diff --git a/nearby/crypto/crypto_provider/src/hkdf.rs b/nearby/crypto/crypto_provider/src/hkdf.rs
index dab4e13..c905302 100644
--- a/nearby/crypto/crypto_provider/src/hkdf.rs
+++ b/nearby/crypto/crypto_provider/src/hkdf.rs
@@ -33,3 +33,292 @@
 /// an invalid length
 #[derive(Debug)]
 pub struct InvalidLength;
+
+/// Test cases exported for testing specific hkdf implementations
+#[cfg(feature = "testing")]
+pub mod testing {
+    extern crate alloc;
+    use crate::hkdf::Hkdf;
+    pub use crate::testing::prelude::*;
+    use crate::CryptoProvider;
+    use alloc::vec;
+    use alloc::vec::Vec;
+    use core::iter;
+    use core::marker::PhantomData;
+    use hex_literal::hex;
+    use rstest_reuse::template;
+
+    /// Generates the test cases to validate the hkdf implementation.
+    /// For example, to test `MyCryptoProvider`:
+    ///
+    /// ```
+    /// mod tests {
+    ///     use std::marker::PhantomData;
+    ///     use crypto_provider::testing::CryptoProviderTestCase;
+    ///     #[apply(hkdf_test_cases)]
+    ///     fn hkdf_tests(testcase: CryptoProviderTestCase<MyCryptoProvider>){
+    ///         testcase(PhantomData::<MyCryptoProvider>);
+    ///     }
+    /// }
+    /// ```
+    #[template]
+    #[export]
+    #[rstest]
+    #[case::basic_test_hkdf(basic_test_hkdf)]
+    #[case::test_rfc5869_sha256(test_rfc5869_sha256)]
+    #[case::test_lengths(test_lengths)]
+    #[case::test_max_length(test_max_length)]
+    #[case::test_max_length_exceeded(test_max_length_exceeded)]
+    #[case::test_unsupported_length(test_unsupported_length)]
+    #[case::test_expand_multi_info(test_expand_multi_info)]
+    #[case::run_hkdf_sha256_vectors(run_hkdf_sha256_vectors)]
+    #[case::run_hkdf_sha512_vectors(run_hkdf_sha512_vectors)]
+    fn hkdf_test_cases<C: CryptoProvider>(#[case] testcase: CryptoProviderTestCase<C>) {}
+
+    const MAX_SHA256_LENGTH: usize = 255 * (256 / 8); // =8160
+
+    ///
+    pub struct Test<'a> {
+        ikm: &'a [u8],
+        salt: &'a [u8],
+        info: &'a [u8],
+        okm: &'a [u8],
+    }
+
+    /// data taken from sample code in Readme of crates.io page
+    pub fn basic_test_hkdf<C: CryptoProvider>(_: PhantomData<C>) {
+        let ikm = hex!("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b");
+        let salt = hex!("000102030405060708090a0b0c");
+        let info = hex!("f0f1f2f3f4f5f6f7f8f9");
+
+        let hk = C::HkdfSha256::new(Some(&salt[..]), &ikm);
+        let mut okm = [0u8; 42];
+        hk.expand(&info, &mut okm)
+            .expect("42 is a valid length for Sha256 to output");
+
+        let expected = hex!(
+            "
+        3cb25f25faacd57a90434f64d0362f2a
+        2d2d0a90cf1a5a4c5db02d56ecc4c5bf
+        34007208d5b887185865
+        "
+        );
+        assert_eq!(okm, expected);
+    }
+
+    // Test Vectors from https://tools.ietf.org/html/rfc5869.
