diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d8256d8..3706dd7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,12 +69,19 @@ jobs:
         run: rustup show
       - name: Cache Rust dependencies
         uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+      - name: Set up coverage tracking
+        run: |
+          pixi run -e ${{ matrix.environment }} cargo llvm-cov clean --workspace
+          echo "$(pixi run -e ${{ matrix.environment }} cargo llvm-cov show-env | tr -d "'")" >> $GITHUB_ENV
+        shell: bash
       - name: Install repository
         run: pixi run -e ${{ matrix.environment }} postinstall
       - name: Run pytest
         run: pixi run -e ${{ matrix.environment }} test-coverage --color=yes ${{ matrix.with_optionals && '-m with_optionals' || '-m "not with_optionals"'}} --cov=dataframely --cov-report=xml
+      - name: Generate Rust coverage
+        run: pixi run -e ${{ matrix.environment }} cargo llvm-cov report --lcov --output-path coverage.lcov
       - name: Upload codecov
         uses: codecov/codecov-action@5a1091511ad55cbe89839c7260b706298ca349f7 # v5.5.1
         with:
-          files: ./coverage.xml
+          files: ./coverage.xml,./coverage.lcov
           token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.gitignore b/.gitignore
index c072bb9..d2aaa95 100644
--- a/.gitignore
+++ b/.gitignore
@@ -188,6 +188,7 @@ htmlcov/
 .cache
 nosetests.xml
 coverage.xml
+coverage.lcov
 *.cover
 *.py,cover
 .hypothesis/
diff --git a/pixi.lock b/pixi.lock
index bd9f84d..6ee013f 100644
--- a/pixi.lock
+++ b/pixi.lock
@@ -494,6 +494,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached-property-1.5.2-hd8ed1ab_1.tar.bz2
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached_property-1.5.2-pyha770c72_1.tar.bz2
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/cargo-llvm-cov-0.6.21-hdab8a38_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/cffi-2.0.0-py314ha6a4811_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cfgv-3.3.1-pyhd8ed1ab_1.conda
@@ -807,6 +808,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached-property-1.5.2-hd8ed1ab_1.tar.bz2
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached_property-1.5.2-pyha770c72_1.tar.bz2
+      - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/cargo-llvm-cov-0.6.21-h1ebd7d5_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/cffi-2.0.0-py314h7fea217_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cfgv-3.3.1-pyhd8ed1ab_1.conda
@@ -1120,6 +1122,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached-property-1.5.2-hd8ed1ab_1.tar.bz2
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached_property-1.5.2-pyha770c72_1.tar.bz2
+      - conda: https://conda.anaconda.org/conda-forge/osx-64/cargo-llvm-cov-0.6.21-h121f529_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-64/cffi-2.0.0-py314h8aa19db_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cfgv-3.3.1-pyhd8ed1ab_1.conda
@@ -1428,6 +1431,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached-property-1.5.2-hd8ed1ab_1.tar.bz2
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached_property-1.5.2-pyha770c72_1.tar.bz2
+      - conda: https://conda.anaconda.org/conda-forge/osx-arm64/cargo-llvm-cov-0.6.21-hd1458d2_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/cffi-2.0.0-py314hb14574c_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cfgv-3.3.1-pyhd8ed1ab_1.conda
@@ -1730,6 +1734,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-h4c7d964_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached-property-1.5.2-hd8ed1ab_1.tar.bz2
       - conda: https://conda.anaconda.org/conda-forge/noarch/cached_property-1.5.2-pyha770c72_1.tar.bz2
+      - conda: https://conda.anaconda.org/conda-forge/win-64/cargo-llvm-cov-0.6.21-h77a83cd_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/win-64/cffi-2.0.0-py314h5a2d7ad_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/cfgv-3.3.1-pyhd8ed1ab_1.conda
