diff --git a/milli/src/heed_codec/facet/new/mod.rs b/milli/src/heed_codec/facet/new/mod.rs
index 5ed6a61f6..04a545564 100644
--- a/milli/src/heed_codec/facet/new/mod.rs
+++ b/milli/src/heed_codec/facet/new/mod.rs
@@ -1,6 +1,9 @@
+use std::borrow::Cow;
+use std::convert::TryFrom;
+use std::marker::PhantomData;
+
 use heed::{BytesDecode, BytesEncode};
 use roaring::RoaringBitmap;
-use std::{borrow::Cow, convert::TryFrom, marker::PhantomData};
 
 pub mod ordered_f64_codec;
 pub mod str_ref;
diff --git a/milli/src/heed_codec/facet/new/ordered_f64_codec.rs b/milli/src/heed_codec/facet/new/ordered_f64_codec.rs
index 856a9c0d1..5ac9ffcfc 100644
--- a/milli/src/heed_codec/facet/new/ordered_f64_codec.rs
+++ b/milli/src/heed_codec/facet/new/ordered_f64_codec.rs
@@ -1,4 +1,5 @@
-use std::{borrow::Cow, convert::TryInto};
+use std::borrow::Cow;
+use std::convert::TryInto;
 
 use heed::BytesDecode;
 
diff --git a/milli/src/search/facet/facet_distribution_iter.rs b/milli/src/search/facet/facet_distribution_iter.rs
index 9e251103c..13ba28019 100644
--- a/milli/src/search/facet/facet_distribution_iter.rs
+++ b/milli/src/search/facet/facet_distribution_iter.rs
@@ -1,9 +1,10 @@
-use crate::heed_codec::facet::new::{FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice};
-use heed::Result;
-use roaring::RoaringBitmap;
 use std::ops::ControlFlow;
 
+use heed::Result;
+use roaring::RoaringBitmap;
+
 use super::{get_first_facet_value, get_highest_level};
+use crate::heed_codec::facet::new::{FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice};
 
 pub fn iterate_over_facet_distribution<'t, CB>(
     rtxn: &'t heed::RoTxn<'t>,
@@ -108,16 +109,16 @@ where
 
 #[cfg(test)]
 mod tests {
-    use crate::milli_snap;
-    use crate::{
-        heed_codec::facet::new::ordered_f64_codec::OrderedF64Codec, search::facet::test::FacetIndex,
-    };
+    use std::ops::ControlFlow;
+
     use heed::BytesDecode;
     use rand::{Rng, SeedableRng};
     use roaring::RoaringBitmap;
-    use std::ops::ControlFlow;
 
     use super::iterate_over_facet_distribution;
+    use crate::heed_codec::facet::new::ordered_f64_codec::OrderedF64Codec;
+    use crate::milli_snap;
+    use crate::search::facet::test::FacetIndex;
 
     fn get_simple_index() -> FacetIndex<OrderedF64Codec> {
         let index = FacetIndex::<OrderedF64Codec>::new(4, 8);
diff --git a/milli/src/search/facet/facet_range_search.rs b/milli/src/search/facet/facet_range_search.rs
index 38c6acdec..20ad23a37 100644
--- a/milli/src/search/facet/facet_range_search.rs
+++ b/milli/src/search/facet/facet_range_search.rs
@@ -1,18 +1,12 @@
+use std::ops::{Bound, RangeBounds};
+
 use heed::BytesEncode;
 use roaring::RoaringBitmap;
-use std::ops::Bound;
-use std::ops::RangeBounds;
 
-use crate::heed_codec::facet::new::FacetGroupValueCodec;
-use crate::heed_codec::facet::new::FacetKey;
-use crate::heed_codec::facet::new::FacetKeyCodec;
-use crate::heed_codec::facet::new::MyByteSlice;
+use super::{get_first_facet_value, get_highest_level, get_last_facet_value};
+use crate::heed_codec::facet::new::{FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice};
 use crate::Result;
 
-use super::get_first_facet_value;
-use super::get_highest_level;
-use super::get_last_facet_value;
-
 pub fn find_docids_of_facet_within_bounds<'t, BoundCodec>(
     rtxn: &'t heed::RoTxn<'t>,
     db: heed::Database<FacetKeyCodec<BoundCodec>, FacetGroupValueCodec>,
@@ -258,17 +252,17 @@ impl<'t, 'b, 'bitmap> FacetRangeSearch<'t, 'b, 'bitmap> {
 