+    #[rustfmt::skip]
+    ///
+    pub fn test_rfc5869_sha256<C: CryptoProvider>(_: PhantomData<C>) {
+        let tests = [
+            Test {
+                // Test Case 1
+                ikm: &hex!("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b"),
+                salt: &hex!("000102030405060708090a0b0c"),
+                info: &hex!("f0f1f2f3f4f5f6f7f8f9"),
+                okm: &hex!("
+                    3cb25f25faacd57a90434f64d0362f2a
+                    2d2d0a90cf1a5a4c5db02d56ecc4c5bf
+                    34007208d5b887185865
+                "),
+            },
+            Test {
+                // Test Case 2
+                ikm: &hex!("
+                    000102030405060708090a0b0c0d0e0f
+                    101112131415161718191a1b1c1d1e1f
+                    202122232425262728292a2b2c2d2e2f
+                    303132333435363738393a3b3c3d3e3f
+                    404142434445464748494a4b4c4d4e4f
+                "),
+                salt: &hex!("
+                    606162636465666768696a6b6c6d6e6f
+                    707172737475767778797a7b7c7d7e7f
+                    808182838485868788898a8b8c8d8e8f
+                    909192939495969798999a9b9c9d9e9f
+                    a0a1a2a3a4a5a6a7a8a9aaabacadaeaf
+                "),
+                info: &hex!("
+                    b0b1b2b3b4b5b6b7b8b9babbbcbdbebf
+                    c0c1c2c3c4c5c6c7c8c9cacbcccdcecf
+                    d0d1d2d3d4d5d6d7d8d9dadbdcdddedf
+                    e0e1e2e3e4e5e6e7e8e9eaebecedeeef
+                    f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff
+                "),
+                okm: &hex!("
+                    b11e398dc80327a1c8e7f78c596a4934
+                    4f012eda2d4efad8a050cc4c19afa97c
+                    59045a99cac7827271cb41c65e590e09
+                    da3275600c2f09b8367793a9aca3db71
+                    cc30c58179ec3e87c14c01d5c1f3434f
+                    1d87
+                "),
+            },
+            Test {
+                // Test Case 3
+                ikm: &hex!("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b"),
+                salt: &hex!(""),
+                info: &hex!(""),
+                okm: &hex!("
+                    8da4e775a563c18f715f802a063c5a31
+                    b8a11f5c5ee1879ec3454e5f3c738d2d
+                    9d201395faa4b61a96c8
+                "),
+            },
+        ];
+        for Test { ikm, salt, info, okm } in tests.iter() {
+            let salt = if salt.is_empty() {
+                None
+            } else {
+                Some(&salt[..])
+            };
+            let hkdf = C::HkdfSha256::new(salt, ikm);
+            let mut okm2 = vec![0u8; okm.len()];
+            assert!(hkdf.expand(&info[..], &mut okm2).is_ok());
+            assert_eq!(okm2[..], okm[..]);
+        }
+    }
+
+    ///
+    pub fn test_lengths<C: CryptoProvider>(_: PhantomData<C>) {
+        let hkdf = C::HkdfSha256::new(None, &[]);
+        let mut longest = vec![0u8; MAX_SHA256_LENGTH];
+        assert!(hkdf.expand(&[], &mut longest).is_ok());
+        // Runtime is O(length), so exhaustively testing all legal lengths
+        // would take too long (at least without --release). Only test a
+        // subset: the first 500, the last 10, and every 100th in between.
+        // 0 is an invalid key length for openssl, so start at 1
+        let lengths = (1..MAX_SHA256_LENGTH + 1)
+            .filter(|&len| !(500..=MAX_SHA256_LENGTH - 10).contains(&len) || len % 100 == 0);
+
+        for length in lengths {
+            let mut okm = vec![0u8; length];
+
+            assert!(hkdf.expand(&[], &mut okm).is_ok());
+            assert_eq!(okm.len(), length);
+            assert_eq!(okm[..], longest[..length]);
+        }
+    }
+
+    ///
+    pub fn test_max_length<C: CryptoProvider>(_: PhantomData<C>) {
+        let hkdf = C::HkdfSha256::new(Some(&[]), &[]);
+        let mut okm = vec![0u8; MAX_SHA256_LENGTH];
+        assert!(hkdf.expand(&[], &mut okm).is_ok());
+    }
+
+    ///
+    pub fn test_max_length_exceeded<C: CryptoProvider>(_: PhantomData<C>) {
+        let hkdf = C::HkdfSha256::new(Some(&[]), &[]);
+        let mut okm = vec![0u8; MAX_SHA256_LENGTH + 1];
+        assert!(hkdf.expand(&[], &mut okm).is_err());
+    }
+
+    ///
+    pub fn test_unsupported_length<C: CryptoProvider>(_: PhantomData<C>) {
+        let hkdf = C::HkdfSha256::new(Some(&[]), &[]);
+        let mut okm = vec![0u8; 90000];
+        assert!(hkdf.expand(&[], &mut okm).is_err());
