diff --git a/cargo-registry-index/lib.rs b/cargo-registry-index/lib.rs
index 55eb60a5442..0777a85fbe1 100644
--- a/cargo-registry-index/lib.rs
+++ b/cargo-registry-index/lib.rs
@@ -5,7 +5,7 @@ extern crate serde;
 pub mod testing;
 
 use anyhow::{anyhow, Context};
-use std::collections::HashMap;
+use std::collections::BTreeMap;
 use std::io::Write;
 use std::path::{Path, PathBuf};
 use std::process::Command;
@@ -101,7 +101,7 @@ pub struct Crate {
     pub vers: String,
     pub deps: Vec<Dependency>,
     pub cksum: String,
-    pub features: HashMap<String, Vec<String>>,
+    pub features: BTreeMap<String, Vec<String>>,
     /// This field contains features with new, extended syntax. Specifically,
     /// namespaced features (`dep:`) and weak dependencies (`pkg?/feat`).
     ///
@@ -112,7 +112,7 @@ pub struct Crate {
     /// will fail to load due to not being able to parse the new syntax, even
     /// with a `Cargo.lock` file.
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub features2: Option<HashMap<String, Vec<String>>>,
+    pub features2: Option<BTreeMap<String, Vec<String>>>,
     pub yanked: Option<bool>,
     #[serde(default)]
     pub links: Option<String>,
@@ -139,7 +139,7 @@ pub struct Crate {
     pub v: Option<u32>,
 }
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, PartialEq, PartialOrd, Ord, Eq)]
 pub struct Dependency {
     pub name: String,
     pub req: String,
@@ -152,7 +152,7 @@ pub struct Dependency {
     pub package: Option<String>,
 }
 
-#[derive(Copy, Clone, Serialize, Deserialize, Debug)]
+#[derive(Copy, Clone, Serialize, Deserialize, Debug, PartialEq, PartialOrd, Ord, Eq)]
 #[serde(rename_all = "lowercase")]
 pub enum DependencyKind {
     Normal,
diff --git a/src/controllers/krate/publish.rs b/src/controllers/krate/publish.rs
index be5f3ac9fdb..259de4366e0 100644
--- a/src/controllers/krate/publish.rs
+++ b/src/controllers/krate/publish.rs
@@ -3,7 +3,7 @@
 use flate2::read::GzDecoder;
 use hex::ToHex;
 use sha2::{Digest, Sha256};
-use std::collections::HashMap;
+use std::collections::BTreeMap;
 use std::io::Read;
 use std::path::Path;
 use std::sync::Arc;
@@ -216,7 +216,7 @@ pub fn publish(req: &mut dyn RequestExt) -> EndpointResult {
             .uploader()
             .upload_crate(app.http_client(), tarball, &krate, vers)?;
 
-        let (features, features2): (HashMap<_, _>, HashMap<_, _>) =
+        let (features, features2): (BTreeMap<_, _>, BTreeMap<_, _>) =
             features.into_iter().partition(|(_k, vals)| {
                 !vals
                     .iter()
diff --git a/src/downloads_counter.rs b/src/downloads_counter.rs
index 80309b8c328..145db8c7fca 100644
--- a/src/downloads_counter.rs
+++ b/src/downloads_counter.rs
@@ -247,7 +247,7 @@ mod tests {
     use crate::models::{Crate, NewCrate, NewUser, NewVersion, User};
     use diesel::PgConnection;
     use semver::Version;
-    use std::collections::HashMap;
+    use std::collections::BTreeMap;
 
     #[test]
     fn test_increment_and_persist_all() {
@@ -452,7 +452,7 @@ mod tests {
             let version = NewVersion::new(
                 self.krate.id,
                 &Version::parse(&format!("{}.0.0", self.next_version)).unwrap(),
-                &HashMap::new(),
+                &BTreeMap::new(),
                 None,
                 None,
                 0,
diff --git a/src/models/version.rs b/src/models/version.rs
index 72d9fd8dd0b..172bfb51f34 100644
--- a/src/models/version.rs
+++ b/src/models/version.rs
@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use std::collections::BTreeMap;
 
 use chrono::NaiveDateTime;
 use diesel::prelude::*;
@@ -127,7 +127,7 @@ impl NewVersion {
     pub fn new(
         crate_id: i32,
         num: &semver::Version,
-        features: &HashMap<String, Vec<String>>,
+        features: &BTreeMap<String, Vec<String>>,
         license: Option<String>,
         license_file: Option<&str>,
         crate_size: i32,
diff --git a/src/tests/builders/publish.rs b/src/tests/builders/publish.rs
index c6a596e64a0..d599b7117c9 100644
--- a/src/tests/builders/publish.rs
+++ b/src/tests/builders/publish.rs
@@ -1,5 +1,5 @@
 use cargo_registry::views::krate_publish as u;
-use std::{collections::HashMap, io::Read};
+use std::{collections::BTreeMap, collections::HashMap, io::Read};
 
 use flate2::{write::GzEncoder, Compression};
 use once_cell::sync::Lazy;
@@ -36,7 +36,7 @@ pub struct PublishBuilder {
     readme: Option<String>,
     tarball: Vec<u8>,
     version: semver::Version,
-    features: HashMap<u::EncodableFeatureName, Vec<u::EncodableFeature>>,
+    features: BTreeMap<u::EncodableFeatureName, Vec<u::EncodableFeature>>,
 }
 
