diff --git a/tests/src/piet_tests.rs b/tests/src/piet_tests.rs
deleted file mode 100644
index 79cf4ec..0000000
--- a/tests/src/piet_tests.rs
+++ /dev/null
@@ -1,133 +0,0 @@
-// Copyright 2021 The piet-gpu authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Also licensed under MIT license, at your choice.
-
-//! Test for piet-gpu transform scan.
-
-use crate::{Config, Runner, TestResult};
-
-use kurbo::Affine;
-use piet_gpu::stages::{self, Transform, TransformCode, TransformStage};
-use piet_gpu_hal::BufferUsage;
-use rand::Rng;
-
-struct AffineTestData {
-    input_data: Vec<Transform>,
-    expected: Vec<Affine>,
-}
-
-pub unsafe fn transform_test(runner: &mut Runner, config: &Config) -> TestResult {
-    let mut result = TestResult::new("transform");
-    let n_elements: u64 = config.size.choose(1 << 12, 1 << 18, 1 << 24);
-    // TODO: would be nice to validate with real transform.
-    let data = AffineTestData::new(n_elements as usize);
-    let data_buf = runner
-        .session
-        .create_buffer_init(&data.input_data, BufferUsage::STORAGE)
-        .unwrap();
-    let memory = runner.buf_down(data_buf.size() + 24, BufferUsage::empty());
-    let stage_config = stages::Config {
-        n_trans: n_elements as u32,
-        // This is a hack to get elements aligned.
-        trans_alloc: 16,
-        ..Default::default()
-    };
-    let config_buf = runner
-        .session
-        .create_buffer_init(std::slice::from_ref(&stage_config), BufferUsage::STORAGE)
-        .unwrap();
-
-    let code = TransformCode::new(&runner.session);
-    let stage = TransformStage::new(&runner.session, &code);
-    let binding = stage.bind(
-        &runner.session,
-        &code,
-        &config_buf,
-        &data_buf,
-        &memory.dev_buf,
-    );
-    let mut total_elapsed = 0.0;
-    let n_iter = config.n_iter;
-    for i in 0..n_iter {
-        let mut commands = runner.commands();
-        commands.write_timestamp(0);
-        stage.record(&mut commands.cmd_buf, &code, &binding, n_elements);
-        commands.write_timestamp(1);
-        if i == 0 {
-            commands.cmd_buf.memory_barrier();
-            commands.download(&memory);
-        }
-        total_elapsed += runner.submit(commands);
-        if i == 0 || config.verify_all {
-            let mut dst: Vec<Transform> = Default::default();
-            memory.read(&mut dst);
-            if let Some(failure) = data.verify(&dst[1..]) {
-                result.fail(failure);
-            }
-        }
-    }
-    result.timing(total_elapsed, n_elements * n_iter);
-    result
-}
-
-impl AffineTestData {
-    fn new(n: usize) -> AffineTestData {
-        let mut rng = rand::thread_rng();
-        let mut a = Affine::default();
-        let mut b;
-        let mut input_data = Vec::with_capacity(n);
-        let mut expected = Vec::with_capacity(n);
-        for _ in 0..n {
-            loop {
-                b = Affine::new([
-                    rng.gen_range(-10.0, 10.0),
-                    rng.gen_range(-10.0, 10.0),
-                    rng.gen_range(-10.0, 10.0),
-                    rng.gen_range(-10.0, 10.0),
-                    rng.gen_range(-10.0, 10.0),
-                    rng.gen_range(-10.0, 10.0),
-                ]);
-                if b.determinant() >= 1.0 {
-                    break;
-                }
-            }
-            expected.push(b);
-            let c = a.inverse() * b;
-            input_data.push(Transform::from_kurbo(c));
-            a = b;
-        }
-        AffineTestData {
-            input_data,
-            expected,
-        }
-    }
-
-    fn verify(&self, actual: &[Transform]) -> Option<String> {
-        for (i, (actual, expected)) in actual.iter().zip(&self.expected).enumerate() {
-            let error: f64 = actual
-                .to_kurbo()
-                .as_coeffs()
-                .iter()
-                .zip(expected.as_coeffs())
-                .map(|(actual, expected)| (actual - expected).powi(2))
-                .sum();
-            let tolerance = 1e-6 * (i + 1) as f64;
-            if error > tolerance {
-                return Some(format!("{}: {} {}", i, error, tolerance));
-            }
-        }
-        None
-    }
-}
diff --git a/tests/src/util.rs b/tests/src/util.rs
deleted file mode 100644
index 473f601..0000000
--- a/tests/src/util.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2021 The piet-gpu authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Also licensed under MIT license, at your choice.
-
-pub fn align_size(size: u64, alignment: u64) -> u64 {
-    let tmp = size + alignment - 1;
-    tmp - tmp % alignment
-}