diff --git a/scripts/rust_is_available_test.py b/scripts/rust_is_available_test.py
new file mode 100755
index 0000000000000000000000000000000000000000..57613fe5ed754585394edb86aef29f2f52b4bf93
--- /dev/null
+++ b/scripts/rust_is_available_test.py
@@ -0,0 +1,346 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+"""Tests the `rust_is_available.sh` script.
+
+Some of the tests require the real programs to be available in `$PATH`
+under their canonical name (and with the expected versions).
+"""
+
+import enum
+import os
+import pathlib
+import stat
+import subprocess
+import tempfile
+import unittest
+
+class TestRustIsAvailable(unittest.TestCase):
+    @enum.unique
+    class Expected(enum.Enum):
+        SUCCESS = enum.auto()
+        SUCCESS_WITH_WARNINGS = enum.auto()
+        SUCCESS_WITH_EXTRA_OUTPUT = enum.auto()
+        FAILURE = enum.auto()
+
+    @classmethod
+    def generate_executable(cls, content):
+        path = pathlib.Path(cls.tempdir.name)
+        name = str(len(tuple(path.iterdir())))
+        path = path / name
+        with open(path, "w") as file_:
+            file_.write(content)
+        os.chmod(path, os.stat(path).st_mode | stat.S_IXUSR)
+        return path
+
+    @classmethod
+    def generate_clang(cls, stdout):
+        return cls.generate_executable(f"""#!/usr/bin/env python3
+import sys
+if "-E" in " ".join(sys.argv):
+    print({repr("Clang " + " ".join(cls.llvm_default_version.split(" ")))})
+else:
+    print({repr(stdout)})
+""")
+
+    @classmethod
+    def generate_rustc(cls, stdout):
+        return cls.generate_executable(f"""#!/usr/bin/env python3
+import sys
+if "--print sysroot" in " ".join(sys.argv):
+    print({repr(cls.rust_default_sysroot)})
+else:
+    print({repr(stdout)})
+""")
+
+    @classmethod
+    def generate_bindgen(cls, version_stdout, libclang_stderr):
+        return cls.generate_executable(f"""#!/usr/bin/env python3
+import sys
+if "rust_is_available_bindgen_libclang.h" in " ".join(sys.argv):
+    print({repr(libclang_stderr)}, file=sys.stderr)
+else:
+    print({repr(version_stdout)})
+""")
+
+    @classmethod
+    def generate_bindgen_version(cls, stdout):
+        return cls.generate_bindgen(stdout, cls.bindgen_default_bindgen_libclang_stderr)
+
+    @classmethod
+    def generate_bindgen_libclang(cls, stderr):
+        return cls.generate_bindgen(cls.bindgen_default_bindgen_version_stdout, stderr)
+
+    @classmethod
+    def setUpClass(cls):
+        cls.tempdir = tempfile.TemporaryDirectory()
+
+        cls.missing = pathlib.Path(cls.tempdir.name) / "missing"
+
+        cls.nonexecutable = pathlib.Path(cls.tempdir.name) / "nonexecutable"
+        with open(cls.nonexecutable, "w") as file_:
+            file_.write("nonexecutable")
+
+        cls.unexpected_binary = "true"
+
+        cls.rustc_default_version = subprocess.check_output(("scripts/min-tool-version.sh", "rustc")).decode().strip()
+        cls.bindgen_default_version = subprocess.check_output(("scripts/min-tool-version.sh", "bindgen")).decode().strip()
+        cls.llvm_default_version = subprocess.check_output(("scripts/min-tool-version.sh", "llvm")).decode().strip()
+        cls.rust_default_sysroot = subprocess.check_output(("rustc", "--print", "sysroot")).decode().strip()
+
+        cls.bindgen_default_bindgen_version_stdout = f"bindgen {cls.bindgen_default_version}"
+        cls.bindgen_default_bindgen_libclang_stderr = f"scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {cls.llvm_default_version} [-W#pragma-messages], err: false"
+
+        cls.default_rustc = cls.generate_rustc(f"rustc {cls.rustc_default_version}")
+        cls.default_bindgen =  cls.generate_bindgen(cls.bindgen_default_bindgen_version_stdout, cls.bindgen_default_bindgen_libclang_stderr)
+        cls.default_cc = cls.generate_clang(f"clang version {cls.llvm_default_version}")
+
+    def run_script(self, expected, override_env):
+        env = {
+            "RUSTC": self.default_rustc,
+            "BINDGEN": self.default_bindgen,
+            "CC": self.default_cc,
+        }
+
+        for key, value in override_env.items():
+            if value is None:
+                del env[key]
+                continue
+            env[key] = value
+
+        result = subprocess.run("scripts/rust_is_available.sh", env=env, capture_output=True)
+
+        # The script should never output anything to `stdout`.
