diff --git a/all-is-cubes-base/src/lib.rs b/all-is-cubes-base/src/lib.rs
index 957c900db..29e817adf 100644
--- a/all-is-cubes-base/src/lib.rs
+++ b/all-is-cubes-base/src/lib.rs
@@ -10,7 +10,7 @@
     not(any(test, feature = "arbitrary")),
     warn(clippy::std_instead_of_core, clippy::std_instead_of_alloc)
 )]
-#![cfg_attr(not(feature = "std"), expect(clippy::arc_with_non_send_sync))]
+#![cfg_attr(not(feature = "std"), allow(clippy::arc_with_non_send_sync))]
 #![warn(clippy::missing_inline_in_public_items)]
 
 #[cfg(any(feature = "std", test))]
diff --git a/all-is-cubes-base/src/math.rs b/all-is-cubes-base/src/math.rs
index 511c26495..09414f489 100644
--- a/all-is-cubes-base/src/math.rs
+++ b/all-is-cubes-base/src/math.rs
@@ -117,18 +117,18 @@ macro_rules! notnan {
     };
 }
 
-#[cfg(not(feature = "std"))]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(dead_code, reason = "unclear why this warns even though it is needed")]
 /// Identical to [`num_traits::Euclid`] except that its signatures are compatible with
 /// `std` versions.
 ///
 /// Note: this code is duplicated between `all-is-cubes` and
 /// `all-is-cubes-base` so that it doesn't need to be public.
 pub(crate) trait Euclid {
-    #[allow(dead_code)]
     fn div_euclid(self, rhs: Self) -> Self;
     fn rem_euclid(self, rhs: Self) -> Self;
 }
-#[cfg(not(feature = "std"))]
+#[cfg(not(any(feature = "std", test)))]
 impl<T: num_traits::Euclid + Copy> Euclid for T {
     fn div_euclid(self, rhs: Self) -> Self {
         <T as num_traits::Euclid>::div_euclid(&self, &rhs)
diff --git a/all-is-cubes-base/src/raycast.rs b/all-is-cubes-base/src/raycast.rs
index 316167b31..b073b762b 100644
--- a/all-is-cubes-base/src/raycast.rs
+++ b/all-is-cubes-base/src/raycast.rs
@@ -1,12 +1,12 @@
 use euclid::Vector3D;
 
 /// Acts as polyfill for float methods
-#[cfg(not(feature = "std"))]
-#[allow(unused_imports)]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(unused_imports, reason = "unclear why this warns even though it is needed")]
 use num_traits::float::Float as _;
 
-#[cfg(not(feature = "std"))]
-#[allow(unused_imports)]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(unused_imports, reason = "unclear why this warns even though it is needed")]
 use crate::math::Euclid as _;
 use crate::math::{
     Axis, Cube, CubeFace, Face7, FreeCoordinate, FreePoint, FreeVector, GridAab, GridCoordinate,
diff --git a/all-is-cubes-desktop/src/bin/all-is-cubes/command_options.rs b/all-is-cubes-desktop/src/bin/all-is-cubes/command_options.rs
index 6a2216c10..1d7dea518 100644
--- a/all-is-cubes-desktop/src/bin/all-is-cubes/command_options.rs
+++ b/all-is-cubes-desktop/src/bin/all-is-cubes/command_options.rs
@@ -388,6 +388,7 @@ pub(crate) fn parse_universe_source(
 mod tests {
     use super::*;
     use all_is_cubes::euclid::size3;
+    #[allow(unused_imports)]
     use clap::error::{ContextValue, ErrorKind};
 
     fn parse(args: &[&str]) -> clap::error::Result<AicDesktopArgs> {
diff --git a/all-is-cubes/src/behavior.rs b/all-is-cubes/src/behavior.rs
index cb50713ec..2c9e2cb94 100644
--- a/all-is-cubes/src/behavior.rs
+++ b/all-is-cubes/src/behavior.rs
@@ -334,7 +334,11 @@ struct Key(u64);
 
