diff --git a/crates/uv/tests/pip_compile.rs b/crates/uv/tests/pip_compile.rs
index b78004d14bb6a..2d32b7df5bf76 100644
--- a/crates/uv/tests/pip_compile.rs
+++ b/crates/uv/tests/pip_compile.rs
@@ -12035,3 +12035,253 @@ fn compile_requires_txt() -> Result<()> {
 
     Ok(())
 }
+
+/// Regression test for: https://github.com/astral-sh/uv/issues/6269
+#[test]
+fn astroid_not_repeated() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str(
+        "\
+alembic==1.8.1
+ipython>=8.4.0
+pylint>=2.14.5
+    ",
+    )?;
+
+    let constraints_txt = context.temp_dir.child("constraints.txt");
+    constraints_txt.write_str(
+        "\
+dill==0.3.1.1
+exceptiongroup==1.0.0rc8
+    ",
+    )?;
+
+    uv_snapshot!(context
+        .pip_compile()
+        .arg("requirements.in")
+        .arg("-c").arg("constraints.txt")
+        .arg("--universal")
+        .arg("-p").arg("3.10"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] requirements.in -c constraints.txt --universal -p 3.10
+    alembic==1.8.1
+        # via -r requirements.in
+    astroid==2.13.5
+        # via pylint
+    astroid==3.1.0 ; python_full_version < '3.11'
+        # via pylint
+    asttokens==2.4.1
+        # via stack-data
+    colorama==0.4.6 ; sys_platform == 'win32'
+        # via
+        #   ipython
+        #   pylint
+    decorator==5.1.1
+        # via ipython
+    dill==0.3.1.1
+        # via
+        #   -c constraints.txt
+        #   pylint
+    exceptiongroup==1.0.0rc8 ; python_full_version < '3.11'
+        # via
+        #   -c constraints.txt
+        #   ipython
+    executing==2.0.1
+        # via stack-data
+    greenlet==3.0.3 ; platform_machine == 'AMD64' or platform_machine == 'WIN32' or platform_machine == 'aarch64' or platform_machine == 'amd64' or platform_machine == 'ppc64le' or platform_machine == 'win32' or platform_machine == 'x86_64'
+        # via sqlalchemy
+    ipython==8.22.2
+        # via -r requirements.in
+    isort==5.13.2
+        # via pylint
+    jedi==0.19.1
+        # via ipython
+    lazy-object-proxy==1.10.0
+        # via astroid
+    mako==1.3.2
+        # via alembic
+    markupsafe==2.1.5
+        # via mako
+    matplotlib-inline==0.1.6
+        # via ipython
+    mccabe==0.7.0
+        # via pylint
+    parso==0.8.3
+        # via jedi
+    pexpect==4.9.0 ; sys_platform != 'emscripten' and sys_platform != 'win32'
+        # via ipython
+    platformdirs==4.2.0
+        # via pylint
+    prompt-toolkit==3.0.43
+        # via ipython
+    ptyprocess==0.7.0 ; sys_platform != 'emscripten' and sys_platform != 'win32'
+        # via pexpect
+    pure-eval==0.2.2
+        # via stack-data
+    pygments==2.17.2
+        # via ipython
+    pylint==2.15.8
+        # via -r requirements.in
+    pylint==3.1.0 ; python_full_version < '3.11'
+        # via -r requirements.in
+    six==1.16.0
+        # via asttokens
+    sqlalchemy==2.0.29
+        # via alembic
+    stack-data==0.6.3
+        # via ipython
+    tomli==2.0.1 ; python_full_version < '3.11'
+        # via pylint
+    tomlkit==0.12.4
+        # via pylint
+    traitlets==5.14.2
+        # via
+        #   ipython
+        #   matplotlib-inline
+    typing-extensions==4.10.0
+        # via
+        #   astroid
+        #   sqlalchemy
+    wcwidth==0.2.13
+        # via prompt-toolkit
+    wrapt==1.16.0
+        # via astroid
+
+    ----- stderr -----
+    warning: The requested Python version 3.10 is not available; 3.12.1 will be used to build dependencies instead.