+    }
+
+    ///
+    pub fn test_expand_multi_info<C: CryptoProvider>(_: PhantomData<C>) {
+        let info_components = &[
+            &b"09090909090909090909090909090909090909090909"[..],
+            &b"8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a"[..],
+            &b"0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0"[..],
+            &b"4c4c4c4c4c4c4c4c4c4c4c4c4c4c4c4c4c4c4"[..],
+            &b"1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d"[..],
+        ];
+
+        let hkdf = C::HkdfSha256::new(None, b"some ikm here");
+
+        // Compute HKDF-Expand on the concatenation of all the info components
+        let mut oneshot_res = [0u8; 16];
+        hkdf.expand(&info_components.concat(), &mut oneshot_res)
+            .unwrap();
+
+        // Now iteratively join the components of info_components until it's all 1 component. The value
+        // of HKDF-Expand should be the same throughout
+        let mut num_concatted = 0;
+        let mut info_head = Vec::new();
+
+        while num_concatted < info_components.len() {
+            info_head.extend(info_components[num_concatted]);
+
+            // Build the new input to be the info head followed by the remaining components
+            let input: Vec<&[u8]> = iter::once(info_head.as_slice())
+                .chain(info_components.iter().cloned().skip(num_concatted + 1))
+                .collect();
+
+            // Compute and compare to the one-shot answer
+            let mut multipart_res = [0u8; 16];
+            hkdf.expand_multi_info(&input, &mut multipart_res).unwrap();
+            assert_eq!(multipart_res, oneshot_res);
+            num_concatted += 1;
+        }
+    }
+
+    ///
+    pub fn run_hkdf_sha256_vectors<C: CryptoProvider>(_: PhantomData<C>) {
+        run_hkdf_test_vectors::<C::HkdfSha256>(HashAlg::Sha256)
+    }
+
+    ///
+    pub fn run_hkdf_sha512_vectors<C: CryptoProvider>(_: PhantomData<C>) {
+        run_hkdf_test_vectors::<C::HkdfSha512>(HashAlg::Sha512)
+    }
+
+    enum HashAlg {
+        Sha256,
+        Sha512,
+    }
+
+    ///
+    fn run_hkdf_test_vectors<K: Hkdf>(hash: HashAlg) {
+        let test_name = match hash {
+            HashAlg::Sha256 => wycheproof::hkdf::TestName::HkdfSha256,
+            HashAlg::Sha512 => wycheproof::hkdf::TestName::HkdfSha512,
+        };
+
+        let test_set =
+            wycheproof::hkdf::TestSet::load(test_name).expect("should be able to load test set");
+        for test_group in test_set.test_groups {
+            for test in test_group.tests {
+                let ikm = test.ikm;
+                let salt = test.salt;
+                let info = test.info;
+                let okm = test.okm;
+                let tc_id = test.tc_id;
+                if let Some(desc) = run_test::<K>(
+                    ikm.as_slice(),
+                    salt.as_slice(),
+                    info.as_slice(),
+                    okm.as_slice(),
+                ) {
+                    panic!(
+                        "\n\
+                         Failed test {tc_id}: {desc}\n\
+                         ikm:\t{ikm:?}\n\
+                         salt:\t{salt:?}\n\
+                         info:\t{info:?}\n\
+                         okm:\t{okm:?}\n"
+                    );
+                }
+            }
+        }
+    }
+
+    fn run_test<K: Hkdf>(ikm: &[u8], salt: &[u8], info: &[u8], okm: &[u8]) -> Option<&'static str> {
+        let prk = K::new(Some(salt), ikm);
+        let mut got_okm = vec![0; okm.len()];
+
+        if prk.expand(info, &mut got_okm).is_err() {
+            return Some("prk expand");
+        }
+        if got_okm != okm {
+            return Some("mismatch in okm");
+        }
+        None
+    }
+}
diff --git a/nearby/crypto/crypto_provider/src/hmac.rs b/nearby/crypto/crypto_provider/src/hmac.rs
index c5a9ae1..40be189 100644
--- a/nearby/crypto/crypto_provider/src/hmac.rs
+++ b/nearby/crypto/crypto_provider/src/hmac.rs
@@ -44,3 +44,125 @@
 /// Error output when the provided key material length is invalid
 #[derive(Debug)]
 pub struct InvalidLength;
+
+/// Test cases exported for testing specific hmac implementations
+#[cfg(feature = "testing")]
+pub mod testing {
+    use crate::hmac::Hmac;
+    use crate::rstest_reuse::template;
+    pub use crate::testing::prelude::*;
+    use crate::CryptoProvider;
+    use core::cmp::min;
+    use core::marker::PhantomData;
+    use wycheproof::TestResult;
+
+    /// Generates the test cases to validate the hmac implementation.
