diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/.gitignore b/crates/red_knot_workspace/resources/test/empty-unix-venv/.gitignore
deleted file mode 100644
index f59ec20aabf58..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-*
\ No newline at end of file
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate b/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate
deleted file mode 100644
index 06480874a0529..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate
+++ /dev/null
@@ -1,108 +0,0 @@
-# Copyright (c) 2020-202x The virtualenv developers
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-# This file must be used with "source bin/activate" *from bash*
-# you cannot run it directly
-
-
-if [ "${BASH_SOURCE-}" = "$0" ]; then
-    echo "You must source this script: \$ source $0" >&2
-    exit 33
-fi
-
-deactivate () {
-    unset -f pydoc >/dev/null 2>&1 || true
-
-    # reset old environment variables
-    # ! [ -z ${VAR+_} ] returns true if VAR is declared at all
-    if ! [ -z "${_OLD_VIRTUAL_PATH:+_}" ] ; then
-        PATH="$_OLD_VIRTUAL_PATH"
-        export PATH
-        unset _OLD_VIRTUAL_PATH
-    fi
-    if ! [ -z "${_OLD_VIRTUAL_PYTHONHOME+_}" ] ; then
-        PYTHONHOME="$_OLD_VIRTUAL_PYTHONHOME"
-        export PYTHONHOME
-        unset _OLD_VIRTUAL_PYTHONHOME
-    fi
-
-    # The hash command must be called to get it to forget past
-    # commands. Without forgetting past commands the $PATH changes
-    # we made may not be respected
-    hash -r 2>/dev/null
-
-    if ! [ -z "${_OLD_VIRTUAL_PS1+_}" ] ; then
-        PS1="$_OLD_VIRTUAL_PS1"
-        export PS1
-        unset _OLD_VIRTUAL_PS1
-    fi
-
-    unset VIRTUAL_ENV
-    unset VIRTUAL_ENV_PROMPT
-    if [ ! "${1-}" = "nondestructive" ] ; then
-    # Self destruct!
-        unset -f deactivate
-    fi
-}
-
-# unset irrelevant variables
-deactivate nondestructive
-
-VIRTUAL_ENV='/Users/alexw/dev/ruff/crates/red_knot_workspace/resources/test/empty-test-venv'
-if ([ "$OSTYPE" = "cygwin" ] || [ "$OSTYPE" = "msys" ]) && $(command -v cygpath &> /dev/null) ; then
-    VIRTUAL_ENV=$(cygpath -u "$VIRTUAL_ENV")
-fi
-export VIRTUAL_ENV
-
-_OLD_VIRTUAL_PATH="$PATH"
-PATH="$VIRTUAL_ENV/bin:$PATH"
-export PATH
-
-if [ "x" != x ] ; then
-    VIRTUAL_ENV_PROMPT=""
-else
-    VIRTUAL_ENV_PROMPT=$(basename "$VIRTUAL_ENV")
-fi
-export VIRTUAL_ENV_PROMPT
-
-# unset PYTHONHOME if set
-if ! [ -z "${PYTHONHOME+_}" ] ; then
-    _OLD_VIRTUAL_PYTHONHOME="$PYTHONHOME"
-    unset PYTHONHOME
-fi
-
-if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT-}" ] ; then
-    _OLD_VIRTUAL_PS1="${PS1-}"
-    PS1="(${VIRTUAL_ENV_PROMPT}) ${PS1-}"
-    export PS1
-fi
-
-# Make sure to unalias pydoc if it's already there
-alias pydoc 2>/dev/null >/dev/null && unalias pydoc || true
-
-pydoc () {
-    python -m pydoc "$@"
-}
-
-# The hash command must be called to get it to forget past
-# commands. Without forgetting past commands the $PATH changes
-# we made may not be respected
-hash -r 2>/dev/null
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.bat b/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.bat
deleted file mode 100644
index 4ed9b5530885a..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.bat
+++ /dev/null
@@ -1,59 +0,0 @@
-@REM Copyright (c) 2020-202x The virtualenv developers
-@REM
-@REM Permission is hereby granted, free of charge, to any person obtaining
-@REM a copy of this software and associated documentation files (the
-@REM "Software"), to deal in the Software without restriction, including
-@REM without limitation the rights to use, copy, modify, merge, publish,
-@REM distribute, sublicense, and/or sell copies of the Software, and to
-@REM permit persons to whom the Software is furnished to do so, subject to
-@REM the following conditions:
-@REM
-@REM The above copyright notice and this permission notice shall be
-@REM included in all copies or substantial portions of the Software.
