diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8b5347dfc..dcbe195e8 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -37,7 +37,7 @@ repos:
     hooks:
     -   id: flake8
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.20.2
+    rev: v2.0.0
     hooks:
     -   id: mypy
         additional_dependencies: [types-pyyaml]
diff --git a/pre_commit/languages/rust.py b/pre_commit/languages/rust.py
index fd77a9d29..4c0a99baf 100644
--- a/pre_commit/languages/rust.py
+++ b/pre_commit/languages/rust.py
@@ -82,7 +82,7 @@ def _add_dependencies(
 
 def install_rust_with_toolchain(toolchain: str, envdir: str) -> None:
     with tempfile.TemporaryDirectory() as rustup_dir:
-        with envcontext((('CARGO_HOME', envdir), ('RUSTUP_HOME', rustup_dir))):
+        with envcontext((('CARGO_HOME', envdir), ('RUSTUP_HOME', envdir))):
             # acquire `rustup` if not present
             if parse_shebang.find_executable('rustup') is None:
                 # We did not detect rustup and need to download it first.
diff --git a/testing/get-coursier.sh b/testing/get-coursier.sh
index 958e73b24..0087feb82 100755
--- a/testing/get-coursier.sh
+++ b/testing/get-coursier.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-if [ "$OSTYPE" = msys ]; then
+if [ "$OSTYPE" = cygwin ]; then
     URL='https://github.com/coursier/coursier/releases/download/v2.1.0-RC4/cs-x86_64-pc-win32.zip'
     SHA256='0d07386ff0f337e3e6264f7dde29d137dda6eaa2385f29741435e0b93ccdb49d'
     TARGET='/tmp/coursier/cs.zip'
diff --git a/testing/get-dart.sh b/testing/get-dart.sh
index b4545e71e..ad7f8608a 100755
--- a/testing/get-dart.sh
+++ b/testing/get-dart.sh
@@ -3,7 +3,7 @@ set -euo pipefail
 
 VERSION=2.19.6
 
-if [ "$OSTYPE" = msys ]; then
+if [ "$OSTYPE" = cygwin ]; then
     URL="https://storage.googleapis.com/dart-archive/channels/stable/release/${VERSION}/sdk/dartsdk-windows-x64-release.zip"
     cygpath -w /tmp/dart-sdk/bin >> "$GITHUB_PATH"
 else
diff --git a/tests/languages/rust_test.py b/tests/languages/rust_test.py
index 52e356134..60e814641 100644
--- a/tests/languages/rust_test.py
+++ b/tests/languages/rust_test.py
@@ -14,22 +14,38 @@
 ACTUAL_GET_DEFAULT_VERSION = rust.get_default_version.__wrapped__
 
 
+def requires_locally_installed_cargo():
+    return pytest.mark.skipif(
+        parse_shebang.find_executable('cargo') is None,
+        reason='Cargo is not installed in the local environment',
+    )
+
+def requires_locally_installed_rustup():
+    return pytest.mark.skipif(
+        parse_shebang.find_executable('rustup') is None,
+        reason = "Cargo is not installed in the local environment"
+    )
+
+
 @pytest.fixture
 def cmd_output_b_mck():
     with mock.patch.object(rust, 'cmd_output_b') as mck:
         yield mck
 
 
+@requires_locally_installed_cargo()
 def test_sets_system_when_rust_is_available(cmd_output_b_mck):
     cmd_output_b_mck.return_value = (0, b'', b'')
     assert ACTUAL_GET_DEFAULT_VERSION() == 'system'
 
 
+@requires_locally_installed_cargo()
 def test_uses_default_when_rust_is_not_available(cmd_output_b_mck):
     cmd_output_b_mck.return_value = (127, b'', b'error: not found')
     assert ACTUAL_GET_DEFAULT_VERSION() == C.DEFAULT
 
 
+@requires_locally_installed_cargo()
 def test_selects_system_even_if_rust_toolchain_toml(tmp_path):
     toolchain_toml = '[toolchain]\nchannel = "wtf"\n'
     tmp_path.joinpath('rust-toolchain.toml').write_text(toolchain_toml)
@@ -73,10 +89,9 @@ def mck(exe, env=None):
     assert calls == ['rustup', 'rustup', 'cargo', 'hello_world']
     assert ret == (0, b'Hello, world!\n')
 
-
+@requires_locally_installed_rustup()
 @pytest.mark.parametrize('version', (C.DEFAULT, '1.56.0'))
 def test_language_version_with_rustup(tmp_path, version):
-    assert parse_shebang.find_executable('rustup') is not None
 
     _make_hello_world(tmp_path)
 
@@ -84,6 +99,7 @@ def test_language_version_with_rustup(tmp_path, version):
     assert ret == (0, b'Hello, world!\n')
 
 
+@requires_locally_installed_cargo()
 @pytest.mark.parametrize('dep', ('cli:shellharden:4.2.0', 'cli:shellharden'))
 def test_rust_cli_additional_dependencies(tmp_path, dep):
     _make_local_repo(str(tmp_path))
@@ -102,6 +118,7 @@ def test_rust_cli_additional_dependencies(tmp_path, dep):
     assert ret == (0, b'echo "$hi"\n')
 
 
+@requires_locally_installed_cargo()
 def test_run_lib_additional_dependencies(tmp_path):
     _make_hello_world(tmp_path)