+    /// For example, to test `MyCryptoProvider`:
+    ///
+    /// ```
+    /// mod tests {
+    ///     use std::marker::PhantomData;
+    ///     use crypto_provider::testing::CryptoProviderTestCase;
+    ///     #[apply(hmac_test_cases)]
+    ///     fn hmac_tests(testcase: CryptoProviderTestCase<MyCryptoProvider>){
+    ///         testcase(PhantomData::<MyCryptoProvider>);
+    ///     }
+    /// }
+    /// ```
+    #[template]
+    #[export]
+    #[rstest]
+    #[case::hmac_sha256_test_vectors(hmac_sha256_test_vectors)]
+    #[case::hmac_sha512_test_vectors(hmac_sha512_test_vectors)]
+    fn hmac_test_cases<C: CryptoProvider>(#[case] testcase: CryptoProviderTestCase<C>) {}
+
+    /// Run wycheproof hmac sha256 test vectors on provided CryptoProvider
+    pub fn hmac_sha256_test_vectors<C: CryptoProvider>(_: PhantomData<C>) {
+        run_hmac_test_vectors::<32, C::HmacSha256>(HashAlg::Sha256)
+    }
+
+    /// Run wycheproof hmac sha512 test vectors on provided CryptoProvider
+    pub fn hmac_sha512_test_vectors<C: CryptoProvider>(_: PhantomData<C>) {
+        run_hmac_test_vectors::<64, C::HmacSha512>(HashAlg::Sha512)
+    }
+
+    enum HashAlg {
+        Sha256,
+        Sha512,
+    }
+
+    // Tests vectors from Project Wycheproof:
+    // https://github.com/google/wycheproof
+    fn run_hmac_test_vectors<const N: usize, H: Hmac<N>>(hash: HashAlg) {
+        let test_name = match hash {
+            HashAlg::Sha256 => wycheproof::mac::TestName::HmacSha256,
+            HashAlg::Sha512 => wycheproof::mac::TestName::HmacSha512,
+        };
+        let test_set =
+            wycheproof::mac::TestSet::load(test_name).expect("should be able to load test set");
+
+        for test_group in test_set.test_groups {
+            for test in test_group.tests {
+                let key = test.key;
+                let msg = test.msg;
+                let tag = test.tag;
+                let tc_id = test.tc_id;
+                let valid = match test.result {
+                    TestResult::Valid | TestResult::Acceptable => true,
+                    TestResult::Invalid => false,
+                };
+
+                if let Some(desc) =
+                    run_test::<N, H>(key.as_slice(), msg.as_slice(), tag.as_slice(), valid)
+                {
+                    panic!(
+                        "\n\
+                         Failed test {tc_id}: {desc}\n\
+                         key:\t{key:?}\n\
+                         msg:\t{msg:?}\n\
+                         tag:\t{tag:?}\n",
+                    );
+                }
+            }
+        }
+    }
+
+    fn run_test<const N: usize, H: Hmac<N>>(
+        key: &[u8],
+        input: &[u8],
+        tag: &[u8],
+        valid_data: bool,
+    ) -> Option<&'static str> {
+        let mut mac = H::new_from_slice(key).unwrap();
+        mac.update(input);
+        let result = mac.finalize();
+        let n = tag.len();
+        let result_bytes = &result[..n];
+
+        if valid_data {
+            if result_bytes != tag {
+                return Some("whole message");
+            }
+        } else {
+            return if result_bytes == tag {
+                Some("invalid should not match")
+            } else {