+        self.assertEqual(result.stdout, b"")
+
+        if expected == self.Expected.SUCCESS:
+            # When expecting a success, the script should return 0
+            # and it should not output anything to `stderr`.
+            self.assertEqual(result.returncode, 0)
+            self.assertEqual(result.stderr, b"")
+        elif expected == self.Expected.SUCCESS_WITH_EXTRA_OUTPUT:
+            # When expecting a success with extra output (that is not warnings,
+            # which is the common case), the script should return 0 and it
+            # should output at least something to `stderr` (the output should
+            # be checked further by the test).
+            self.assertEqual(result.returncode, 0)
+            self.assertNotEqual(result.stderr, b"")
+        elif expected == self.Expected.SUCCESS_WITH_WARNINGS:
+            # When expecting a success with warnings, the script should return 0
+            # and it should output at least the instructions to `stderr`.
+            self.assertEqual(result.returncode, 0)
+            self.assertIn(b"Please see Documentation/rust/quick-start.rst for details", result.stderr)
+        else:
+            # When expecting a failure, the script should return non-0
+            # and it should output at least the instructions to `stderr`.
+            self.assertNotEqual(result.returncode, 0)
+            self.assertIn(b"Please see Documentation/rust/quick-start.rst for details", result.stderr)
+
+        # The output will generally be UTF-8 (i.e. unless the user has
+        # put strange values in the environment).
+        result.stderr = result.stderr.decode()
+
+        return result
+
+    def test_rustc_unset(self):
+        result = self.run_script(self.Expected.FAILURE, { "RUSTC": None })
+        self.assertIn("Environment variable 'RUSTC' is not set.", result.stderr)
+        self.assertIn("This script is intended to be called from Kbuild.", result.stderr)
+
+    def test_bindgen_unset(self):
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": None })
+        self.assertIn("Environment variable 'BINDGEN' is not set.", result.stderr)
+        self.assertIn("This script is intended to be called from Kbuild.", result.stderr)
+
+    def test_cc_unset(self):
+        result = self.run_script(self.Expected.FAILURE, { "CC": None })
+        self.assertIn("Environment variable 'CC' is not set.", result.stderr)
+        self.assertIn("This script is intended to be called from Kbuild.", result.stderr)
+
+    def test_rustc_missing(self):
+        result = self.run_script(self.Expected.FAILURE, { "RUSTC": self.missing })
+        self.assertIn(f"Rust compiler '{self.missing}' could not be found.", result.stderr)
+
+    def test_bindgen_missing(self):
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": self.missing })
+        self.assertIn(f"Rust bindings generator '{self.missing}' could not be found.", result.stderr)
+
+    def test_rustc_nonexecutable(self):
+        result = self.run_script(self.Expected.FAILURE, { "RUSTC": self.nonexecutable })
+        self.assertIn(f"Running '{self.nonexecutable}' to check the Rust compiler version failed with", result.stderr)
+
+    def test_rustc_unexpected_binary(self):
+        result = self.run_script(self.Expected.FAILURE, { "RUSTC": self.unexpected_binary })
+        self.assertIn(f"Running '{self.unexpected_binary}' to check the Rust compiler version did not return", result.stderr)
+
+    def test_rustc_unexpected_name(self):
+        rustc = self.generate_rustc(f"unexpected {self.rustc_default_version} (a8314ef7d 2022-06-27)")
+        result = self.run_script(self.Expected.FAILURE, { "RUSTC": rustc })
+        self.assertIn(f"Running '{rustc}' to check the Rust compiler version did not return", result.stderr)
+
+    def test_rustc_unexpected_version(self):
+        rustc = self.generate_rustc("rustc unexpected (a8314ef7d 2022-06-27)")
+        result = self.run_script(self.Expected.FAILURE, { "RUSTC": rustc })
+        self.assertIn(f"Running '{rustc}' to check the Rust compiler version did not return", result.stderr)
+
+    def test_rustc_no_minor(self):
+        rustc = self.generate_rustc(f"rustc {'.'.join(self.rustc_default_version.split('.')[:2])} (a8314ef7d 2022-06-27)")
+        result = self.run_script(self.Expected.FAILURE, { "RUSTC": rustc })
+        self.assertIn(f"Running '{rustc}' to check the Rust compiler version did not return", result.stderr)
+
+    def test_rustc_old_version(self):
+        rustc = self.generate_rustc("rustc 1.60.0 (a8314ef7d 2022-06-27)")
+        result = self.run_script(self.Expected.FAILURE, { "RUSTC": rustc })