-@REM
-@REM THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-@REM EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-@REM MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-@REM NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-@REM LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-@REM OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-@REM WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-@for %%i in ("/Users/alexw/dev/ruff/crates/red_knot_workspace/resources/test/empty-test-venv") do @set "VIRTUAL_ENV=%%~fi"
-
-@set "VIRTUAL_ENV_PROMPT="
-@if NOT DEFINED VIRTUAL_ENV_PROMPT (
-    @for %%d in ("%VIRTUAL_ENV%") do @set "VIRTUAL_ENV_PROMPT=%%~nxd"
-)
-
-@if defined _OLD_VIRTUAL_PROMPT (
-    @set "PROMPT=%_OLD_VIRTUAL_PROMPT%"
-) else (
-    @if not defined PROMPT (
-        @set "PROMPT=$P$G"
-    )
-    @if not defined VIRTUAL_ENV_DISABLE_PROMPT (
-        @set "_OLD_VIRTUAL_PROMPT=%PROMPT%"
-    )
-)
-@if not defined VIRTUAL_ENV_DISABLE_PROMPT (
-    @set "PROMPT=(%VIRTUAL_ENV_PROMPT%) %PROMPT%"
-)
-
-@REM Don't use () to avoid problems with them in %PATH%
-@if defined _OLD_VIRTUAL_PYTHONHOME @goto ENDIFVHOME
-    @set "_OLD_VIRTUAL_PYTHONHOME=%PYTHONHOME%"
-:ENDIFVHOME
-
-@set PYTHONHOME=
-
-@REM if defined _OLD_VIRTUAL_PATH (
-@if not defined _OLD_VIRTUAL_PATH @goto ENDIFVPATH1
-    @set "PATH=%_OLD_VIRTUAL_PATH%"
-:ENDIFVPATH1
-@REM ) else (
-@if defined _OLD_VIRTUAL_PATH @goto ENDIFVPATH2
-    @set "_OLD_VIRTUAL_PATH=%PATH%"
-:ENDIFVPATH2
-
-@set "PATH=%VIRTUAL_ENV%\bin;%PATH%"
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.csh b/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.csh
deleted file mode 100644
index e0e8bc4876b04..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.csh
+++ /dev/null
@@ -1,76 +0,0 @@
-# Copyright (c) 2020-202x The virtualenv developers
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-# This file must be used with "source bin/activate.csh" *from csh*.
-# You cannot run it directly.
-# Created by Davide Di Blasi <davidedb@gmail.com>.
-
-set newline='\
-'
-
-alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH:q" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT:q" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; unsetenv VIRTUAL_ENV_PROMPT; test "\!:*" != "nondestructive" && unalias deactivate && unalias pydoc'
-
-# Unset irrelevant variables.
-deactivate nondestructive
-
-setenv VIRTUAL_ENV '/Users/alexw/dev/ruff/crates/red_knot_workspace/resources/test/empty-test-venv'
-
-set _OLD_VIRTUAL_PATH="$PATH:q"
-setenv PATH "$VIRTUAL_ENV:q/bin:$PATH:q"
-
-
-
-if ('' != "") then
-    setenv VIRTUAL_ENV_PROMPT ''
-else
-    setenv VIRTUAL_ENV_PROMPT "$VIRTUAL_ENV:t:q"
-endif
-
-if ( $?VIRTUAL_ENV_DISABLE_PROMPT ) then
-    if ( $VIRTUAL_ENV_DISABLE_PROMPT == "" ) then
-        set do_prompt = "1"
-    else
-        set do_prompt = "0"
-    endif
-else
-    set do_prompt = "1"
-endif
-
-if ( $do_prompt == "1" ) then
-    # Could be in a non-interactive environment,
-    # in which case, $prompt is undefined and we wouldn't
-    # care about the prompt anyway.