+                None
+            };
+        }
+
+        // test reading different chunk sizes
+        for chunk_size in 1..min(64, input.len()) {
+            let mut mac = H::new_from_slice(key).unwrap();
+            for chunk in input.chunks(chunk_size) {
+                mac.update(chunk);
+            }
+            let res = mac.verify_truncated_left(tag);
+            if res.is_err() {
+                return Some("chunked message");
+            }
+        }
+
+        None
+    }
+}
diff --git a/nearby/crypto/crypto_provider/src/lib.rs b/nearby/crypto/crypto_provider/src/lib.rs
index e9ce8b8..a61370c 100644
--- a/nearby/crypto/crypto_provider/src/lib.rs
+++ b/nearby/crypto/crypto_provider/src/lib.rs
@@ -46,11 +46,11 @@
 /// Uber crypto trait which defines the traits for all crypto primitives as associated types
 pub trait CryptoProvider: Clone + Debug + PartialEq + Eq + Send {
     /// The Hkdf type which implements the hkdf trait
-    type HkdfSha256: hkdf::Hkdf + Clone;
+    type HkdfSha256: hkdf::Hkdf;
     /// The Hmac type which implements the hmac trait
     type HmacSha256: hmac::Hmac<32>;
     /// The Hkdf type which implements the hkdf trait
-    type HkdfSha512: hkdf::Hkdf + Clone;
+    type HkdfSha512: hkdf::Hkdf;
     /// The Hmac type which implements the hmac trait
     type HmacSha512: hmac::Hmac<64>;
     /// The AES-CBC-PKCS7 implementation to use
diff --git a/nearby/crypto/crypto_provider/tests/hkdf_tests.rs b/nearby/crypto/crypto_provider/tests/hkdf_tests.rs
deleted file mode 100644
index 72d8dcc..0000000
--- a/nearby/crypto/crypto_provider/tests/hkdf_tests.rs
+++ /dev/null
@@ -1,345 +0,0 @@
-// Copyright 2022 Google LLC
-//
-// 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
-//
-//      http://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.
-
-/// Tests for both openssl and rust-crypto crypto_provider impls
-use crypto_provider::hkdf::Hkdf as _;
-use crypto_provider::CryptoProvider;
-use crypto_provider_openssl::Openssl;
-use crypto_provider_rustcrypto::RustCrypto;
-use hex_literal::hex;
-use std::iter;
-
-struct Test<'a> {
-    ikm: &'a [u8],
-    salt: &'a [u8],
-    info: &'a [u8],
-    okm: &'a [u8],
-}
-
-#[test]
-fn basic_test_rc() {
-    basic_test_hkdf::<RustCrypto>();
-}
-
-#[test]
-fn basic_test_openssl() {
-    basic_test_hkdf::<Openssl>();
-}
-
-/// data taken from sample code in Readme of crates.io page
-fn basic_test_hkdf<C: CryptoProvider>() {
-    let ikm = hex!("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b");
-    let salt = hex!("000102030405060708090a0b0c");
-    let info = hex!("f0f1f2f3f4f5f6f7f8f9");
-
-    let hk = C::HkdfSha256::new(Some(&salt[..]), &ikm);
-    let mut okm = [0u8; 42];
-    hk.expand(&info, &mut okm)
-        .expect("42 is a valid length for Sha256 to output");
-
-    let expected = hex!(
-        "
-        3cb25f25faacd57a90434f64d0362f2a
-        2d2d0a90cf1a5a4c5db02d56ecc4c5bf
-        34007208d5b887185865
-        "
-    );
-    assert_eq!(okm, expected);
-}
-
-#[test]
-fn rfc5869_sha256_rc() {
-    test_rfc5869_sha256::<RustCrypto>();
-}
-
-#[test]
-fn rfc5869_sha256_openssl() {
-    test_rfc5869_sha256::<Openssl>();
-}
-
-// Test Vectors from https://tools.ietf.org/html/rfc5869.
