diff --git a/test/pmb_test/const.py b/test/pmb_test/const.py
index 94d78171..ad219018 100644
--- a/test/pmb_test/const.py
+++ b/test/pmb_test/const.py
@@ -3,4 +3,4 @@
 import pmb.config
 
 
-testdata = pmb.config.pmb_src + "/test/testdata"
+testdata = pmb.config.pmb_src / "test/testdata"
diff --git a/test/pmb_test/git.py b/test/pmb_test/git.py
index 76667641..b4112cce 100644
--- a/test/pmb_test/git.py
+++ b/test/pmb_test/git.py
@@ -64,4 +64,4 @@ def prepare_tmpdir(args: PmbArgs, monkeypatch, tmpdir):
     return path_local, run_git
 
 def copy_dotgit(args: PmbArgs, tmpdir):
-    shutil.copytree(args.aports + "/.git", tmpdir + "/.git", ignore_dangling_symlinks=True)
+    shutil.copytree(args.aports / ".git", tmpdir + "/.git", ignore_dangling_symlinks=True)
diff --git a/test/test_apk.py b/test/test_apk.py
index ee8b5f72..2ca648f0 100644
--- a/test/test_apk.py
+++ b/test/test_apk.py
@@ -1,14 +1,18 @@
 # Copyright 2023 Oliver Smith
 # SPDX-License-Identifier: GPL-3.0-or-later
 import fnmatch
+from typing import List
 import pytest
 import sys
 
+from pmb.core.types import PathString
 import pmb_test  # noqa
 import pmb.build
 import pmb.chroot.apk
 from pmb.core import Chroot
 
+cmds_progress: List[PathString] = []
+cmds: List[PathString] = []
 
 @pytest.fixture
 def args(tmpdir, request):
diff --git a/test/test_apk_static.py b/test/test_apk_static.py
index 6d5987b8..9b53dd7b 100644
--- a/test/test_apk_static.py
+++ b/test/test_apk_static.py
@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 import os
 import copy
+from pathlib import Path
 import sys
 import tarfile
 import glob
@@ -28,42 +29,42 @@ def args(request):
 
 def test_read_signature_info(args: PmbArgs):
     # Tempfolder inside chroot for fake apk files
-    tmp_path = "/tmp/test_read_signature_info"
-    tmp_path_outside = pmb.config.work / "chroot_native" + tmp_path
+    tmp_path = Path("/tmp/test_read_signature_info")
+    tmp_path_outside = pmb.config.work / "chroot_native" / tmp_path
     if os.path.exists(tmp_path_outside):
         pmb.chroot.root(args, ["rm", "-r", tmp_path])
     pmb.chroot.user(args, ["mkdir", "-p", tmp_path])
 
     # No signature found
-    pmb.chroot.user(args, ["tar", "-czf", tmp_path + "/no_sig.apk",
+    pmb.chroot.user(args, ["tar", "-czf", tmp_path / "no_sig.apk",
                            "/etc/issue"])
-    with tarfile.open(tmp_path_outside + "/no_sig.apk", "r:gz") as tar:
+    with tarfile.open(tmp_path_outside / "no_sig.apk", "r:gz") as tar:
         with pytest.raises(RuntimeError) as e:
             pmb.chroot.apk_static.read_signature_info(tar)
         assert "Could not find signature" in str(e.value)
 
     # Signature file with invalid name
-    pmb.chroot.user(args, ["mkdir", "-p", tmp_path + "/sbin"])
-    pmb.chroot.user(args, ["cp", "/etc/issue", tmp_path +
-                           "/sbin/apk.static.SIGN.RSA.invalid.pub"])
-    pmb.chroot.user(args, ["tar", "-czf", tmp_path + "/invalid_sig.apk",
+    pmb.chroot.user(args, ["mkdir", "-p", tmp_path / "sbin"])
+    pmb.chroot.user(args, ["cp", "/etc/issue", tmp_path /
+                           "sbin/apk.static.SIGN.RSA.invalid.pub"])
+    pmb.chroot.user(args, ["tar", "-czf", tmp_path / "invalid_sig.apk",
                            "sbin/apk.static.SIGN.RSA.invalid.pub"],
                     working_dir=tmp_path)
-    with tarfile.open(tmp_path_outside + "/invalid_sig.apk", "r:gz") as tar:
+    with tarfile.open(tmp_path_outside / "invalid_sig.apk", "r:gz") as tar:
         with pytest.raises(RuntimeError) as e:
             pmb.chroot.apk_static.read_signature_info(tar)
         assert "Invalid signature key" in str(e.value)
 