@@ -3065,6 +3070,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/bzip2-1.0.8-hda65f42_8.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/c-ares-1.34.5-hb9d3cd8_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/cargo-llvm-cov-0.6.21-hdab8a38_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/cffi-2.0.0-py313hf01b4d8_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -3273,6 +3279,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/bzip2-1.0.8-h4777abc_8.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/c-ares-1.34.5-h86ecc28_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/cargo-llvm-cov-0.6.21-h1ebd7d5_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/cffi-2.0.0-py314h7fea217_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -3480,6 +3487,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/osx-64/bzip2-1.0.8-h500dc9f_8.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-64/c-ares-1.34.5-hf13058a_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/osx-64/cargo-llvm-cov-0.6.21-h121f529_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-64/cffi-2.0.0-py314h8aa19db_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -3678,6 +3686,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/bzip2-1.0.8-hd037594_8.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/c-ares-1.34.5-h5505292_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/osx-arm64/cargo-llvm-cov-0.6.21-hd1458d2_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/cffi-2.0.0-py312hb65edc0_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -3873,6 +3882,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/win-64/bzip2-1.0.8-h0ad9c76_8.conda
       - conda: https://conda.anaconda.org/conda-forge/win-64/c-ares-1.34.5-h2466b09_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-h4c7d964_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/win-64/cargo-llvm-cov-0.6.21-h77a83cd_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/win-64/cffi-2.0.0-py314h5a2d7ad_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -4051,6 +4061,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/brotli-python-1.1.0-py310hea6c23e_4.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/bzip2-1.0.8-hda65f42_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/cargo-llvm-cov-0.6.21-hdab8a38_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/cffi-1.17.1-py310h8deb56e_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -4191,6 +4202,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/brotli-python-1.1.0-py310h57cea71_4.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/bzip2-1.0.8-h4777abc_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/cargo-llvm-cov-0.6.21-h1ebd7d5_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/cffi-1.17.1-py310h1451162_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -4330,6 +4342,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/osx-64/brotli-python-1.1.0-py310h79c4529_4.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-64/bzip2-1.0.8-h500dc9f_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/osx-64/cargo-llvm-cov-0.6.21-h121f529_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-64/cffi-1.17.1-py310hfce808e_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -4462,6 +4475,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/brotli-python-1.1.0-py310h1af2607_4.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/bzip2-1.0.8-hd037594_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/osx-arm64/cargo-llvm-cov-0.6.21-hd1458d2_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/cffi-1.17.1-py310h497396d_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -4595,6 +4609,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/win-64/brotli-python-1.1.0-py310h73ae2b4_4.conda
       - conda: https://conda.anaconda.org/conda-forge/win-64/bzip2-1.0.8-h0ad9c76_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-h4c7d964_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/win-64/cargo-llvm-cov-0.6.21-h77a83cd_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/win-64/cffi-2.0.0-py310h29418f3_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -4736,6 +4751,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/brotli-python-1.1.0-py311h1ddb823_4.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/bzip2-1.0.8-hda65f42_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/cargo-llvm-cov-0.6.21-hdab8a38_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/cffi-2.0.0-py311h5b438cf_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -4874,6 +4890,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/brotli-python-1.1.0-py311h2cb90db_4.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/bzip2-1.0.8-h4777abc_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/cargo-llvm-cov-0.6.21-h1ebd7d5_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/cffi-2.0.0-py311h3324b35_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -5011,6 +5028,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/osx-64/brotli-python-1.1.0-py311h7b20566_4.