+    Resolved 36 packages in [TIME]
+    "###);
+
+    Ok(())
+}
+
+/// Regression test for: https://github.com/astral-sh/uv/issues/6412
+#[test]
+fn tomli_less_than_python311() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str(
+        "\
+coverage[toml]
+pandas
+matplotlib
+    ",
+    )?;
+
+    uv_snapshot!(context
+        .pip_compile()
+        .arg("requirements.in").arg("--universal").arg("-p").arg("3.8"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] requirements.in --universal -p 3.8
+    contourpy==1.1.1
+        # via matplotlib
+    coverage==7.4.4
+        # via -r requirements.in
+    cycler==0.12.1
+        # via matplotlib
+    fonttools==4.50.0
+        # via matplotlib
+    importlib-resources==6.4.0 ; python_full_version < '3.10'
+        # via matplotlib
+    kiwisolver==1.4.5
+        # via matplotlib
+    matplotlib==3.7.5
+        # via -r requirements.in
+    numpy==1.24.4 ; python_full_version < '3.12'
+        # via
+        #   contourpy
+        #   matplotlib
+        #   pandas
+    numpy==1.26.4 ; python_full_version >= '3.12'
+        # via
+        #   contourpy
+        #   matplotlib
+        #   pandas
+    packaging==24.0
+        # via matplotlib
+    pandas==2.0.3
+        # via -r requirements.in
+    pillow==10.2.0
+        # via matplotlib
+    pyparsing==3.1.2
+        # via matplotlib
+    python-dateutil==2.9.0.post0
+        # via
+        #   matplotlib
+        #   pandas
+    pytz==2024.1
+        # via pandas
+    six==1.16.0
+        # via python-dateutil
+    tomli==2.0.1 ; python_full_version == '3.11'
+        # via coverage
+    tzdata==2024.1
+        # via pandas
+    zipp==3.18.1 ; python_full_version < '3.10'
+        # via importlib-resources
+
+    ----- stderr -----
+    warning: The requested Python version 3.8 is not available; 3.12.1 will be used to build dependencies instead.
+    Resolved 19 packages in [TIME]
+    "###);
+
+    Ok(())
+}
+
+/// Regression test for: https://github.com/astral-sh/uv/issues/6836
+#[test]
+fn importlib_metadata_not_repeated() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let uv_toml = context.temp_dir.child("uv.toml");
+    uv_toml.write_str(r#"environments = ["python_version >= '3.10'", "python_version >= '3.8' and python_version < '3.10'", "python_version < '3.8'"]"#)?;
+    let requirements_in = context.temp_dir.child("requirements.in");
+    requirements_in.write_str("build")?;
+
+    uv_snapshot!(context
+        .pip_compile()
+        .arg("requirements.in").arg("--universal").arg("-p").arg("3.7"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    # This file was autogenerated by uv via the following command:
+    #    uv pip compile --cache-dir [CACHE_DIR] requirements.in --universal -p 3.7
+    build==1.1.1
+        # via -r requirements.in
+    colorama==0.4.6 ; os_name == 'nt'
+        # via build
+    importlib-metadata==6.7.0 ; python_full_version < '3.10'
+        # via build
+    importlib-metadata==7.1.0 ; python_full_version < '3.10.2'
+        # via build
+    packaging==24.0
+        # via build
+    pyproject-hooks==1.0.0
+        # via build
+    tomli==2.0.1 ; python_full_version < '3.11'
+        # via
+        #   build
+        #   pyproject-hooks
+    typing-extensions==4.7.1 ; python_full_version < '3.8'
+        # via importlib-metadata
+    zipp==3.15.0 ; python_full_version < '3.10'
+        # via importlib-metadata
+    zipp==3.18.1 ; python_full_version < '3.10.2'
+        # via importlib-metadata
+
+    ----- stderr -----
+    warning: The requested Python version 3.7 is not available; 3.12.1 will be used to build dependencies instead.
+    Resolved 10 packages in [TIME]
+    "###);
+
+    Ok(())
+}