 impl Key {
     fn new() -> Self {
-        #![allow(clippy::useless_conversion)] // useless on pointer_width=64
+        #![allow(
+            clippy::useless_conversion,
+            clippy::unnecessary_fallible_conversions,
+            reason = "depends on pointer width and atomic support"
+        )]
 
         use core::sync::atomic::{self, Ordering};
 
diff --git a/all-is-cubes/src/camera/graphics_options.rs b/all-is-cubes/src/camera/graphics_options.rs
index 42222057a..8ac7f67eb 100644
--- a/all-is-cubes/src/camera/graphics_options.rs
+++ b/all-is-cubes/src/camera/graphics_options.rs
@@ -18,9 +18,12 @@ use crate::{block::Block, space::Space};
 // (Due to crate splitting that can't be a doc-link.)
 #[doc = include_str!("../save/serde-warning.md")]
 #[derive(Clone, Eq, PartialEq)]
-#[expect(
-    clippy::unsafe_derive_deserialize,
-    reason = "false positive from notnan! macro"
+#[cfg_attr(
+    feature = "save",
+    expect(
+        clippy::unsafe_derive_deserialize,
+        reason = "false positive from notnan! macro"
+    )
 )]
 #[cfg_attr(feature = "save", derive(serde::Serialize, serde::Deserialize))]
 #[cfg_attr(feature = "save", serde(default))]
diff --git a/all-is-cubes/src/character/exposure.rs b/all-is-cubes/src/character/exposure.rs
index 6974bc6e0..bc7ce16e7 100644
--- a/all-is-cubes/src/character/exposure.rs
+++ b/all-is-cubes/src/character/exposure.rs
@@ -8,7 +8,7 @@ use euclid::{vec3, Point3D};
 use num_traits::float::Float as _;
 
 /// Acts as polyfill for float methods
-#[cfg(not(feature = "std"))]
+#[cfg(not(any(feature = "std", test)))]
 #[allow(unused_imports)]
 use crate::math::Euclid as _;
 
diff --git a/all-is-cubes/src/chunking.rs b/all-is-cubes/src/chunking.rs
index 0ce9dae1d..42f22b0ca 100644
--- a/all-is-cubes/src/chunking.rs
+++ b/all-is-cubes/src/chunking.rs
@@ -14,12 +14,12 @@ use std::sync::Mutex;
 use euclid::{Point3D, Vector3D};
 
 /// Acts as polyfill for float methods
-#[cfg(not(feature = "std"))]
-#[allow(unused_imports)]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(unused_imports, reason = "unclear why this warns even though it is needed")]
 use num_traits::float::FloatCore as _;
 
-#[cfg(not(feature = "std"))]
-#[allow(unused_imports)]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(unused_imports, reason = "unclear why this warns even though it is needed")]
 use crate::math::Euclid as _;
 use crate::math::{
     Cube, FreeCoordinate, FreePoint, GridAab, GridCoordinate, GridPoint, OctantMask,
diff --git a/all-is-cubes/src/math.rs b/all-is-cubes/src/math.rs
index cf635d5a0..07ecc66c9 100644
--- a/all-is-cubes/src/math.rs
+++ b/all-is-cubes/src/math.rs
@@ -28,7 +28,8 @@ pub use all_is_cubes_base::{notnan, rgb_const, rgba_const};
 #[doc = include_str!("save/serde-warning.md")]
 pub use all_is_cubes_base::math::GridAab;
 
-#[cfg(not(feature = "std"))]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(dead_code, reason = "unclear why this warns even though it is needed")]
 /// Identical to [`num_traits::Euclid`] except that its signatures are compatible with
 /// `std` versions.
 ///
@@ -38,7 +39,7 @@ pub(crate) trait Euclid {
     fn div_euclid(self, rhs: Self) -> Self;
     fn rem_euclid(self, rhs: Self) -> Self;
 }
-#[cfg(not(feature = "std"))]
+#[cfg(not(any(feature = "std", test)))]
 impl<T: num_traits::Euclid + Copy> Euclid for T {
     fn div_euclid(self, rhs: Self) -> Self {
         <T as num_traits::Euclid>::div_euclid(&self, &rhs)
diff --git a/all-is-cubes/src/physics/body.rs b/all-is-cubes/src/physics/body.rs
index 22d19fe5c..dee3ad89f 100644
--- a/all-is-cubes/src/physics/body.rs
+++ b/all-is-cubes/src/physics/body.rs
@@ -6,8 +6,8 @@ use euclid::Vector3D;
 use ordered_float::NotNan;
 
