[repository.options-hot]
+
+[repository.options-cold]
+
+[repository.hooks]
+run-before = []
+run-after = []
+run-failed = []
+run-finally = []
+
+[snapshot-filter]
+filter-hosts = []
+filter-labels = []
+filter-paths = []
+filter-paths-exact = []
+filter-tags = []
+filter-tags-exact = []
+
+[backup]
+stdin-filename = ""
+with-atime = false
+ignore-devid = false
+no-scan = false
+json = false
+long = false
+quiet = false
+init = false
+skip-identical-parent = false
+force = false
+ignore-ctime = false
+ignore-inode = false
+globs = []
+iglobs = []
+glob-files = []
+iglob-files = []
+git-ignore = false
+no-require-git = false
+custom-ignorefiles = []
+exclude-if-present = []
+one-file-system = false
+tags = []
+delete-never = false
+snapshots = []
+sources = []
+
+[backup.hooks]
+run-before = []
+run-after = []
+run-failed = []
+run-finally = []
+
+[copy]
+targets = []
+
+[forget]
+prune = false
+filter-hosts = []
+filter-labels = []
+filter-paths = []
+filter-paths-exact = []
+filter-tags = []
+filter-tags-exact = []
+
+[webdav]
+symlinks = false