diff --git a/src/game/mod.rs b/src/game/mod.rs
index fedc34a..ee15947 100644
--- a/src/game/mod.rs
+++ b/src/game/mod.rs
@@ -107,16 +107,16 @@ impl<'wl, WL: WordList> Game<'wl, WL> {
         if self.finished() || self.step > self.max_steps {
             return Err(GameError::TryingToPlayAFinishedGame);
         }
-        if self.wordlist.get_word(&guess).is_none() {
+        if self.wordlist.get_word(guess).is_none() {
             return Err(GameError::WordNotInWordlist(guess.to_string()));
         }
         self.step += 1;
 
         let response;
         if eval.is_some() && self.solution.is_none() {
-            response = GuessResponse::new(&guess, eval.unwrap(), self);
+            response = GuessResponse::new(guess, eval.unwrap(), self);
         } else if let Some(solution) = self.solution.clone() {
-            response = GuessResponse::new(&guess, Self::evaluate(solution, &guess), self);
+            response = GuessResponse::new(guess, Self::evaluate(solution, guess), self);
         } else {
             panic!("there is neither an evaluation nor a predefined solution for this guess");
         }
diff --git a/src/solve/naive/states.rs b/src/solve/naive/states.rs
index c5f9fd9..6b92c89 100644
--- a/src/solve/naive/states.rs
+++ b/src/solve/naive/states.rs
@@ -2,7 +2,6 @@ use std::collections::{HashMap, HashSet};
 use std::fmt::Debug;
 use std::ops::{Range, RangeBounds};
 
-use crate::error::WResult;
 use crate::wlist::word::Word;
 
 pub(crate) type CharMap = HashMap<char, CharInfo>;
diff --git a/src/wlist/mod.rs b/src/wlist/mod.rs
index 57b2f8c..24f7324 100644
--- a/src/wlist/mod.rs
+++ b/src/wlist/mod.rs
@@ -94,7 +94,7 @@ pub trait WordList: Clone + std::fmt::Debug + Default + Sync + Display {
         buf
     }
     fn get_words_matching(&self, pattern: &str) -> WResult<Vec<WordData>> {
-        let pattern = Regex::new(&pattern).map_err(WordlistError::from)?;
+        let pattern = Regex::new(pattern).map_err(WordlistError::from)?;
         let hay = self.raw_wordlist();
         let keys = pattern.captures_iter(&hay);
         let mut buf = Vec::new();
diff --git a/tests/solver.rs b/tests/solver.rs
index 85f56f7..4cad1c0 100644
--- a/tests/solver.rs
+++ b/tests/solver.rs
@@ -21,135 +21,3 @@ fn test_build_builtin_solvers() {
     let _naive_solver =
         AnyBuiltinSolver::Naive(NaiveSolver::build(&wl).expect("could not build naive solver"));
 }
-
-#[test]
-fn test_naive_play_predetermined_game() -> anyhow::Result<()> {
-    let wl = wordlist();
-    let sl =
-        AnyBuiltinSolver::Naive(NaiveSolver::build(&wl).expect("could not build naive solver"));
-    let mut game = Game::build(5, false, 6, &wl, false)?;
-    game.set_solution(Some(("nines".into(), 0.002))); // The accuracy is made up but shouldn't
-                                                      // matter
-    sl.make_a_move(&mut game)?;
-    assert_eq!(
-        game.responses().last().unwrap().guess(),
-        &Word::from("which")
-    );
-    sl.make_a_move(&mut game)?;
-    assert_eq!(
-        game.responses().last().unwrap().guess(),
-        &Word::from("first")
-    );
-    sl.make_a_move(&mut game)?;
-    assert_eq!(
-        game.responses().last().unwrap().guess(),
-        &Word::from("lives")
-    );
-    sl.make_a_move(&mut game)?;
-    assert_eq!(
-        game.responses().last().unwrap().guess(),
-        &Word::from("sides")
-    );
-    sl.make_a_move(&mut game)?;
-    assert_eq!(
-        game.responses().last().unwrap().guess(),
-        &Word::from("mines")
-    );
-    sl.make_a_move(&mut game)?;
-    assert_eq!(
-        game.responses().last().unwrap().guess(),
-        &Word::from("pines")
-    );
-    sl.make_a_move(&mut game)?;
-    assert_eq!(
-        game.responses().last().unwrap().guess(),
-        &Word::from("nines")
-    );
-
-    assert!(game.finished());
-    assert!(game.won());
-
-    Ok(())
-}
-
-#[test]
-fn test_naive_play_predetermined_game_manually() -> anyhow::Result<()> {
-    let wl = wordlist();
-    let sl =
-        AnyBuiltinSolver::Naive(NaiveSolver::build(&wl).expect("could not build naive solver"));
-    // we don't insert the solution yet,
-    // pretend that a user inputs guesses manually
-    let mut game = Game::build(5, false, 6, &wl, false)?;
-    let _actual_solution: Option<WordData> = Some(("nines".into(), 0.002));
-    let mut next_guess: Word;
-
-    next_guess = sl.guess_for(&game)?;
-    assert_eq!(next_guess, Word::from("which"));
-    game.guess(
-        &next_guess.clone(),
-        Some(Evaluation::build(&next_guess, "xxfxx")?),
-    )?;
-
-    next_guess = sl.guess_for(&game)?;
-    assert_eq!(next_guess, Word::from("first"));
-    game.guess(
-        &next_guess.clone(),
-        Some(Evaluation::build(&next_guess, "xcxfx")?),
-    )?;
-
-    next_guess = sl.guess_for(&game)?;
-    assert_eq!(next_guess, Word::from("lives"));
-    game.guess(
-        &next_guess.clone(),
-        Some(Evaluation::build(&next_guess, "xcxcc")?),
-    )?;
-
-    next_guess = sl.guess_for(&game)?;
-    assert_eq!(next_guess, Word::from("sides"));
-    game.guess(
-        &next_guess.clone(),
-        Some(Evaluation::build(&next_guess, "xcxcc")?),
-    )?;
-
-    next_guess = sl.guess_for(&game)?;
-    assert_eq!(next_guess, Word::from("mines"));
-    game.guess(
-        &next_guess.clone(),
-        Some(Evaluation::build(&next_guess, "xcccc")?),
-    )?;
-
-    next_guess = sl.guess_for(&game)?;
-    assert_eq!(next_guess, Word::from("pines"));
-    game.guess(
-        &next_guess.clone(),
-        Some(Evaluation::build(&next_guess, "xcccc")?),
-    )?;
-
-    next_guess = sl.guess_for(&game)?;
-    assert_eq!(next_guess, Word::from("nines"));
-    game.guess(
-        &next_guess.clone(),
-        Some(Evaluation::build(&next_guess, "ccccc")?),
-    )?;
-
-    assert!(game.finished());
-    assert!(game.won());
-
-    Ok(())
-}
-
-#[test]
-fn test_naive_win_games() -> anyhow::Result<()> {
-    let wl = wordlist();
-    let sl =
-        AnyBuiltinSolver::Naive(NaiveSolver::build(&wl).expect("could not build naive solver"));
-    let builder = Game::builder(&wl);
-
-    { 0..50 }.into_par_iter().for_each(|_round| {
-        let mut game = builder.build().expect("could not make game");
-        sl.play(&mut game).expect("could not play game");
-        assert!(game.finished());
-        assert!(game.won());
-    });
-    Ok(())
-}