diff --git a/tools/impl/test_config.py b/tools/impl/test_config.py
index f5df8b7623..bfe158d06c 100755
--- a/tools/impl/test_config.py
+++ b/tools/impl/test_config.py
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import enum
+from typing import List, Dict
 
 
 class TestOption(enum.Enum):
@@ -69,7 +70,7 @@ WIN64_DISABLED_CRATES = [
     "x86_64",
 ]
 
-CRATE_OPTIONS: dict[str, list[TestOption]] = {
+CRATE_OPTIONS: Dict[str, List[TestOption]] = {
     "base": [TestOption.SINGLE_THREADED, TestOption.LARGE],
     "cros_async": [TestOption.LARGE],
     "crosvm": [TestOption.SINGLE_THREADED],
@@ -116,7 +117,7 @@ CRATE_OPTIONS: dict[str, list[TestOption]] = {
 for name in WIN64_DISABLED_CRATES:
     CRATE_OPTIONS[name] = CRATE_OPTIONS.get(name, []) + [TestOption.DO_NOT_BUILD_WIN64]
 
-BUILD_FEATURES: dict[str, str] = {
+BUILD_FEATURES: Dict[str, str] = {
     "x86_64": "linux-x86_64",
     "aarch64": "linux-aarch64",
     "armhf": "linux-armhf",
diff --git a/tools/impl/test_runner.py b/tools/impl/test_runner.py
index 3c5cd52bfe..c805fad4ee 100644
--- a/tools/impl/test_runner.py
+++ b/tools/impl/test_runner.py
@@ -138,8 +138,8 @@ def exclude_crosvm(target_arch: Arch):
 def cargo(
     cargo_command: str,
     cwd: Path,
-    flags: list[str],
-    env: dict[str, str],
+    flags: List[str],
+    env: Dict[str, str],
     build_arch: Arch,
 ) -> Iterable[Executable]:
     """
@@ -207,7 +207,7 @@ def cargo(
 
 
 def cargo_build_executables(
-    flags: list[str],
+    flags: List[str],
     build_arch: Arch,
     cwd: Path = Path("."),
     env: Dict[str, str] = {},
@@ -221,7 +221,7 @@ def cargo_build_executables(
     yield from cargo("test", cwd, ["--no-run", *flags], env, build_arch)
 
 
-def build_common_crate(build_env: dict[str, str], build_arch: Arch, crate: Crate):
+def build_common_crate(build_env: Dict[str, str], build_arch: Arch, crate: Crate):
     print(f"Building tests for: common/{crate.name}")
     return list(cargo_build_executables([], build_arch, env=build_env, cwd=crate.path))
 
@@ -282,7 +282,7 @@ def execute_test(target: TestTarget, executable: Executable):
     Test output is hidden unless the test fails or VERBOSE mode is enabled.
     """
     options = CRATE_OPTIONS.get(executable.crate_name, [])
-    args: list[str] = []
+    args: List[str] = []
     if TestOption.SINGLE_THREADED in options:
         args += ["--test-threads=1"]
 
@@ -324,7 +324,7 @@ def execute_test(target: TestTarget, executable: Executable):
 
 
 def execute_all(
-    executables: list[Executable],
+    executables: List[Executable],
     target: test_target.TestTarget,
     repeat: int,
 ):
@@ -353,7 +353,7 @@ def execute_all(
     print()
 
 
-def find_crosvm_binary(executables: list[Executable]):
+def find_crosvm_binary(executables: List[Executable]):
     for executable in executables:
         if not executable.is_test and executable.cargo_target == "crosvm":
             return executable
diff --git a/tools/impl/test_target.py b/tools/impl/test_target.py
index 4c97321b90..b57dbb0ed1 100755
--- a/tools/impl/test_target.py
+++ b/tools/impl/test_target.py
@@ -5,7 +5,7 @@ import argparse
 import platform
 import subprocess
 from pathlib import Path
-from typing import Any, Literal, Optional, cast
+from typing import Any, Literal, Optional, cast, List, Dict
 import typing
 import sys
 from . import testvm
@@ -63,9 +63,9 @@ class Ssh:
     """Wrapper around subprocess to execute commands remotely via SSH."""
 
     hostname: str
-    opts: list[str]
+    opts: List[str]
 
-    def __init__(self, hostname: str, opts: list[str] = []):
+    def __init__(self, hostname: str, opts: List[str] = []):
         self.hostname = hostname
         self.opts = opts
 