-#[rustfmt::skip]
-fn test_rfc5869_sha256<C: CryptoProvider>() {
-    let tests = [
-        Test {
-            // Test Case 1
-            ikm: &hex!("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b"),
-            salt: &hex!("000102030405060708090a0b0c"),
-            info: &hex!("f0f1f2f3f4f5f6f7f8f9"),
-            okm: &hex!("
-                3cb25f25faacd57a90434f64d0362f2a
-                2d2d0a90cf1a5a4c5db02d56ecc4c5bf
-                34007208d5b887185865
-            "),
-        },
-        Test {
-            // Test Case 2
-            ikm: &hex!("
-                000102030405060708090a0b0c0d0e0f
-                101112131415161718191a1b1c1d1e1f
-                202122232425262728292a2b2c2d2e2f
-                303132333435363738393a3b3c3d3e3f
-                404142434445464748494a4b4c4d4e4f
-            "),
-            salt: &hex!("
-                606162636465666768696a6b6c6d6e6f
-                707172737475767778797a7b7c7d7e7f
-                808182838485868788898a8b8c8d8e8f
-                909192939495969798999a9b9c9d9e9f
-                a0a1a2a3a4a5a6a7a8a9aaabacadaeaf
-            "),
-            info: &hex!("
-                b0b1b2b3b4b5b6b7b8b9babbbcbdbebf
-                c0c1c2c3c4c5c6c7c8c9cacbcccdcecf
-                d0d1d2d3d4d5d6d7d8d9dadbdcdddedf
-                e0e1e2e3e4e5e6e7e8e9eaebecedeeef
-                f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff
-            "),
-            okm: &hex!("
-                b11e398dc80327a1c8e7f78c596a4934
-                4f012eda2d4efad8a050cc4c19afa97c
-                59045a99cac7827271cb41c65e590e09
-                da3275600c2f09b8367793a9aca3db71
-                cc30c58179ec3e87c14c01d5c1f3434f
-                1d87
-            "),
-        },
-        Test {
-            // Test Case 3
-            ikm: &hex!("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b"),
-            salt: &hex!(""),
-            info: &hex!(""),
-            okm: &hex!("
-                8da4e775a563c18f715f802a063c5a31
-                b8a11f5c5ee1879ec3454e5f3c738d2d
-                9d201395faa4b61a96c8
-            "),
-        },
-    ];
-    for Test { ikm, salt, info, okm } in tests.iter() {
-        let salt = if salt.is_empty() {
-            None
-        } else {
-            Some(&salt[..])
-        };
-        let hkdf = C::HkdfSha256::new(salt, ikm);
-        let mut okm2 = vec![0u8; okm.len()];
-        assert!(hkdf.expand(&info[..], &mut okm2).is_ok());
-        assert_eq!(okm2[..], okm[..]);
-    }
-}
-
-const MAX_SHA256_LENGTH: usize = 255 * (256 / 8); // =8160
-
-#[test]
-fn lengths_rc() {
-    test_lengths::<RustCrypto>()
-}
-
-#[test]
-fn lengths_openssl() {
-    test_lengths::<Openssl>()
-}
-
-fn test_lengths<C: CryptoProvider>() {
-    let hkdf = C::HkdfSha256::new(None, &[]);
-    let mut longest = vec![0u8; MAX_SHA256_LENGTH];
-    assert!(hkdf.expand(&[], &mut longest).is_ok());
-    // Runtime is O(length), so exhaustively testing all legal lengths
-    // would take too long (at least without --release). Only test a
-    // subset: the first 500, the last 10, and every 100th in between.
-    // 0 is an invalid key length for openssl, so start at 1
-    let lengths = (1..MAX_SHA256_LENGTH + 1)
-        .filter(|&len| !(500..=MAX_SHA256_LENGTH - 10).contains(&len) || len % 100 == 0);
-
-    for length in lengths {
-        let mut okm = vec![0u8; length];
-
-        assert!(hkdf.expand(&[], &mut okm).is_ok());
-        assert_eq!(okm.len(), length);
-        assert_eq!(okm[..], longest[..length]);
-    }
-}
-
-#[test]
-fn max_length_rc() {
-    test_max_length::<RustCrypto>();
-}
-
-#[test]
-fn max_length_openssl() {
-    test_max_length::<Openssl>();
-}
-
-fn test_max_length<C: CryptoProvider>() {
-    let hkdf = C::HkdfSha256::new(Some(&[]), &[]);
-    let mut okm = vec![0u8; MAX_SHA256_LENGTH];
-    assert!(hkdf.expand(&[], &mut okm).is_ok());
-}
-
-#[test]
-fn max_length_exceeded_rc() {
-    test_max_length_exceeded::<RustCrypto>();
-}
-
-#[test]
-fn max_length_exceeded_openssl() {
-    test_max_length_exceeded::<Openssl>();
-}
-
-fn test_max_length_exceeded<C: CryptoProvider>() {
-    let hkdf = C::HkdfSha256::new(Some(&[]), &[]);
-    let mut okm = vec![0u8; MAX_SHA256_LENGTH + 1];
-    assert!(hkdf.expand(&[], &mut okm).is_err());
-}
-
-#[test]
-fn unsupported_length_rc() {
-    test_unsupported_length::<RustCrypto>();
-}
-
-#[test]
-fn unsupported_length_openssl() {
-    test_unsupported_length::<Openssl>();
-}
-
-fn test_unsupported_length<C: CryptoProvider>() {