 #[cfg(test)]
 mod tests {
-    use crate::milli_snap;
-    use crate::{
-        heed_codec::facet::new::{ordered_f64_codec::OrderedF64Codec, FacetKeyCodec},
-        search::facet::test::FacetIndex,
-        snapshot_tests::display_bitmap,
-    };
-    use rand::{Rng, SeedableRng};
-    use roaring::RoaringBitmap;
     use std::ops::Bound;
 
+    use rand::{Rng, SeedableRng};
+    use roaring::RoaringBitmap;
+
     use super::find_docids_of_facet_within_bounds;
+    use crate::heed_codec::facet::new::ordered_f64_codec::OrderedF64Codec;
+    use crate::heed_codec::facet::new::FacetKeyCodec;
+    use crate::milli_snap;
+    use crate::search::facet::test::FacetIndex;
+    use crate::snapshot_tests::display_bitmap;
 
     fn get_simple_index() -> FacetIndex<OrderedF64Codec> {
         let index = FacetIndex::<OrderedF64Codec>::new(4, 8);
diff --git a/milli/src/search/facet/facet_sort_ascending.rs b/milli/src/search/facet/facet_sort_ascending.rs
index e8618c302..b3cae5d28 100644
--- a/milli/src/search/facet/facet_sort_ascending.rs
+++ b/milli/src/search/facet/facet_sort_ascending.rs
@@ -1,10 +1,10 @@
-use crate::heed_codec::facet::new::{
-    FacetGroupValue, FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice,
-};
 use heed::Result;
 use roaring::RoaringBitmap;
 
 use super::{get_first_facet_value, get_highest_level};
+use crate::heed_codec::facet::new::{
+    FacetGroupValue, FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice,
+};
 
 pub fn ascending_facet_sort<'t>(
     rtxn: &'t heed::RoTxn<'t>,
@@ -83,16 +83,15 @@ impl<'t, 'e> Iterator for AscendingFacetSort<'t, 'e> {
 
 #[cfg(test)]
 mod tests {
-    use crate::milli_snap;
-    use crate::{
-        heed_codec::facet::new::ordered_f64_codec::OrderedF64Codec,
-        search::facet::{facet_sort_ascending::ascending_facet_sort, test::FacetIndex},
-        snapshot_tests::display_bitmap,
-    };
-    use rand::Rng;
-    use rand::SeedableRng;
+    use rand::{Rng, SeedableRng};
     use roaring::RoaringBitmap;
 
+    use crate::heed_codec::facet::new::ordered_f64_codec::OrderedF64Codec;
+    use crate::milli_snap;
+    use crate::search::facet::facet_sort_ascending::ascending_facet_sort;
+    use crate::search::facet::test::FacetIndex;
+    use crate::snapshot_tests::display_bitmap;
+
     fn get_simple_index() -> FacetIndex<OrderedF64Codec> {
         let index = FacetIndex::<OrderedF64Codec>::new(4, 8);
         let mut txn = index.env.write_txn().unwrap();
diff --git a/milli/src/search/facet/facet_sort_descending.rs b/milli/src/search/facet/facet_sort_descending.rs
index b8bae2f9d..d68c9bdad 100644
--- a/milli/src/search/facet/facet_sort_descending.rs
+++ b/milli/src/search/facet/facet_sort_descending.rs
@@ -1,12 +1,12 @@
 use std::ops::Bound;
 
-use crate::heed_codec::facet::new::{
-    FacetGroupValue, FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice,
-};
 use heed::Result;
 use roaring::RoaringBitmap;
 
 use super::{get_first_facet_value, get_highest_level, get_last_facet_value};
+use crate::heed_codec::facet::new::{
+    FacetGroupValue, FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice,
+};
 
 pub fn descending_facet_sort<'t>(
     rtxn: &'t heed::RoTxn<'t>,
@@ -111,16 +111,16 @@ impl<'t> Iterator for DescendingFacetSort<'t> {
 
 #[cfg(test)]
 mod tests {
-    use crate::milli_snap;
-    use crate::{
-        heed_codec::facet::new::{ordered_f64_codec::OrderedF64Codec, FacetKeyCodec, MyByteSlice},
-        search::facet::{facet_sort_descending::descending_facet_sort, test::FacetIndex},
-        snapshot_tests::display_bitmap,
-    };
-    use rand::Rng;
-    use rand::SeedableRng;
+    use rand::{Rng, SeedableRng};
     use roaring::RoaringBitmap;
 