@@ -95,9 +95,9 @@ class Ssh:
             check=True,
         ).stdout
 
-    def upload_files(self, files: list[Path], remote_dir: str = "", quiet: bool = False):
+    def upload_files(self, files: List[Path], remote_dir: str = "", quiet: bool = False):
         """Wrapper around SCP."""
-        flags: list[str] = []
+        flags: List[str] = []
         if quiet:
             flags.append("-q")
         scp_cmd = [
@@ -171,13 +171,13 @@ def find_rust_libs():
     yield from lib_dir.glob("libtest-*")
 
 
-def prepare_remote(ssh: Ssh, extra_files: list[Path] = []):
+def prepare_remote(ssh: Ssh, extra_files: List[Path] = []):
     print("Preparing remote")
     ssh.upload_files(list(find_rust_libs()) + extra_files)
     pass
 
 
-def prepare_target(target: TestTarget, extra_files: list[Path] = []):
+def prepare_target(target: TestTarget, extra_files: List[Path] = []):
     if target.vm:
         testvm.build_if_needed(target.vm)
         testvm.wait(target.vm)
@@ -204,7 +204,7 @@ def get_cargo_build_target(arch: Arch):
 
 def get_cargo_env(target: TestTarget, build_arch: Arch):
     """Environment variables to make cargo use the test target."""
-    env: dict[str, str] = BUILD_ENV.copy()
+    env: Dict[str, str] = BUILD_ENV.copy()
     cargo_target = get_cargo_build_target(build_arch)
     upper_target = cargo_target.upper().replace("-", "_")
     if build_arch != platform.machine():
@@ -215,7 +215,7 @@ def get_cargo_env(target: TestTarget, build_arch: Arch):
     return env
 
 
-def write_envrc(values: dict[str, str]):
+def write_envrc(values: Dict[str, str]):
     with open(ENVRC_PATH, "w") as file:
         for key, value in values.items():
             file.write(f'export {key}="{value}"\n')
@@ -234,8 +234,8 @@ def exec_file_on_target(
     target: TestTarget,
     filepath: Path,
     timeout: int,
-    args: list[str] = [],
-    extra_files: list[Path] = [],
+    args: List[str] = [],
+    extra_files: List[Path] = [],
     **kwargs: Any,
 ):
     """Executes a file on the test target.
@@ -290,9 +290,9 @@ def exec_file_on_target(
 def exec_file(
     target: TestTarget,
     filepath: Path,
-    args: list[str] = [],
+    args: List[str] = [],
     timeout: int = 60,
-    extra_files: list[Path] = [],
+    extra_files: List[Path] = [],
 ):
     if not filepath.exists():
         raise Exception(f"File does not exist: {filepath}")
diff --git a/tools/impl/testvm.py b/tools/impl/testvm.py
index 6d933aab9c..275cff464a 100755
--- a/tools/impl/testvm.py
+++ b/tools/impl/testvm.py
@@ -3,7 +3,7 @@
 # found in the LICENSE file.
 
 from pathlib import Path
-from typing import Iterable, Optional, Literal
+from typing import Iterable, Optional, Literal, Dict, List, Tuple
 import argparse
 import itertools
 import os
@@ -108,13 +108,13 @@ def rootfs_img_path(arch: Arch):
 
 
 # List of ports to use for SSH for each architecture
-SSH_PORTS: dict[Arch, int] = {
+SSH_PORTS: Dict[Arch, int] = {
     "x86_64": 9000,
     "aarch64": 9001,
 }
 
 # QEMU arguments shared by all architectures
-SHARED_ARGS: list[tuple[str, str]] = [
+SHARED_ARGS: List[Tuple[str, str]] = [
     ("-display", "none"),
     ("-device", "virtio-net-pci,netdev=net0"),
     ("-smp", "8"),
@@ -122,7 +122,7 @@ SHARED_ARGS: list[tuple[str, str]] = [
 ]
 
 # Arguments to QEMU for each architecture
-ARCH_TO_QEMU: dict[Arch, tuple[str, list[Iterable[str]]]] = {
+ARCH_TO_QEMU: Dict[Arch, Tuple[str, List[Iterable[str]]]] = {
     # arch: (qemu-binary, [(param, value), ...])
     "x86_64": (
         "qemu-system-x86_64",
@@ -150,7 +150,7 @@ ARCH_TO_QEMU: dict[Arch, tuple[str, list[Iterable[str]]]] = {
 }
 
 
-def ssh_opts(arch: Arch) -> dict[str, str]:
+def ssh_opts(arch: Arch) -> Dict[str, str]:
     return {
         "Port": str(SSH_PORTS[arch]),
         "User": "crosvm",
@@ -359,7 +359,7 @@ def clean(arch: Arch):
     shutil.rmtree(data_dir(arch))
 
 
-def main(arch: Arch, argv: list[str]):
+def main(arch: Arch, argv: List[str]):
     COMMANDS = [
         "build",
         "up",