+        self.assertIn(f"Rust compiler '{rustc}' is too old.", result.stderr)
+
+    def test_rustc_new_version(self):
+        rustc = self.generate_rustc("rustc 1.999.0 (a8314ef7d 2099-06-27)")
+        result = self.run_script(self.Expected.SUCCESS_WITH_WARNINGS, { "RUSTC": rustc })
+        self.assertIn(f"Rust compiler '{rustc}' is too new. This may or may not work.", result.stderr)
+
+    def test_bindgen_nonexecutable(self):
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": self.nonexecutable })
+        self.assertIn(f"Running '{self.nonexecutable}' to check the Rust bindings generator version failed with", result.stderr)
+
+    def test_bindgen_unexpected_binary(self):
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": self.unexpected_binary })
+        self.assertIn(f"Running '{self.unexpected_binary}' to check the bindings generator version did not return", result.stderr)
+
+    def test_bindgen_unexpected_name(self):
+        bindgen = self.generate_bindgen_version(f"unexpected {self.bindgen_default_version}")
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
+        self.assertIn(f"Running '{bindgen}' to check the bindings generator version did not return", result.stderr)
+
+    def test_bindgen_unexpected_version(self):
+        bindgen = self.generate_bindgen_version("bindgen unexpected")
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
+        self.assertIn(f"Running '{bindgen}' to check the bindings generator version did not return", result.stderr)
+
+    def test_bindgen_no_minor(self):
+        bindgen = self.generate_bindgen_version(f"bindgen {'.'.join(self.bindgen_default_version.split('.')[:2])}")
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
+        self.assertIn(f"Running '{bindgen}' to check the bindings generator version did not return", result.stderr)
+
+    def test_bindgen_old_version(self):
+        bindgen = self.generate_bindgen_version("bindgen 0.50.0")
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
+        self.assertIn(f"Rust bindings generator '{bindgen}' is too old.", result.stderr)
+
+    def test_bindgen_new_version(self):
+        bindgen = self.generate_bindgen_version("bindgen 0.999.0")
+        result = self.run_script(self.Expected.SUCCESS_WITH_WARNINGS, { "BINDGEN": bindgen })
+        self.assertIn(f"Rust bindings generator '{bindgen}' is too new. This may or may not work.", result.stderr)
+
+    def test_bindgen_libclang_failure(self):
+        for env in (
+            { "LLVM_CONFIG_PATH": self.missing },
+            { "LIBCLANG_PATH": self.missing },
+            { "CLANG_PATH": self.missing },
+        ):
+            with self.subTest(env=env):
+                result = self.run_script(self.Expected.FAILURE, env | { "PATH": os.environ["PATH"], "BINDGEN": "bindgen" })
+                self.assertIn("Running 'bindgen' to check the libclang version (used by the Rust", result.stderr)
+                self.assertIn("bindings generator) failed with code ", result.stderr)
+
+    def test_bindgen_libclang_unexpected_version(self):
+        bindgen = self.generate_bindgen_libclang("scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version unexpected [-W#pragma-messages], err: false")
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
+        self.assertIn(f"Running '{bindgen}' to check the libclang version (used by the Rust", result.stderr)
+        self.assertIn("bindings generator) did not return an expected output. See output", result.stderr)
+
+    def test_bindgen_libclang_old_version(self):
+        bindgen = self.generate_bindgen_libclang("scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version 10.0.0 [-W#pragma-messages], err: false")
+        result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
+        self.assertIn(f"libclang (used by the Rust bindings generator '{bindgen}') is too old.", result.stderr)
+
+    def test_clang_matches_bindgen_libclang_different_bindgen(self):
+        bindgen = self.generate_bindgen_libclang("scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version 999.0.0 [-W#pragma-messages], err: false")
+        result = self.run_script(self.Expected.SUCCESS_WITH_WARNINGS, { "BINDGEN": bindgen })
+        self.assertIn("version does not match Clang's. This may be a problem.", result.stderr)
+
+    def test_clang_matches_bindgen_libclang_different_clang(self):
+        cc = self.generate_clang("clang version 999.0.0")
+        result = self.run_script(self.Expected.SUCCESS_WITH_WARNINGS, { "CC": cc })
+        self.assertIn("version does not match Clang's. This may be a problem.", result.stderr)