-    if ( $?prompt ) then
-        set _OLD_VIRTUAL_PROMPT="$prompt:q"
-        if ( "$prompt:q" =~ *"$newline:q"* ) then
-            :
-        else
-            set prompt = '('"$VIRTUAL_ENV_PROMPT:q"') '"$prompt:q"
-        endif
-    endif
-endif
-
-unset env_name
-unset do_prompt
-
-alias pydoc python -m pydoc
-
-rehash
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.fish b/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.fish
deleted file mode 100644
index a9044de83e12e..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.fish
+++ /dev/null
@@ -1,124 +0,0 @@
-# Copyright (c) 2020-202x The virtualenv developers
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-# This file must be used using `source bin/activate.fish` *within a running fish ( http://fishshell.com ) session*.
-# Do not run it directly.
-
-function _bashify_path -d "Converts a fish path to something bash can recognize"
-    set fishy_path $argv
-    set bashy_path $fishy_path[1]
-    for path_part in $fishy_path[2..-1]
-        set bashy_path "$bashy_path:$path_part"
-    end
-    echo $bashy_path
-end
-
-function _fishify_path -d "Converts a bash path to something fish can recognize"
-    echo $argv | tr ':' '\n'
-end
-
-function deactivate -d 'Exit virtualenv mode and return to the normal environment.'
-    # reset old environment variables
-    if test -n "$_OLD_VIRTUAL_PATH"
-        # https://github.com/fish-shell/fish-shell/issues/436 altered PATH handling
-        if test (echo $FISH_VERSION | head -c 1) -lt 3
-            set -gx PATH (_fishify_path "$_OLD_VIRTUAL_PATH")
-        else
-            set -gx PATH $_OLD_VIRTUAL_PATH
-        end
-        set -e _OLD_VIRTUAL_PATH
-    end
-
-    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
-        set -gx PYTHONHOME "$_OLD_VIRTUAL_PYTHONHOME"
-        set -e _OLD_VIRTUAL_PYTHONHOME
-    end
-
-    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
-       and functions -q _old_fish_prompt
-        # Set an empty local `$fish_function_path` to allow the removal of `fish_prompt` using `functions -e`.
-        set -l fish_function_path
-
-        # Erase virtualenv's `fish_prompt` and restore the original.
-        functions -e fish_prompt
-        functions -c _old_fish_prompt fish_prompt
-        functions -e _old_fish_prompt
-        set -e _OLD_FISH_PROMPT_OVERRIDE
-    end
-
-    set -e VIRTUAL_ENV
-    set -e VIRTUAL_ENV_PROMPT
-
-    if test "$argv[1]" != 'nondestructive'
-        # Self-destruct!
-        functions -e pydoc
-        functions -e deactivate
-        functions -e _bashify_path
-        functions -e _fishify_path
-    end
-end
-
-# Unset irrelevant variables.
-deactivate nondestructive
-
-set -gx VIRTUAL_ENV '/Users/alexw/dev/ruff/crates/red_knot_workspace/resources/test/empty-test-venv'
-
-# https://github.com/fish-shell/fish-shell/issues/436 altered PATH handling
-if test (echo $FISH_VERSION | head -c 1) -lt 3
-    set -gx _OLD_VIRTUAL_PATH (_bashify_path $PATH)
-else
-    set -gx _OLD_VIRTUAL_PATH $PATH
-end
-set -gx PATH "$VIRTUAL_ENV"'/bin' $PATH
-
-# Prompt override provided?
-# If not, just use the environment name.
-if test -n ''
-    set -gx VIRTUAL_ENV_PROMPT ''
-else
-    set -gx VIRTUAL_ENV_PROMPT (basename "$VIRTUAL_ENV")
-end
-
-# Unset `$PYTHONHOME` if set.
-if set -q PYTHONHOME
-    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
-    set -e PYTHONHOME
-end
-
-function pydoc
-    python -m pydoc $argv
-end
-
-if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
-    # Copy the current `fish_prompt` function as `_old_fish_prompt`.
-    functions -c fish_prompt _old_fish_prompt
-
-    function fish_prompt
-        # Run the user's prompt first; it might depend on (pipe)status.
