diff --git a/Cargo.toml b/Cargo.toml
index cff3d7a..5cabe31 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,3 +19,4 @@ clap = "4.5.11"
 rpassword = "7.3.1"
 serde = {version = "1.0.204", features = ["derive"]}
 serde_json = "1.0.122"
+colored = "2.1.0"
diff --git a/src/config_spec.rs b/src/config_spec.rs
index 4f1ff99..58f64e4 100644
--- a/src/config_spec.rs
+++ b/src/config_spec.rs
@@ -17,15 +17,32 @@
 //! and then in the main module, glue them all together and use them to populate defaults etc.
 //!
 //! ```rust
+//! # mod modname {
+//! #     pub const CONFIG: CfgGroup<'static> = CfgGroup {
+//! #         name: "modname", // this will be the field name prefix in the KV store
+//! #         description: "what this module is for",
+//! #         fields: &[
+//! #             // full field name in the KV store will be `"modname-user"`
+//! #             CfgField::Default { key: "user", default: "xyzzy", description: "User name for someservice." },
+//! #             CfgField::Password { key: "password", description: "Password for someservice." },
+//! #             // also available: Optional, Generated, Silent
+//! #         ],
+//! #     };
+//! # }
 //! const CONFIG_SPEC: CfgSpec<'static> = CfgSpec {
 //!     groups: &[
 //!         modname::CONFIG,
 //!         // etc.
 //!     ],
 //! };
+//! // open a config file somewhere (we use a dummy to not cause side-effects)
+//! let config = KeyValueStore::new_dummy()?;
+//! assert_eq!( config.get("modname-user").unwrap(), "xyzzy" );
 //! // always:
-//! let config = KeyValueStore::new("config.sqlite");
 //! CONFIG_SPEC.populate_defaults(&config);
+//! ```
+//!
+//! ```ignore
 //! // only if you're explicitly wanting to check / edit the config:
 //! CONFIG_SPEC.interactive_check(config);
 //! ```
diff --git a/src/email.rs b/src/email.rs
index 13f783e..fdd735a 100644
--- a/src/email.rs
+++ b/src/email.rs
@@ -1,9 +1,9 @@
 use std::error::Error;
 
 use colored::Colorize;
-use lettre::{Message, SmtpTransport, Transport};
 use lettre::message::{header, SinglePart};
 use lettre::transport::smtp::authentication::Credentials;
+use lettre::{Message, SmtpTransport, Transport};
 use uuid::Uuid;
 
 use crate::config_spec::{CfgField, CfgGroup};
diff --git a/src/key_value.rs b/src/key_value.rs
index 14984d1..07c2171 100644
--- a/src/key_value.rs
+++ b/src/key_value.rs
@@ -1,8 +1,12 @@
 //! SQLite-backed key/value store, primarily intended as a config file (few writes).
 //!
-//! ```rust
+//! ```ignore
 //! // Open a new or existing DB (no distinction made.)
 //! let cfg = KeyValueStore::new("config.sqlite")?;
+//! ```
+//!
+//! ```
+//! # let cfg = KeyValueStore::new_dummy()?;
 //! // Ensure defaults exist. (Do this early, this function panics on error.)
 //! cfg.default( "foo", "bar" );
 //! cfg.default( "baz", "quux" );
@@ -16,13 +20,12 @@
 //! let all_ok = !cfg.has_errors();
 //! ```
 
+use colored::Colorize;
+use rusqlite::{params, Connection, Result};
 use std::cell::Cell;
 use std::collections::HashSet;
 use std::ops::Index;
 