 /// Acts as polyfill for float methods
-#[cfg(not(feature = "std"))]
-#[allow(unused_imports)]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(unused_imports, reason = "unclear why this warns even though it is needed")]
 use num_traits::float::Float as _;
 
 use super::collision::{
@@ -16,8 +16,8 @@ use super::collision::{
 use crate::block::{BlockCollision, Resolution};
 use crate::camera::Eye;
 use crate::fluff::Fluff;
-#[cfg(not(feature = "std"))]
-#[allow(unused_imports)]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(unused_imports, reason = "unclear why this warns even though it is needed")]
 use crate::math::Euclid as _;
 use crate::math::{Aab, Cube, Face6, Face7, FreeCoordinate, FreePoint, FreeVector, Geometry as _};
 use crate::physics::{StopAt, Velocity, POSITION_EPSILON};
diff --git a/all-is-cubes/src/raytracer.rs b/all-is-cubes/src/raytracer.rs
index 2343d3346..71271fe7b 100644
--- a/all-is-cubes/src/raytracer.rs
+++ b/all-is-cubes/src/raytracer.rs
@@ -10,8 +10,11 @@ use core::marker::PhantomData;
 use euclid::{vec3, Vector3D};
 use manyfmt::Fmt;
 /// Acts as polyfill for float methods
-#[cfg(not(feature = "std"))]
-#[allow(unused_imports)]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(
+    unused_imports,
+    reason = "unclear why this warns even though it is needed"
+)]
 use num_traits::float::Float as _;
 use ordered_float::NotNan;
 
@@ -21,8 +24,11 @@ use rayon::iter::{IntoParallelIterator as _, ParallelIterator as _};
 use crate::block::{Evoxels, Resolution, AIR};
 use crate::camera::NdcPoint2;
 use crate::camera::{Camera, GraphicsOptions, TransparencyOption};
-#[cfg(not(feature = "std"))]
-#[allow(unused_imports)]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(
+    unused_imports,
+    reason = "unclear why this warns even though it is needed"
+)]
 use crate::math::Euclid as _;
 use crate::math::{
     rgb_const, smoothstep, Cube, Face6, Face7, FreeCoordinate, FreePoint, FreeVector, GridAab,
diff --git a/all-is-cubes/src/space/light/data.rs b/all-is-cubes/src/space/light/data.rs
index 8332184e2..8a031811c 100644
--- a/all-is-cubes/src/space/light/data.rs
+++ b/all-is-cubes/src/space/light/data.rs
@@ -5,7 +5,8 @@ use core::fmt;
 use euclid::default::Vector3D;
 
 /// Acts as polyfill for float methods
-#[cfg(not(feature = "std"))]
+#[cfg(not(any(feature = "std", test)))]
+#[allow(unused_imports, reason = "unclear why this warns even though it is needed")]
 use num_traits::float::Float as _;
 
 use crate::math::{NotNan, Rgb};
diff --git a/all-is-cubes/src/universe.rs b/all-is-cubes/src/universe.rs
index 9c557a6a4..c42e4099b 100644
--- a/all-is-cubes/src/universe.rs
+++ b/all-is-cubes/src/universe.rs
@@ -163,7 +163,11 @@ cfg_if::cfg_if! {
 
 impl UniverseId {
     fn new() -> Self {
-        #![allow(clippy::useless_conversion, reason = "useless on pointer_width=64")]
+        #![allow(
+            clippy::useless_conversion,
+            clippy::unnecessary_fallible_conversions,
+            reason = "depends on pointer width and atomic support"
+        )]
 
         let id = UNIVERSE_ID_COUNTER
             .fetch_update(Ordering::Relaxed, Ordering::Relaxed, |counter| {