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-64/bzip2-1.0.8-h500dc9f_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/osx-64/cargo-llvm-cov-0.6.21-h121f529_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-64/cffi-2.0.0-py311h8ebb5ae_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -5141,6 +5159,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/brotli-python-1.1.0-py311hf719da1_4.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/bzip2-1.0.8-hd037594_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/osx-arm64/cargo-llvm-cov-0.6.21-hd1458d2_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/osx-arm64/cffi-2.0.0-py311hcfc1310_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -5272,6 +5291,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/win-64/brotli-python-1.1.0-py311h3e6a449_4.conda
       - conda: https://conda.anaconda.org/conda-forge/win-64/bzip2-1.0.8-h0ad9c76_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-h4c7d964_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/win-64/cargo-llvm-cov-0.6.21-h77a83cd_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/win-64/cffi-2.0.0-py311h3485c13_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/charset-normalizer-3.4.4-pyhd8ed1ab_0.conda
@@ -5412,6 +5432,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/brotli-python-1.1.0-py312h1289d80_4.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/bzip2-1.0.8-hda65f42_8.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/ca-certificates-2025.10.5-hbd8a1cb_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/cargo-llvm-cov-0.6.21-hdab8a38_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/cffi-2.0.0-py312h35888ee_0.conda
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@@ -5550,6 +5571,7 @@ environments:
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@@ -10950,6 +10990,62 @@ packages:
   license_family: BSD
   size: 11065
   timestamp: 1615209567874
+- conda: https://conda.anaconda.org/conda-forge/linux-64/cargo-llvm-cov-0.6.21-hdab8a38_0.conda
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+  - libgcc >=14
+  constrains:
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+  license: Apache-2.0
+  license_family: Apache
+  size: 1355876
+  timestamp: 1760122749560
+- conda: https://conda.anaconda.org/conda-forge/linux-aarch64/cargo-llvm-cov-0.6.21-h1ebd7d5_0.conda
+  sha256: 5b4958811c66f0d0fe310667993f63e709e9731d7b056b8078368e2bf00af7b9
+  md5: a1f7e51b3dbf52bbccee902eec9ed082
+  depends:
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+  constrains:
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+  license: Apache-2.0
+  license_family: Apache
+  size: 1242673
+  timestamp: 1760122724968
+- conda: https://conda.anaconda.org/conda-forge/osx-64/cargo-llvm-cov-0.6.21-h121f529_0.conda
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+  md5: 9b549ed72f8a9bd470662809d04d6fa6
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+  timestamp: 1760123370664
+- conda: https://conda.anaconda.org/conda-forge/osx-arm64/cargo-llvm-cov-0.6.21-hd1458d2_0.conda
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+  md5: 00f5a25289f4eda9f26b161ea728714e
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+  - __osx >=11.0
+  constrains:
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+  license: Apache-2.0
+  license_family: Apache
+  size: 1173082
+  timestamp: 1760122967142
+- conda: https://conda.anaconda.org/conda-forge/win-64/cargo-llvm-cov-0.6.21-h77a83cd_0.conda
+  sha256: 5966c050306b8cc736342eb1c8491c62774beb4a0e1c21f285e315eb2272bbf1
+  md5: 4e415fabfc05f8f87de94c64edb20176
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+  - vc >=14.3,<15
+  - vc14_runtime >=14.44.35208
+  license: Apache-2.0
+  license_family: Apache
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+  timestamp: 1760123000525
 - conda: https://conda.anaconda.org/conda-forge/noarch/certifi-2025.10.5-pyhd8ed1ab_0.conda
   sha256: 955bac31be82592093f6bc006e09822cd13daf52b28643c9a6abd38cd5f4a306
   md5: 257ae203f1d204107ba389607d375ded
diff --git a/pixi.toml b/pixi.toml
index f7b86e5..20ccbf3 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -41,6 +41,7 @@ readthedocs = { cmd = "rm -rf $READTHEDOCS_OUTPUT/html && cp -r docs/_build/html
 
 [feature.test.dependencies]
 boto3 = "*"
+cargo-llvm-cov = "*"
 moto = "*"
 mypy = ">=1.13"
 pandas = "*"
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index e44168f..e725144 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
 channel = "nightly-2025-08-29"
-components = ["clippy", "rustfmt"]
+components = ["clippy", "llvm-tools-preview", "rustfmt"]