 impl PublishBuilder {
@@ -56,7 +56,7 @@ impl PublishBuilder {
             readme: None,
             tarball: EMPTY_TARBALL_BYTES.to_vec(),
             version: semver::Version::parse("1.0.0").unwrap(),
-            features: HashMap::new(),
+            features: BTreeMap::new(),
         }
     }
 
diff --git a/src/tests/builders/version.rs b/src/tests/builders/version.rs
index 3c3f898aa11..78eadfaf678 100644
--- a/src/tests/builders/version.rs
+++ b/src/tests/builders/version.rs
@@ -3,7 +3,7 @@ use cargo_registry::{
     schema::{dependencies, versions},
     util::errors::AppResult,
 };
-use std::collections::HashMap;
+use std::collections::BTreeMap;
 
 use chrono::NaiveDateTime;
 use diesel::prelude::*;
@@ -12,7 +12,7 @@ use diesel::prelude::*;
 pub struct VersionBuilder<'a> {
     created_at: Option<NaiveDateTime>,
     dependencies: Vec<(i32, Option<&'static str>)>,
-    features: HashMap<String, Vec<String>>,
+    features: BTreeMap<String, Vec<String>>,
     license: Option<&'a str>,
     license_file: Option<&'a str>,
     num: semver::Version,
@@ -36,7 +36,7 @@ impl<'a> VersionBuilder<'a> {
         VersionBuilder {
             created_at: None,
             dependencies: Vec::new(),
-            features: HashMap::new(),
+            features: BTreeMap::new(),
             license: None,
             license_file: None,
             num,
diff --git a/src/tests/krate/publish.rs b/src/tests/krate/publish.rs
index 3146a651353..8103a563287 100644
--- a/src/tests/krate/publish.rs
+++ b/src/tests/krate/publish.rs
@@ -11,7 +11,7 @@ use diesel::{delete, update, ExpressionMethods, QueryDsl, RunQueryDsl};
 use flate2::write::GzEncoder;
 use flate2::Compression;
 use http::StatusCode;
-use std::collections::HashMap;
+use std::collections::{BTreeMap, HashMap};
 use std::io::Read;
 use std::iter::FromIterator;
 use std::time::Duration;
@@ -953,9 +953,9 @@ fn features_version_2() {
     assert_eq!(crates[0].name, "foo");
     assert_eq!(crates[0].deps.len(), 1);
     assert_eq!(crates[0].v, Some(2));
-    let features = HashMap::from_iter([("old_feat".to_string(), vec![])]);
+    let features = BTreeMap::from_iter([("old_feat".to_string(), vec![])]);
     assert_eq!(crates[0].features, features);
-    let features2 = HashMap::from_iter([(
+    let features2 = BTreeMap::from_iter([(
         "new_feat".to_string(),
         vec!["dep:bar".to_string(), "bar?/feat".to_string()],
     )]);
diff --git a/src/views/krate_publish.rs b/src/views/krate_publish.rs
index 5ff78f2731d..51d9ca6e809 100644
--- a/src/views/krate_publish.rs
+++ b/src/views/krate_publish.rs
@@ -2,7 +2,7 @@
 //! and manages the serialising and deserialising of this information
 //! to and from structs. The serlializing is only utilised in
 //! integration tests.
-use std::collections::HashMap;
+use std::collections::{BTreeMap, HashMap};
 
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
 
@@ -17,7 +17,7 @@ pub struct EncodableCrateUpload {
     pub name: EncodableCrateName,
     pub vers: EncodableCrateVersion,
     pub deps: Vec<EncodableCrateDependency>,
-    pub features: HashMap<EncodableFeatureName, Vec<EncodableFeature>>,
+    pub features: BTreeMap<EncodableFeatureName, Vec<EncodableFeature>>,
     pub description: Option<String>,
     pub homepage: Option<String>,
     pub documentation: Option<String>,
@@ -53,7 +53,7 @@ pub struct EncodableCategoryList(pub Vec<EncodableCategory>);
 pub struct EncodableCategory(pub String);
 #[derive(Serialize, Debug, Deref)]
 pub struct EncodableFeature(pub String);
-#[derive(PartialEq, Eq, Hash, Serialize, Debug, Deref)]
+#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Debug, Deref)]
 pub struct EncodableFeatureName(pub String);
 
 #[derive(Serialize, Deserialize, Debug)]
diff --git a/src/worker/update_downloads.rs b/src/worker/update_downloads.rs
index 44bf942775d..d4c4730208a 100644
--- a/src/worker/update_downloads.rs
+++ b/src/worker/update_downloads.rs
@@ -85,7 +85,7 @@ mod test {
     use super::*;
     use crate::email::Emails;
     use crate::models::{Crate, NewCrate, NewUser, NewVersion, User, Version};
-    use std::collections::HashMap;
+    use std::collections::BTreeMap;
 
     fn user(conn: &PgConnection) -> User {
         NewUser::new(2, "login", None, None, "access_token")
@@ -103,7 +103,7 @@ mod test {
         let version = NewVersion::new(
             krate.id,
             &semver::Version::parse("1.0.0").unwrap(),
-            &HashMap::new(),
+            &BTreeMap::new(),
             None,
             None,
             0,