-    let hkdf = C::HkdfSha256::new(Some(&[]), &[]);
-    let mut okm = vec![0u8; 90000];
-    assert!(hkdf.expand(&[], &mut okm).is_err());
-}
-
-#[test]
-fn expand_multi_info_rc() {
-    test_expand_multi_info::<RustCrypto>();
-}
-
-#[test]
-fn expand_multi_info_openssl() {
-    test_expand_multi_info::<Openssl>();
-}
-
-fn test_expand_multi_info<C: CryptoProvider>() {
-    let info_components = &[
-        &b"09090909090909090909090909090909090909090909"[..],
-        &b"8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a8a"[..],
-        &b"0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0"[..],
-        &b"4c4c4c4c4c4c4c4c4c4c4c4c4c4c4c4c4c4c4"[..],
-        &b"1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d"[..],
-    ];
-
-    let hkdf = C::HkdfSha256::new(None, b"some ikm here");
-
-    // Compute HKDF-Expand on the concatenation of all the info components
-    let mut oneshot_res = [0u8; 16];
-    hkdf.expand(&info_components.concat(), &mut oneshot_res)
-        .unwrap();
-
-    // Now iteratively join the components of info_components until it's all 1 component. The value
-    // of HKDF-Expand should be the same throughout
-    let mut num_concatted = 0;
-    let mut info_head = Vec::new();
-
-    while num_concatted < info_components.len() {
-        info_head.extend(info_components[num_concatted]);
-
-        // Build the new input to be the info head followed by the remaining components
-        let input: Vec<&[u8]> = iter::once(info_head.as_slice())
-            .chain(info_components.iter().cloned().skip(num_concatted + 1))
-            .collect();
-
-        // Compute and compare to the one-shot answer
-        let mut multipart_res = [0u8; 16];
-        hkdf.expand_multi_info(&input, &mut multipart_res).unwrap();
-        assert_eq!(multipart_res, oneshot_res);
-        num_concatted += 1;
-    }
-}
-
-#[test]
-fn hkdf_sha_256_wycheproof_test_vectors_rc() {
-    run_hkdf_test_vectors::<<RustCrypto as CryptoProvider>::HkdfSha256>(HashAlg::Sha256)
-}
-
-#[test]
-fn hkdf_sha_512_wycheproof_test_vectors_rc() {
-    run_hkdf_test_vectors::<<RustCrypto as CryptoProvider>::HkdfSha512>(HashAlg::Sha512)
-}
-
-#[test]
-fn hkdf_sha_256_wycheproof_test_vectors_openssl() {
-    run_hkdf_test_vectors::<<Openssl as CryptoProvider>::HkdfSha256>(HashAlg::Sha256)
-}
-
-#[test]
-fn hkdf_sha_512_wycheproof_test_vectors_openssl() {
-    run_hkdf_test_vectors::<<Openssl as CryptoProvider>::HkdfSha512>(HashAlg::Sha512)
-}
-
-enum HashAlg {
-    Sha256,
-    Sha512,
-}
-
-fn run_hkdf_test_vectors<K: crypto_provider::hkdf::Hkdf>(hash: HashAlg) {
-    let test_name = match hash {
-        HashAlg::Sha256 => wycheproof::hkdf::TestName::HkdfSha256,
-        HashAlg::Sha512 => wycheproof::hkdf::TestName::HkdfSha512,
-    };
-
-    let test_set =
-        wycheproof::hkdf::TestSet::load(test_name).expect("should be able to load test set");
-    for test_group in test_set.test_groups {
-        for test in test_group.tests {
-            let ikm = test.ikm;
-            let salt = test.salt;
-            let info = test.info;
-            let okm = test.okm;
-            let tc_id = test.tc_id;
-            if let Some(desc) = run_test::<K>(
-                ikm.as_slice(),
-                salt.as_slice(),
-                info.as_slice(),
-                okm.as_slice(),
-            ) {
-                panic!(
-                    "\n\
-                         Failed test {tc_id}: {desc}\n\
-                         ikm:\t{ikm:?}\n\
-                         salt:\t{salt:?}\n\
-                         info:\t{info:?}\n\
-                         okm:\t{okm:?}\n"
-                );
-            }
-        }
-    }
-}
-
-fn run_test<K: crypto_provider::hkdf::Hkdf>(
-    ikm: &[u8],
-    salt: &[u8],
-    info: &[u8],
-    okm: &[u8],
-) -> Option<&'static str> {
-    let prk = K::new(Some(salt), ikm);
-    let mut got_okm = vec![0; okm.len()];
-
-    if prk.expand(info, &mut got_okm).is_err() {
-        return Some("prk expand");
-    }
-    if got_okm != okm {
-        return Some("mismatch in okm");
-    }
-    None
-}
diff --git a/nearby/crypto/crypto_provider/tests/hmac_tests.rs b/nearby/crypto/crypto_provider/tests/hmac_tests.rs
deleted file mode 100644
index b7b64ee..0000000
--- a/nearby/crypto/crypto_provider/tests/hmac_tests.rs
+++ /dev/null
@@ -1,119 +0,0 @@
-// Copyright 2023 Google LLC
-//
-// 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
-//
-//     http://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.