+    use crate::heed_codec::facet::new::ordered_f64_codec::OrderedF64Codec;
+    use crate::heed_codec::facet::new::{FacetKeyCodec, MyByteSlice};
+    use crate::milli_snap;
+    use crate::search::facet::facet_sort_descending::descending_facet_sort;
+    use crate::search::facet::test::FacetIndex;
+    use crate::snapshot_tests::display_bitmap;
+
     fn get_simple_index() -> FacetIndex<OrderedF64Codec> {
         let index = FacetIndex::<OrderedF64Codec>::new(4, 8);
         let mut txn = index.env.write_txn().unwrap();
diff --git a/milli/src/search/facet/filter.rs b/milli/src/search/facet/filter.rs
index 6ec626a5c..6a10b7097 100644
--- a/milli/src/search/facet/filter.rs
+++ b/milli/src/search/facet/filter.rs
@@ -1,18 +1,18 @@
-use either::Either;
-pub use filter_parser::{Condition, Error as FPError, FilterCondition, Span, Token};
-use heed::types::DecodeIgnore;
-use roaring::RoaringBitmap;
 use std::collections::HashSet;
 use std::fmt::{Debug, Display};
 use std::ops::Bound::{self, Excluded, Included};
 
+use either::Either;
+pub use filter_parser::{Condition, Error as FPError, FilterCondition, Span, Token};
+use heed::types::DecodeIgnore;
+use roaring::RoaringBitmap;
+
+use super::facet_range_search;
 use crate::error::{Error, UserError};
 use crate::heed_codec::facet::new::ordered_f64_codec::OrderedF64Codec;
 use crate::heed_codec::facet::new::{FacetGroupValueCodec, FacetKey, FacetKeyCodec};
 use crate::{distance_between_two_points, lat_lng_to_xyz, FieldId, Index, Result};
 
-use super::facet_range_search;
-
 /// The maximum number of filters the filter AST can process.
 const MAX_FILTER_DEPTH: usize = 2000;
 
diff --git a/milli/src/search/facet/mod.rs b/milli/src/search/facet/mod.rs
index 42c0f065a..78cd8fd4b 100644
--- a/milli/src/search/facet/mod.rs
+++ b/milli/src/search/facet/mod.rs
@@ -1,10 +1,9 @@
 use heed::types::ByteSlice;
 use heed::{BytesDecode, RoTxn};
 
-use crate::heed_codec::facet::new::{FacetGroupValueCodec, FacetKeyCodec, MyByteSlice};
-
 pub use self::facet_distribution::{FacetDistribution, DEFAULT_VALUES_PER_FACET};
 pub use self::filter::Filter;
+use crate::heed_codec::facet::new::{FacetGroupValueCodec, FacetKeyCodec, MyByteSlice};
 
 mod facet_distribution;
 mod facet_distribution_iter;
@@ -78,17 +77,18 @@ pub(crate) fn get_highest_level<'t>(
 
 #[cfg(test)]
 pub mod test {
-    use crate::update::FacetsUpdateIncremental;
+    use std::fmt::Display;
+    use std::marker::PhantomData;
+    use std::rc::Rc;
+
     use heed::{BytesDecode, BytesEncode, Env, RwTxn};
     use roaring::RoaringBitmap;
-    use std::{fmt::Display, marker::PhantomData, rc::Rc};
 
-    use crate::{
-        heed_codec::facet::new::{
-            FacetGroupValue, FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice,
-        },
-        snapshot_tests::display_bitmap,
+    use crate::heed_codec::facet::new::{
+        FacetGroupValue, FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice,
     };
+    use crate::snapshot_tests::display_bitmap;
+    use crate::update::FacetsUpdateIncremental;
 
     pub struct FacetIndex<BoundCodec>
     where
diff --git a/milli/src/snapshot_tests.rs b/milli/src/snapshot_tests.rs
index f35bda2e7..d054e63b5 100644
--- a/milli/src/snapshot_tests.rs
+++ b/milli/src/snapshot_tests.rs
@@ -1,10 +1,12 @@
-use crate::heed_codec::facet::new::{FacetGroupValue, FacetKey};
-use crate::{make_db_snap_from_iter, ExternalDocumentsIds, Index};
-use roaring::RoaringBitmap;
 use std::borrow::Cow;
 use std::fmt::Write;
 use std::path::Path;
 