-use colored::Colorize;
-use rusqlite::{Connection, params, Result};
-
 /// Simple SQLite-backed key/value store.
 ///
 /// All failing writes will log a message, any errors will set `has_errors`.
@@ -40,6 +43,17 @@ impl KeyValueStore {
     /// Open or create a DB with a `kv_store` table storing all tuples.
     pub fn new(db_path: &str) -> Result<Self> {
         let conn = Connection::open(db_path)?;
+        KeyValueStore::setup(conn)
+    }
+
+    /// Mostly for tests, make a temporary DB in memory.
+    pub fn new_dummy() -> Result<Self> {
+        let conn = Connection::open_in_memory()?;
+        KeyValueStore::setup(conn)
+    }
+
+    /// Actual constructor.
+    fn setup(conn: Connection) -> Result<Self> {
         conn.execute(
             "CREATE TABLE IF NOT EXISTS kv_store (
                   key TEXT PRIMARY KEY,
diff --git a/src/main.rs b/src/main.rs
index af06a4d..a29f986 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,18 +1,3 @@
-use std::borrow::Cow;
-use std::env;
-use std::error::Error;
-
-use chrono::{Datelike, Local, NaiveDate, Weekday};
-use clap::{Arg, Command};
-use colored::Colorize;
-use regex::Regex;
-use reqwest::blocking::Client;
-
-use config_spec::{CfgField, CfgGroup, CfgSpec};
-use email::{Email, SimpleEmail};
-use hedgedoc::HedgeDoc;
-use key_value::KeyValueStore as KV;
-
 // Dies ist der Plenumsbot vom Chaos Computer Club Berlin.
 /*
 Plenumsbot
@@ -44,18 +29,28 @@ MediaWiki
 future improvements:
 - search ADJ_TIMEYWIMEY to find places that need adjusting if the bot might run late
 (that's an incomplete list, but tag things as you notice them…)
+*/
 
+use chrono::{Datelike, Local, NaiveDate, Weekday};
+use clap::{Arg, Command};
+use colored::Colorize;
+use regex::Regex;
+use reqwest::blocking::Client;
+use std::borrow::Cow;
+use std::env;
+use std::error::Error;
 
- */
-// Import other .rs files as modules
 mod key_value;
+use key_value::KeyValueStore as KV;
 mod config_spec;
+use config_spec::{CfgField, CfgGroup, CfgSpec};
 mod template;
-
 pub mod variables_and_settings;
 
 mod email;
+use email::{Email, SimpleEmail};
 mod hedgedoc;
+use hedgedoc::HedgeDoc;
 mod mediawiki;
 
 const FALLBACK_TEMPLATE: &str = variables_and_settings::FALLBACK_TEMPLATE;
@@ -146,7 +141,7 @@ fn main() -> Result<(), Box<dyn Error>> {
 "#;
 
     println!("{}", ansi_art.red());
-    
+
     let args = parse_args();
     let config_file = args.config_file.as_str();
     let config = KV::new(config_file).unwrap();
@@ -234,7 +229,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     let auth_result = mediawiki::get_login_token(&Client::new(), &config.get("wiki-http-user").expect("HTTP User not found DB!"), &config.get("wiki-http-password").expect("HTTP Password not found DB!"))?;
     println!("---AUTH RESULT:---\n{}\n-----------", auth_result);
     // TEMPORÄR ENDE
-    
+
     let pad_content = hedgedoc.download(&current_pad_id).expect("Fehler beim Download des Pads!");
     let pad_content_without_top_instructions = try_to_remove_top_instructions(pad_content);
     println!("Pad-content geladen!");
diff --git a/src/template.rs b/src/template.rs
index d41de22..f6dfb1a 100644
--- a/src/template.rs
+++ b/src/template.rs
@@ -1,11 +1,16 @@
 use regex::{Captures, Regex};
 
-pub fn replace<F>( text: &str, replacer: F ) -> String where F: Fn(&Captures) -> String {
-    let regex = Regex::new( r"\{\{([\w_-]+)\}\}" ).unwrap();
+pub fn replace<F>(text: &str, replacer: F) -> String
+where
+    F: Fn(&Captures) -> String,
+{
+    let regex = Regex::new(r"\{\{([\w_-]+)\}\}").unwrap();
     regex.replace_all(text, replacer).into_owned()
 }
 
-pub fn config_replacer<'a>( config: &'a crate::KV, blacklist_substrings : &'a [&'a str] ) -> impl Fn(&Captures) -> String + 'a {
+pub fn config_replacer<'a>(
+    config: &'a crate::KV, blacklist_substrings: &'a [&'a str],
+) -> impl Fn(&Captures) -> String + 'a {
     move |caps: &Captures| {
         let key = &caps[1];
         if blacklist_substrings.iter().any(|&substr| key.contains(substr)) {