-
-use core::cmp::min;
-use crypto_provider::CryptoProvider;
-use crypto_provider_openssl::Openssl;
-use crypto_provider_rustcrypto::RustCrypto;
-use wycheproof::TestResult;
-
-#[test]
-fn hmac_sha_256_wycheproof_test_vectors_rustcrypto() {
-    run_hmac_test_vectors::<32, <RustCrypto as CryptoProvider>::HmacSha256>(HashAlg::Sha256)
-}
-
-#[test]
-fn hmac_sha_256_wycheproof_test_vectors_openssl() {
-    run_hmac_test_vectors::<32, <Openssl as CryptoProvider>::HmacSha256>(HashAlg::Sha256)
-}
-
-#[test]
-fn hmac_sha_512_wycheproof_test_vectors_rustcrypto() {
-    run_hmac_test_vectors::<64, <RustCrypto as CryptoProvider>::HmacSha512>(HashAlg::Sha512)
-}
-
-#[test]
-fn hmac_sha_512_wycheproof_test_vectors_openssl() {
-    run_hmac_test_vectors::<64, <Openssl as CryptoProvider>::HmacSha512>(HashAlg::Sha512)
-}
-
-enum HashAlg {
-    Sha256,
-    Sha512,
-}
-
-// Tests vectors from Project Wycheproof:
-// https://github.com/google/wycheproof
-fn run_hmac_test_vectors<const N: usize, H: crypto_provider::hmac::Hmac<N>>(hash: HashAlg) {
-    let test_name = match hash {
-        HashAlg::Sha256 => wycheproof::mac::TestName::HmacSha256,
-        HashAlg::Sha512 => wycheproof::mac::TestName::HmacSha512,
-    };
-    let test_set =
-        wycheproof::mac::TestSet::load(test_name).expect("should be able to load test set");
-
-    for test_group in test_set.test_groups {
-        for test in test_group.tests {
-            let key = test.key;
-            let msg = test.msg;
-            let tag = test.tag;
-            let tc_id = test.tc_id;
-            let valid = match test.result {
-                TestResult::Valid | TestResult::Acceptable => true,
-                TestResult::Invalid => false,
-            };
-
-            if let Some(desc) =
-                run_test::<N, H>(key.as_slice(), msg.as_slice(), tag.as_slice(), valid)
-            {
-                panic!(
-                    "\n\
-                         Failed test {tc_id}: {desc}\n\
-                         key:\t{key:?}\n\
-                         msg:\t{msg:?}\n\
-                         tag:\t{tag:?}\n",
-                );
-            }
-        }
-    }
-}
-
-fn run_test<const N: usize, H: crypto_provider::hmac::Hmac<N>>(
-    key: &[u8],
-    input: &[u8],
-    tag: &[u8],
-    valid_data: bool,
-) -> Option<&'static str> {
-    let mut mac = H::new_from_slice(key).unwrap();
-    mac.update(input);
-    let result = mac.finalize();
-    let n = tag.len();
-    let result_bytes = &result[..n];
-
-    if valid_data {
-        if result_bytes != tag {
-            return Some("whole message");
-        }
-    } else {
-        return if result_bytes == tag {
-            Some("invalid should not match")
-        } else {
-            None
-        };
-    }
-
-    // test reading different chunk sizes
-    for chunk_size in 1..min(64, input.len()) {
-        let mut mac = H::new_from_slice(key).unwrap();
-        for chunk in input.chunks(chunk_size) {
-            mac.update(chunk);
-        }
-        let res = mac.verify_truncated_left(tag);
-        if res.is_err() {
-            return Some("chunked message");
-        }
-    }
-
-    None
-}