     # Signature file with realistic name
-    path = glob.glob(pmb.config.apk_keys_path + "/*.pub")[0]
+    path = list(pmb.config.apk_keys_path.glob("/*.pub"))[0]
     name = os.path.basename(path)
     path_archive = "sbin/apk.static.SIGN.RSA." + name
     pmb.chroot.user(args, ["mv",
-                           f"{tmp_path}/sbin/apk.static.SIGN.RSA.invalid.pub",
-                           f"{tmp_path}/{path_archive}"])
-    pmb.chroot.user(args, ["tar", "-czf", tmp_path + "/realistic_name_sig.apk",
+                           tmp_path / "sbin/apk.static.SIGN.RSA.invalid.pub",
+                           tmp_path / path_archive])
+    pmb.chroot.user(args, ["tar", "-czf", tmp_path / "realistic_name_sig.apk",
                            path_archive], working_dir=tmp_path)
-    with tarfile.open(f"{tmp_path_outside}/realistic_name_sig.apk", "r:gz")\
+    with tarfile.open(tmp_path_outside / "realistic_name_sig.apk", "r:gz")\
             as tar:
         sigfilename, sigkey_path = pmb.chroot.apk_static.read_signature_info(
             tar)
diff --git a/test/test_shell_escape.py b/test/test_shell_escape.py
index 5055b290..d27286ab 100644
--- a/test/test_shell_escape.py
+++ b/test/test_shell_escape.py
@@ -1,7 +1,8 @@
 # Copyright 2023 Oliver Smith
 # SPDX-License-Identifier: GPL-3.0-or-later
 import sys
-from pmb.core.types import PmbArgs
+from typing import Any
+from pmb.core.types import Env, PmbArgs
 import pytest
 
 import pmb_test  # noqa
@@ -58,12 +59,12 @@ def test_shell_escape(args: PmbArgs):
 def test_shell_escape_env(args: PmbArgs):
     key = "PMBOOTSTRAP_TEST_ENVIRONMENT_VARIABLE"
     value = "long value with spaces and special characters: '\"\\!$test"
-    env = {key: value}
+    env: Env = {key: value}
     cmd = ["sh", "-c", "env | grep " + key + " | grep -v SUDO_COMMAND"]
     ret = key + "=" + value + "\n"
 
     copy = list(cmd)
-    func = pmb.helpers.run.user
+    func: Any = pmb.helpers.run.user
     assert func(args, cmd, output_return=True, env=env) == ret
     assert cmd == copy
 
@@ -83,34 +84,30 @@ def test_shell_escape_env(args: PmbArgs):
 def test_flat_cmd_simple():
     func = pmb.helpers.run_core.flat_cmd
     cmd = ["echo", "test"]
-    working_dir = None
     ret = "echo test"
-    env = {}
-    assert func(cmd, working_dir, env) == ret
+    env: Env = {}
+    assert func(cmd, env=env) == ret
 
 
 def test_flat_cmd_wrap_shell_string_with_spaces():
     func = pmb.helpers.run_core.flat_cmd
     cmd = ["echo", "string with spaces"]
-    working_dir = None
     ret = "echo 'string with spaces'"
-    env = {}
-    assert func(cmd, working_dir, env) == ret
+    env: Env = {}
+    assert func(cmd, env=env) == ret
 
 
 def test_flat_cmd_wrap_env_simple():
     func = pmb.helpers.run_core.flat_cmd
     cmd = ["echo", "test"]
-    working_dir = None
     ret = "JOBS=5 echo test"
-    env = {"JOBS": "5"}
-    assert func(cmd, working_dir, env) == ret
+    env: Env = {"JOBS": "5"}
+    assert func(cmd, env=env) == ret
 
 
 def test_flat_cmd_wrap_env_spaces():
     func = pmb.helpers.run_core.flat_cmd
     cmd = ["echo", "test"]
-    working_dir = None
     ret = "JOBS=5 TEST='spaces string' echo test"
-    env = {"JOBS": "5", "TEST": "spaces string"}
-    assert func(cmd, working_dir, env) == ret
+    env: Env = {"JOBS": "5", "TEST": "spaces string"}
+    assert func(cmd, env=env) == ret