+use roaring::RoaringBitmap;
+
+use crate::heed_codec::facet::new::{FacetGroupValue, FacetKey};
+use crate::{make_db_snap_from_iter, ExternalDocumentsIds, Index};
+
 #[track_caller]
 pub fn default_db_snapshot_settings_for_test(name: Option<&str>) -> (insta::Settings, String) {
     let mut settings = insta::Settings::clone_current();
diff --git a/milli/src/update/facet/bulk.rs b/milli/src/update/facet/bulk.rs
index b8acffbaf..f93ee735e 100644
--- a/milli/src/update/facet/bulk.rs
+++ b/milli/src/update/facet/bulk.rs
@@ -1,3 +1,14 @@
+use std::cmp;
+use std::fs::File;
+use std::num::NonZeroUsize;
+
+use grenad::CompressionType;
+use heed::types::ByteSlice;
+use heed::{BytesEncode, Error, RoTxn};
+use log::debug;
+use roaring::RoaringBitmap;
+use time::OffsetDateTime;
+
 use crate::error::InternalError;
 use crate::facet::FacetType;
 use crate::heed_codec::facet::new::{
@@ -5,15 +16,6 @@ use crate::heed_codec::facet::new::{
 };
 use crate::update::index_documents::{create_writer, write_into_lmdb_database, writer_into_reader};
 use crate::{FieldId, Index, Result};
-use grenad::CompressionType;
-use heed::types::ByteSlice;
-use heed::{BytesEncode, Error, RoTxn};
-use log::debug;
-use roaring::RoaringBitmap;
-use std::cmp;
-use std::fs::File;
-use std::num::NonZeroUsize;
-use time::OffsetDateTime;
 
 pub struct FacetsUpdateBulk<'i> {
     index: &'i Index,
diff --git a/milli/src/update/facet/incremental.rs b/milli/src/update/facet/incremental.rs
index 712d7271c..3493db0f7 100644
--- a/milli/src/update/facet/incremental.rs
+++ b/milli/src/update/facet/incremental.rs
@@ -1,11 +1,12 @@
+use heed::types::ByteSlice;
+use heed::{BytesDecode, Error, RoTxn, RwTxn};
+use roaring::RoaringBitmap;
+
 use crate::heed_codec::facet::new::{
     FacetGroupValue, FacetGroupValueCodec, FacetKey, FacetKeyCodec, MyByteSlice,
 };
 use crate::search::facet::get_highest_level;
 use crate::Result;
-use heed::Error;
-use heed::{types::ByteSlice, BytesDecode, RoTxn, RwTxn};
-use roaring::RoaringBitmap;
 
 enum InsertionResult {
     InPlace,
@@ -462,19 +463,19 @@ impl FacetsUpdateIncremental {
 
 #[cfg(test)]
 mod tests {
-    use crate::milli_snap;
-    use crate::{
-        heed_codec::facet::new::{
-            ordered_f64_codec::OrderedF64Codec, str_ref::StrRefCodec, FacetGroupValueCodec,
-            FacetKeyCodec, MyByteSlice,
-        },
-        search::facet::{get_highest_level, test::FacetIndex},
-    };
-    use heed::{types::ByteSlice, BytesDecode, BytesEncode};
-    use rand::Rng;
-    use rand::{seq::SliceRandom, SeedableRng};
+    use heed::types::ByteSlice;
+    use heed::{BytesDecode, BytesEncode};
+    use rand::seq::SliceRandom;
+    use rand::{Rng, SeedableRng};
     use roaring::RoaringBitmap;
 
+    use crate::heed_codec::facet::new::ordered_f64_codec::OrderedF64Codec;
+    use crate::heed_codec::facet::new::str_ref::StrRefCodec;
+    use crate::heed_codec::facet::new::{FacetGroupValueCodec, FacetKeyCodec, MyByteSlice};
+    use crate::milli_snap;
+    use crate::search::facet::get_highest_level;
+    use crate::search::facet::test::FacetIndex;
+
     pub fn verify_structure_validity<C>(index: &FacetIndex<C>, field_id: u16)
     where
         for<'a> C: BytesDecode<'a> + BytesEncode<'a, EItem = <C as BytesDecode<'a>>::DItem>,
diff --git a/milli/src/update/index_documents/extract/extract_facet_string_docids.rs b/milli/src/update/index_documents/extract/extract_facet_string_docids.rs
index fe42801e7..591f44c74 100644
--- a/milli/src/update/index_documents/extract/extract_facet_string_docids.rs
+++ b/milli/src/update/index_documents/extract/extract_facet_string_docids.rs
@@ -1,11 +1,13 @@
+use std::fs::File;
+use std::io;
+
+use heed::BytesEncode;
+
 use super::helpers::{create_sorter, sorter_into_reader, try_split_array_at, GrenadParameters};
 use crate::heed_codec::facet::new::str_ref::StrRefCodec;
 use crate::heed_codec::facet::new::{FacetKey, FacetKeyCodec};
 use crate::update::index_documents::merge_cbo_roaring_bitmaps;
 use crate::{FieldId, Result};
-use heed::BytesEncode;
-use std::fs::File;
-use std::io;
 
 /// Extracts the facet string and the documents ids where this facet string appear.
 ///