diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 693c658536..4c4f28d380 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -69,7 +69,9 @@ jobs:
       - uses: actions/checkout@v4
       - name: MSRV
         if: ${{ matrix.variant == 'MSRV' }}
-        run: cp Cargo.lock.msrv Cargo.lock
+        run: |
+          cp Cargo.lock.msrv Cargo.lock
+          cp distr_test/Cargo.lock.msrv distr_test/Cargo.lock
       - name: Install toolchain
         uses: dtolnay/rust-toolchain@master
         with:
diff --git a/distr_test/Cargo.lock.msrv b/distr_test/Cargo.lock.msrv
new file mode 100644
index 0000000000..990c9c34a3
--- /dev/null
+++ b/distr_test/Cargo.lock.msrv
@@ -0,0 +1,449 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "approx"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cab112f0a86d568ea0e627cc1d6be74a1e9cd55214684db5561995f6dad897c6"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
+
+[[package]]
+name = "bytemuck"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8334215b81e418a0a7bdb8ef0849474f40bb10c8b71f1c4ed315cff49f32494d"
+
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
+[[package]]
+name = "cauchy"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ff11ddd2af3b5e80dd0297fee6e56ac038d9bdc549573cdb51bd6d2efe7f05e"
+dependencies = [
+ "num-complex",
+ "num-traits",
+ "rand 0.8.5",
+ "serde",
+]
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "distr_test"
+version = "0.1.0"
+dependencies = [
+ "libm",
+ "num-traits",
+ "rand 0.9.0-alpha.1",
+ "rand_distr 0.5.0-alpha.1",
+ "special",
+ "spfunc",
+ "statrs",
+]
+
+[[package]]
+name = "fast_polynomial"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62eea6ee590b08a5f8b1139f4d6caee195b646d0c07e4b1808fbd5c4dea4829a"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "lambert_w"
+version = "0.5.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd8852c2190439a46c77861aca230080cc9db4064be7f9de8ee81816d6c72c25"
+dependencies = [
+ "fast_polynomial",
+ "libm",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.162"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18d287de67fe55fd7e1581fe933d965a5a9477b38e949cfa9f8574ef01506398"
+
+[[package]]
+name = "libm"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bda4c6077b0b08da2c48b172195795498381a7c8988c9e6212a6c55c5b9bd70"
+
+[[package]]
+name = "matrixmultiply"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9380b911e3e96d10c1f415da0876389aaf1b56759054eeb0de7df940c456ba1a"
+dependencies = [
+ "autocfg",
+ "rawpointer",
+]
+
+[[package]]
+name = "nalgebra"
+version = "0.32.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b5c17de023a86f59ed79891b2e5d5a94c705dbe904a5b5c9c952ea6221b03e4"
+dependencies = [
+ "approx",
+ "matrixmultiply",
+ "nalgebra-macros",
+ "num-complex",
+ "num-rational",
+ "num-traits",
+ "rand 0.8.5",
+ "rand_distr 0.4.3",
+ "simba",
+ "typenum",
+]
+
+[[package]]
+name = "nalgebra-macros"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "254a5372af8fc138e36684761d3c0cdb758a4410e938babcff1c860ce14ddbfc"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "num-complex"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73f88a1307638156682bada9d7604135552957b7818057dcef22705b4d509495"
+dependencies = [
+ "num-traits",
+ "rand 0.8.5",
+ "serde",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f83d14da390562dca69fc84082e73e548e1ad308d24accdedd2720017cb37824"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+ "libm",
+]
+
+[[package]]
+name = "paste"
+version = "1.0.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77957b295656769bb8ad2b6a6b09d897d94f05c41b069aede1fcdaa675eaea04"
+dependencies = [
+ "zerocopy 0.7.35",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.89"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f139b0662de085916d1fb67d2b4169d1addddda1919e696f3252b740b629986e"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5b9d34b8991d19d98081b46eacdd8eb58c6f2b201139f7c5f643cc155a633af"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "libc",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand"