+
+    def test_rustc_src_core_krustflags(self):
+        result = self.run_script(self.Expected.FAILURE, { "PATH": os.environ["PATH"], "RUSTC": "rustc", "KRUSTFLAGS": f"--sysroot={self.missing}" })
+        self.assertIn("Source code for the 'core' standard library could not be found", result.stderr)
+
+    def test_rustc_src_core_rustlibsrc(self):
+        result = self.run_script(self.Expected.FAILURE, { "RUST_LIB_SRC": self.missing })
+        self.assertIn("Source code for the 'core' standard library could not be found", result.stderr)
+
+    def test_success_cc_unknown(self):
+        result = self.run_script(self.Expected.SUCCESS_WITH_EXTRA_OUTPUT, { "CC": self.missing })
+        self.assertIn("unknown C compiler", result.stderr)
+
+    def test_success_cc_multiple_arguments_ccache(self):
+        clang = self.generate_clang(f"""Ubuntu clang version {self.llvm_default_version}-1ubuntu1
+Target: x86_64-pc-linux-gnu
+Thread model: posix
+InstalledDir: /usr/bin
+""")
+        result = self.run_script(self.Expected.SUCCESS, { "CC": f"{clang} clang" })
+
+    def test_success_rustc_version(self):
+        for rustc_stdout in (
+            f"rustc {self.rustc_default_version} (a8314ef7d 2022-06-27)",
+            f"rustc {self.rustc_default_version}-dev (a8314ef7d 2022-06-27)",
+            f"rustc {self.rustc_default_version}-1.60.0 (a8314ef7d 2022-06-27)",
+        ):
+            with self.subTest(rustc_stdout=rustc_stdout):
+                rustc = self.generate_rustc(rustc_stdout)
+                result = self.run_script(self.Expected.SUCCESS, { "RUSTC": rustc })
+
+    def test_success_bindgen_version(self):
+        for bindgen_stdout in (
+            f"bindgen {self.bindgen_default_version}",
+            f"bindgen {self.bindgen_default_version}-dev",
+            f"bindgen {self.bindgen_default_version}-0.999.0",
+        ):
+            with self.subTest(bindgen_stdout=bindgen_stdout):
+                bindgen = self.generate_bindgen_version(bindgen_stdout)
+                result = self.run_script(self.Expected.SUCCESS, { "BINDGEN": bindgen })
+
+    def test_success_bindgen_libclang(self):
+        for stderr in (
+            f"scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version} (https://github.com/llvm/llvm-project.git 4a2c05b05ed07f1f620e94f6524a8b4b2760a0b1) [-W#pragma-messages], err: false",
+            f"/home/jd/Documents/dev/kernel-module-flake/linux-6.1/outputs/dev/lib/modules/6.1.0-development/source/scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version}  [-W#pragma-messages], err: false",
+            f"scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version} (Fedora 13.0.0-3.fc35) [-W#pragma-messages], err: false",
+            f"""
+/nix/store/dsd5gz46hdbdk2rfdimqddhq6m8m8fqs-bash-5.1-p16/bin/bash: warning: setlocale: LC_ALL: cannot change locale (c)
+scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version}  [-W#pragma-messages], err: false
+""",
+            f"""
+/nix/store/dsd5gz46hdbdk2rfdimqddhq6m8m8fqs-bash-5.1.0-p16/bin/bash: warning: setlocale: LC_ALL: cannot change locale (c)
+/home/jd/Documents/dev/kernel-module-flake/linux-6.1/outputs/dev/lib/modules/6.1.0-development/source/scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version} (Fedora 13.0.0-3.fc35) [-W#pragma-messages], err: false
+"""
+        ):
+            with self.subTest(stderr=stderr):
+                bindgen = self.generate_bindgen_libclang(stderr)
+                result = self.run_script(self.Expected.SUCCESS, { "BINDGEN": bindgen })
+
+    def test_success_clang_version(self):
+        for clang_stdout in (
+            f"clang version {self.llvm_default_version} (https://github.com/llvm/llvm-project.git 4a2c05b05ed07f1f620e94f6524a8b4b2760a0b1)",
+            f"clang version {self.llvm_default_version}-dev",
+            f"clang version {self.llvm_default_version}-2~ubuntu20.04.1",
+            f"Ubuntu clang version {self.llvm_default_version}-2~ubuntu20.04.1",
+        ):
+            with self.subTest(clang_stdout=clang_stdout):
+                clang = self.generate_clang(clang_stdout)
+                result = self.run_script(self.Expected.SUCCESS, { "CC": clang })
+
+    def test_success_real_programs(self):
+        for cc in ["gcc", "clang"]:
+            with self.subTest(cc=cc):
+                result = self.run_script(self.Expected.SUCCESS, {
+                    "PATH": os.environ["PATH"],
+                    "RUSTC": "rustc",
+                    "BINDGEN": "bindgen",
+                    "CC": cc,
+                })
+
+if __name__ == "__main__":
+    unittest.main()