diff --git a/Cargo.toml b/Cargo.toml
index 030f97a..9505287 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,9 +20,9 @@ once_cell = "1.12.0"
 num_cpus = "1.13.1"
 ultraviolet = "0.9.0"
 crossbeam = "0.8.1"
+rand = "0.8.5"
 
 [dev-dependencies]
-rand = "0.8.5"
 wide = "0.7.4"
 
 [profile.dev]
diff --git a/README.md b/README.md
index bef232f..1d261bd 100644
--- a/README.md
+++ b/README.md
@@ -96,5 +96,5 @@ Take a look at [benchmarks](benches) for numbers.
 
 Take a look at 
 * [examples/simple.rs](examples/simple.rs) for an idea of simple usage.
-* [examples/tracking.rs](examples/track_merge.rs) for an idea of intra-cam track merging.
+* [examples/tracking.rs](examples/track_merging) for an idea of intra-cam track merging.
 
diff --git a/examples/track_merge.rs b/examples/track_merging.rs
similarity index 94%
rename from examples/track_merge.rs
rename to examples/track_merging.rs
index 7739bd8..a6f9d4d 100644
--- a/examples/track_merge.rs
+++ b/examples/track_merging.rs
@@ -2,13 +2,10 @@ use crate::Gender::{Female, Male};
 use anyhow::Result;
 use itertools::Itertools;
 use once_cell::sync::OnceCell;
-use rand::distributions::Uniform;
-use rand::rngs::ThreadRng;
-use rand::Rng;
 use similari::current_time_ms;
 use similari::distance::euclidean;
 use similari::store::TrackStore;
-use similari::test_stuff::vec2;
+use similari::test_stuff::FeatGen2;
 use similari::track::notify::NoopNotifier;
 use similari::track::{
     Metric, ObservationSpec, ObservationsDb, TrackAttributes, TrackAttributesUpdate, TrackStatus,
@@ -186,39 +183,9 @@ fn cam_tracking_attributes_update_test() {
     assert!(update.apply(&mut attrs).is_err());
 }
 
-struct FeatGen2 {
-    x: f32,
-    y: f32,
-    gen: ThreadRng,
-    dist: Uniform<f32>,
-}
-
-impl FeatGen2 {
-    pub fn new(x: f32, y: f32, drift: f32) -> Self {
-        Self {
-            x,
-            y,
-            gen: rand::thread_rng(),
-            dist: Uniform::new(-drift, drift),
-        }
-    }
-}
-
-impl Iterator for FeatGen2 {
-    type Item = ObservationSpec<f32>;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        self.x += self.gen.sample(&self.dist);
-        self.y += self.gen.sample(&self.dist);
-        Some(ObservationSpec(
-            self.gen.sample(&self.dist) + 0.7,
-            vec2(self.x, self.y),
-        ))
-    }
-}
-
 #[test]
 fn feat_gen() {
+    use similari::test_stuff::FeatGen2;
     use std::ops::Sub;
     use ultraviolet::f32x8;
 
diff --git a/src/test_stuff.rs b/src/test_stuff.rs
index d7a4757..62e5339 100644
--- a/src/test_stuff.rs
+++ b/src/test_stuff.rs
@@ -5,6 +5,9 @@ use crate::track::{
     TrackAttributesUpdate, TrackStatus,
 };
 use anyhow::Result;
+use rand::distributions::Uniform;
+use rand::prelude::ThreadRng;
+use rand::Rng;
 use thiserror::Error;
 
 #[derive(Debug, Error)]
@@ -133,3 +136,34 @@ pub fn vec2(x: f32, y: f32) -> Observation {
 
 impl ObservationAttributes for f32 {}
 impl ObservationAttributes for () {}
+
+pub struct FeatGen2 {
+    x: f32,
+    y: f32,
+    gen: ThreadRng,
+    dist: Uniform<f32>,
+}
+
+impl FeatGen2 {
+    pub fn new(x: f32, y: f32, drift: f32) -> Self {
+        Self {
+            x,
+            y,
+            gen: rand::thread_rng(),
+            dist: Uniform::new(-drift, drift),
+        }
+    }
+}
+
+impl Iterator for FeatGen2 {
+    type Item = ObservationSpec<f32>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.x += self.gen.sample(&self.dist);
+        self.y += self.gen.sample(&self.dist);
+        Some(ObservationSpec(
+            self.gen.sample(&self.dist) + 0.7,
+            vec2(self.x, self.y),
+        ))
+    }
+}