-        set -l prompt (_old_fish_prompt)
-
-        printf '(%s) ' $VIRTUAL_ENV_PROMPT
-
-        string join -- \n $prompt # handle multi-line prompts
-    end
-
-    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
-end
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.nu b/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.nu
deleted file mode 100644
index 1de75538f4f12..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.nu
+++ /dev/null
@@ -1,117 +0,0 @@
-# Copyright (c) 2020-202x The virtualenv developers
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-# virtualenv activation module
-# Activate with `overlay use activate.nu`
-# Deactivate with `deactivate`, as usual
-#
-# To customize the overlay name, you can call `overlay use activate.nu as foo`,
-# but then simply `deactivate` won't work because it is just an alias to hide
-# the "activate" overlay. You'd need to call `overlay hide foo` manually.
-
-export-env {
-    def is-string [x] {
-        ($x | describe) == 'string'
-    }
-
-    def has-env [...names] {
-        $names | each {|n|
-            $n in $env
-        } | all {|i| $i == true}
-    }
-
-    # Emulates a `test -z`, but btter as it handles e.g 'false'
-    def is-env-true [name: string] {
-      if (has-env $name) {
-        # Try to parse 'true', '0', '1', and fail if not convertible
-        let parsed = (do -i { $env | get $name | into bool })
-        if ($parsed | describe) == 'bool' {
-          $parsed
-        } else {
-          not ($env | get -i $name | is-empty)
-        }
-      } else {
-        false
-      }
-    }
-
-    let virtual_env = '/Users/alexw/dev/ruff/crates/red_knot_workspace/resources/test/empty-test-venv'
-    let bin = 'bin'
-
-    let is_windows = ($nu.os-info.family) == 'windows'
-    let path_name = (if (has-env 'Path') {
-            'Path'
-        } else {
-            'PATH'
-        }
-    )
-
-    let venv_path = ([$virtual_env $bin] | path join)
-    let new_path = ($env | get $path_name | prepend $venv_path)
-
-    # If there is no default prompt, then use the env name instead
-    let virtual_env_prompt = (if ('' | is-empty) {
-        ($virtual_env | path basename)
-    } else {
-        ''
-    })
-
-    let new_env = {
-        $path_name         : $new_path
-        VIRTUAL_ENV        : $virtual_env
-        VIRTUAL_ENV_PROMPT : $virtual_env_prompt
-    }
-
-    let new_env = (if (is-env-true 'VIRTUAL_ENV_DISABLE_PROMPT') {
-      $new_env
-    } else {
-      # Creating the new prompt for the session
-      let virtual_prefix = $'(char lparen)($virtual_env_prompt)(char rparen) '
-
-      # Back up the old prompt builder
-      let old_prompt_command = (if (has-env 'PROMPT_COMMAND') {
-              $env.PROMPT_COMMAND
-          } else {
-              ''
-        })
-
-      let new_prompt = (if (has-env 'PROMPT_COMMAND') {
-          if 'closure' in ($old_prompt_command | describe) {
-              {|| $'($virtual_prefix)(do $old_prompt_command)' }
-          } else {
-              {|| $'($virtual_prefix)($old_prompt_command)' }
-          }
-      } else {
-          {|| $'($virtual_prefix)' }
-      })
-
-      $new_env | merge {
-        PROMPT_COMMAND      : $new_prompt
-        VIRTUAL_PREFIX      : $virtual_prefix
-      }
-    })
-
-    # Environment variables that will be loaded as the virtual env
-    load-env $new_env
-}
-
-export alias pydoc = python -m pydoc
-export alias deactivate = overlay hide activate
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.ps1 b/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.ps1
deleted file mode 100644
index 2d2bc9ab7b80c..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate.ps1
+++ /dev/null
@@ -1,82 +0,0 @@
-# Copyright (c) 2020-202x The virtualenv developers
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-$script:THIS_PATH = $myinvocation.mycommand.path
-$script:BASE_DIR = Split-Path (Resolve-Path "$THIS_PATH/..") -Parent
-
-function global:deactivate([switch] $NonDestructive) {
-    if (Test-Path variable:_OLD_VIRTUAL_PATH) {
-        $env:PATH = $variable:_OLD_VIRTUAL_PATH
-        Remove-Variable "_OLD_VIRTUAL_PATH" -Scope global
-    }
-
-    if (Test-Path function:_old_virtual_prompt) {
-        $function:prompt = $function:_old_virtual_prompt
-        Remove-Item function:\_old_virtual_prompt
-    }
-
-    if ($env:VIRTUAL_ENV) {
-        Remove-Item env:VIRTUAL_ENV -ErrorAction SilentlyContinue
-    }
-
-    if ($env:VIRTUAL_ENV_PROMPT) {
-        Remove-Item env:VIRTUAL_ENV_PROMPT -ErrorAction SilentlyContinue
-    }
-
-    if (!$NonDestructive) {
-        # Self destruct!