+version = "0.9.0-alpha.1"
+dependencies = [
+ "rand_chacha 0.9.0-alpha.1",
+ "rand_core 0.9.0-alpha.1",
+ "zerocopy 0.8.10",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0-alpha.1"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.0-alpha.1",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.9.0-alpha.1"
+dependencies = [
+ "getrandom",
+ "zerocopy 0.8.10",
+]
+
+[[package]]
+name = "rand_distr"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32cb0b9bc82b0a0876c2dd994a7e7a2683d3e7390ca40e6886785ef0c7e3ee31"
+dependencies = [
+ "num-traits",
+ "rand 0.8.5",
+]
+
+[[package]]
+name = "rand_distr"
+version = "0.5.0-alpha.1"
+dependencies = [
+ "num-traits",
+ "rand 0.9.0-alpha.1",
+]
+
+[[package]]
+name = "rawpointer"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60a357793950651c4ed0f3f52338f53b2f809f32d83a07f72909fa13e4c6c1e3"
+
+[[package]]
+name = "safe_arch"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3460605018fdc9612bce72735cba0d27efbcd9904780d44c7e3a9948f96148a"
+dependencies = [
+ "bytemuck",
+]
+
+[[package]]
+name = "serde"
+version = "1.0.215"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6513c1ad0b11a9376da888e3e0baa0077f1aed55c17f50e7b2397136129fb88f"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.215"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad1e866f866923f252f05c889987993144fb74e722403468a4ebd70c3cd756c0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "simba"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "061507c94fc6ab4ba1c9a0305018408e312e17c041eb63bef8aa726fa33aceae"
+dependencies = [
+ "approx",
+ "num-complex",
+ "num-traits",
+ "paste",
+ "wide",
+]
+
+[[package]]
+name = "special"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98d279079c3ddec4e7851337070c1055a18b8f606bba0b1aeb054bc059fc2e27"
+dependencies = [
+ "lambert_w",
+ "libm",
+]
+
+[[package]]
+name = "spfunc"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88a453caefb216996e21861a3e6fea3d4318258414d8b727d00dbc40118bb13e"
+dependencies = [
+ "cauchy",
+ "num-complex",
+ "num-traits",
+]
+
+[[package]]
+name = "statrs"
+version = "0.17.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f697a07e4606a0a25c044de247e583a330dbb1731d11bc7350b81f48ad567255"
+dependencies = [
+ "approx",
+ "nalgebra",
+ "num-traits",
+ "rand 0.8.5",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.87"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25aa4ce346d03a6dcd68dd8b4010bcb74e54e62c90c573f394c46eae99aba32d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "typenum"
+version = "1.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e91b56cd4cadaeb79bbf1a5645f6b4f8dc5bde8834ad5894a8db35fda9efa1fe"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "wide"
+version = "0.7.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b828f995bf1e9622031f8009f8481a85406ce1f4d4588ff746d872043e855690"
+dependencies = [
+ "bytemuck",
+ "safe_arch",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
+dependencies = [
+ "byteorder",
+ "zerocopy-derive 0.7.35",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.8.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a13a42ed30c63171d820889b2981318736915150575b8d2d6dbee7edd68336ca"
+dependencies = [
+ "zerocopy-derive 0.8.10",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "593e7c96176495043fcb9e87cf7659f4d18679b5bab6b92bdef359c76a7795dd"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/distr_test/Cargo.toml b/distr_test/Cargo.toml
index 3e51699131..7f37853b3c 100644
--- a/distr_test/Cargo.toml
+++ b/distr_test/Cargo.toml
@@ -8,8 +8,6 @@ publish = false
 rand_distr = { path = "../rand_distr", version = "=0.5.0-alpha.1", default-features = false }
 rand = { path = "..", version = "=0.9.0-alpha.1", features = ["small_rng"] }
 num-traits = "0.2.19"
-# Make 1.61 compatible
-libm = {version = ">=0.2, < 0.2.10"}
 # Special functions for testing distributions
 special = "0.11.0"
 spfunc = "0.1.0"