-        Remove-Item function:deactivate
-        Remove-Item function:pydoc
-    }
-}
-
-function global:pydoc {
-    python -m pydoc $args
-}
-
-# unset irrelevant variables
-deactivate -nondestructive
-
-$VIRTUAL_ENV = $BASE_DIR
-$env:VIRTUAL_ENV = $VIRTUAL_ENV
-
-if ("" -ne "") {
-    $env:VIRTUAL_ENV_PROMPT = ""
-}
-else {
-    $env:VIRTUAL_ENV_PROMPT = $( Split-Path $env:VIRTUAL_ENV -Leaf )
-}
-
-New-Variable -Scope global -Name _OLD_VIRTUAL_PATH -Value $env:PATH
-
-$env:PATH = "$env:VIRTUAL_ENV/bin:" + $env:PATH
-if (!$env:VIRTUAL_ENV_DISABLE_PROMPT) {
-    function global:_old_virtual_prompt {
-        ""
-    }
-    $function:_old_virtual_prompt = $function:prompt
-
-    function global:prompt {
-        # Add the custom prefix to the existing prompt
-        $previous_prompt_value = & $function:_old_virtual_prompt
-        ("(" + $env:VIRTUAL_ENV_PROMPT + ") " + $previous_prompt_value)
-    }
-}
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate_this.py b/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate_this.py
deleted file mode 100644
index b3d0821f452ba..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/activate_this.py
+++ /dev/null
@@ -1,59 +0,0 @@
-# Copyright (c) 2020-202x The virtualenv developers
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-"""
-Activate virtualenv for current interpreter:
-
-import runpy
-runpy.run_path(this_file)
-
-This can be used when you must use an existing Python interpreter, not the virtualenv bin/python.
-"""  # noqa: D415
-
-from __future__ import annotations
-
-import os
-import site
-import sys
-
-try:
-    abs_file = os.path.abspath(__file__)
-except NameError as exc:
-    msg = "You must use import runpy; runpy.run_path(this_file)"
-    raise AssertionError(msg) from exc
-
-bin_dir = os.path.dirname(abs_file)
-base = bin_dir[: -len("bin") - 1]  # strip away the bin part from the __file__, plus the path separator
-
-# prepend bin to PATH (this file is inside the bin directory)
-os.environ["PATH"] = os.pathsep.join([bin_dir, *os.environ.get("PATH", "").split(os.pathsep)])
-os.environ["VIRTUAL_ENV"] = base  # virtual env is right above bin directory
-os.environ["VIRTUAL_ENV_PROMPT"] = "" or os.path.basename(base)  # noqa: SIM222
-
-# add the virtual environments libraries to the host python import mechanism
-prev_length = len(sys.path)
-for lib in "../lib/python3.12/site-packages".split(os.pathsep):
-    path = os.path.realpath(os.path.join(bin_dir, lib))
-    site.addsitedir(path)
-sys.path[:] = sys.path[prev_length:] + sys.path[0:prev_length]
-
-sys.real_prefix = sys.prefix
-sys.prefix = base
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/deactivate.bat b/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/deactivate.bat
deleted file mode 100644
index 95af1351b0c96..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/deactivate.bat
+++ /dev/null
@@ -1,39 +0,0 @@
-@REM Copyright (c) 2020-202x The virtualenv developers
-@REM
-@REM Permission is hereby granted, free of charge, to any person obtaining
-@REM a copy of this software and associated documentation files (the
-@REM "Software"), to deal in the Software without restriction, including
-@REM without limitation the rights to use, copy, modify, merge, publish,
-@REM distribute, sublicense, and/or sell copies of the Software, and to
-@REM permit persons to whom the Software is furnished to do so, subject to
-@REM the following conditions:
-@REM
-@REM The above copyright notice and this permission notice shall be
-@REM included in all copies or substantial portions of the Software.
-@REM
-@REM THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-@REM EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-@REM MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-@REM NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-@REM LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-@REM OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-@REM WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-@set VIRTUAL_ENV=
-@set VIRTUAL_ENV_PROMPT=
-
-@REM Don't use () to avoid problems with them in %PATH%
-@if not defined _OLD_VIRTUAL_PROMPT @goto ENDIFVPROMPT
-    @set "PROMPT=%_OLD_VIRTUAL_PROMPT%"
-    @set _OLD_VIRTUAL_PROMPT=
-:ENDIFVPROMPT
-
-@if not defined _OLD_VIRTUAL_PYTHONHOME @goto ENDIFVHOME
-    @set "PYTHONHOME=%_OLD_VIRTUAL_PYTHONHOME%"
-    @set _OLD_VIRTUAL_PYTHONHOME=
-:ENDIFVHOME
-
-@if not defined _OLD_VIRTUAL_PATH @goto ENDIFVPATH
-    @set "PATH=%_OLD_VIRTUAL_PATH%"
-    @set _OLD_VIRTUAL_PATH=
-:ENDIFVPATH
\ No newline at end of file
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/pydoc.bat b/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/pydoc.bat
deleted file mode 100644
index 8a8d590d22a32..0000000000000
--- a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/pydoc.bat
+++ /dev/null
@@ -1,22 +0,0 @@
-@REM Copyright (c) 2020-202x The virtualenv developers
-@REM
-@REM Permission is hereby granted, free of charge, to any person obtaining
-@REM a copy of this software and associated documentation files (the
-@REM "Software"), to deal in the Software without restriction, including
-@REM without limitation the rights to use, copy, modify, merge, publish,
-@REM distribute, sublicense, and/or sell copies of the Software, and to
-@REM permit persons to whom the Software is furnished to do so, subject to
-@REM the following conditions:
-@REM
-@REM The above copyright notice and this permission notice shall be
-@REM included in all copies or substantial portions of the Software.
-@REM
-@REM THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-@REM EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-@REM MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-@REM NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-@REM LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-@REM OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-@REM WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-python.exe -m pydoc %*
\ No newline at end of file
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/CACHEDIR.TAG b/crates/red_knot_workspace/resources/test/unix-uv-venv/CACHEDIR.TAG
similarity index 100%
rename from crates/red_knot_workspace/resources/test/empty-unix-venv/CACHEDIR.TAG
rename to crates/red_knot_workspace/resources/test/unix-uv-venv/CACHEDIR.TAG
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/python b/crates/red_knot_workspace/resources/test/unix-uv-venv/bin/python
similarity index 100%
rename from crates/red_knot_workspace/resources/test/empty-unix-venv/bin/python
rename to crates/red_knot_workspace/resources/test/unix-uv-venv/bin/python
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/python3 b/crates/red_knot_workspace/resources/test/unix-uv-venv/bin/python3
similarity index 100%
rename from crates/red_knot_workspace/resources/test/empty-unix-venv/bin/python3
rename to crates/red_knot_workspace/resources/test/unix-uv-venv/bin/python3
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/bin/python3.12 b/crates/red_knot_workspace/resources/test/unix-uv-venv/bin/python3.12
similarity index 100%
rename from crates/red_knot_workspace/resources/test/empty-unix-venv/bin/python3.12
rename to crates/red_knot_workspace/resources/test/unix-uv-venv/bin/python3.12
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/lib/python3.12/site-packages/_virtualenv.pth b/crates/red_knot_workspace/resources/test/unix-uv-venv/lib/python3.12/site-packages/_virtualenv.pth
similarity index 100%
rename from crates/red_knot_workspace/resources/test/empty-unix-venv/lib/python3.12/site-packages/_virtualenv.pth
rename to crates/red_knot_workspace/resources/test/unix-uv-venv/lib/python3.12/site-packages/_virtualenv.pth
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/lib/python3.12/site-packages/_virtualenv.py b/crates/red_knot_workspace/resources/test/unix-uv-venv/lib/python3.12/site-packages/_virtualenv.py
similarity index 100%
rename from crates/red_knot_workspace/resources/test/empty-unix-venv/lib/python3.12/site-packages/_virtualenv.py
rename to crates/red_knot_workspace/resources/test/unix-uv-venv/lib/python3.12/site-packages/_virtualenv.py
diff --git a/crates/red_knot_workspace/resources/test/empty-unix-venv/pyvenv.cfg b/crates/red_knot_workspace/resources/test/unix-uv-venv/pyvenv.cfg
similarity index 100%
rename from crates/red_knot_workspace/resources/test/empty-unix-venv/pyvenv.cfg
rename to crates/red_knot_workspace/resources/test/unix-uv-venv/pyvenv.cfg
diff --git a/crates/red_knot_workspace/src/site_packages.rs b/crates/red_knot_workspace/src/site_packages.rs
index f076e1675a38f..0e6585825b1ba 100644
--- a/crates/red_knot_workspace/src/site_packages.rs
+++ b/crates/red_knot_workspace/src/site_packages.rs
@@ -12,36 +12,6 @@ use std::io;
 
 use ruff_db::system::{System, SystemPath, SystemPathBuf};
 
-/// Attempt to retrieve the `site-packages` directory
-/// associated with a given Python installation.
-///
-/// `sys_prefix_path` is equivalent to the value of [`sys.prefix`]
-/// at runtime in Python. For the case of a virtual environment, where a
-/// Python binary is at `/.venv/bin/python`, `sys.prefix` is the path to
-/// the virtual environment the Python binary lies inside, i.e. `/.venv`,
-/// and `site-packages` will be at `.venv/Lib/site-packages`. System
-/// Python installations generally work the same way: if a system Python
-/// installation lies at `/opt/homebrew/bin/python`, `sys.prefix` will be
-/// `/opt/homebrew`, and `site-packages` will be at
-/// `/opt/homebrew/Lib/site-packages`.
-///
-/// This routine does not verify that `sys_prefix_path` points
-/// to an existing directory on disk; it is assumed that this has already
-/// been checked.
-///
-/// [`sys.prefix`]: https://docs.python.org/3/library/sys.html#sys.prefix
-#[cfg(target_os = "windows")]
-fn site_packages_dir_from_sys_prefix(
-    sys_prefix_path: &SystemPath,
-    system: &dyn System,
-) -> Result<SystemPathBuf, SitePackagesDiscoveryError> {
-    let site_packages = sys_prefix_path.join("Lib/site-packages");
-    system
-        .is_directory(&site_packages)
-        .then_some(site_packages)
-        .ok_or(SitePackagesDiscoveryError::NoSitePackagesDirFound)
-}
-
 /// Attempt to retrieve the `site-packages` directory
 /// associated with a given Python installation.
 ///
@@ -60,11 +30,18 @@ fn site_packages_dir_from_sys_prefix(
 /// been checked.
 ///
 /// [`sys.prefix`]: https://docs.python.org/3/library/sys.html#sys.prefix
-#[cfg(not(target_os = "windows"))]
 fn site_packages_dir_from_sys_prefix(
     sys_prefix_path: &SystemPath,
     system: &dyn System,
 ) -> Result<SystemPathBuf, SitePackagesDiscoveryError> {
+    if cfg!(target_os = "windows") {
+        let site_packages = sys_prefix_path.join("Lib/site-packages");
+        return system
+            .is_directory(&site_packages)
+            .then_some(site_packages)
+            .ok_or(SitePackagesDiscoveryError::NoSitePackagesDirFound);
+    }
+
     // In the Python standard library's `site.py` module (used for finding `site-packages`
     // at runtime), we can find this in [the non-Windows branch]:
     //
@@ -156,9 +133,9 @@ mod tests {
     #[test]
     // Windows venvs have different layouts, and we only have a Unix venv committed for now.
     // This test is skipped on Windows until we commit a Windows venv.
-    #[cfg(not(target_os = "windows"))]
+    #[cfg_attr(target_os = "windows", ignore = "Windows has a different venv layout")]
     fn can_find_site_packages_dir_in_committed_venv() {
-        let path_to_venv = SystemPath::new("resources/test/empty-unix-venv");
+        let path_to_venv = SystemPath::new("resources/test/unix-uv-venv");
         let system = OsSystem::default();
 
         // if this doesn't hold true, the premise of the test is incorrect.