diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f4c524e..4b5aaad 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -84,22 +84,6 @@ jobs:
       - name: Configure poetry
         run: poetry config virtualenvs.in-project true
 
-      - name: Setup cache
-        uses: actions/cache@v4
-        id: cache
-        with:
-          path: .venv
-          key: venv-${{ runner.os }}-${{ matrix.qt-version }}-${{ steps.full-python-version.outputs.version }}-${{ hashFiles('**/poetry.lock') }}
-
-      - name: Valdate cache
-        if: steps.cache.outputs.cache-hit == 'true'
-        run: |
-          # `timeout` is not available on macos, so we define a custom function.
-          [ "$(command -v timeout)" ] || function timeout() { perl -e 'alarm shift; exec @ARGV' "$@"; }
-
-          # Using `timeout` is a safeguard against the Poetry command hanging for some reason.
-          timeout 10s poetry run pip --version || rm -rf .venv
-
       - name: Check lock file
         run: poetry check --lock
 
@@ -110,7 +94,7 @@ jobs:
       #   run: poetry run mypy
 
       - name: Install Qt
-        run: poetry run pip install --ignore-installed ${{ matrix.qt-version }}
+        run: poetry run pip install ${{ matrix.qt-version }}
 
       - name: Install libxcb dependencies
         if: ${{ matrix.os == 'ubuntu' }}
diff --git a/.gitignore b/.gitignore
index 3c2c7d9..c4f71db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,6 +21,9 @@ _build
 .cache
 *.so
 
+# coverage
+.coverage.*.*.*
+
 # logs
 pip-log.txt
 
diff --git a/poetry.lock b/poetry.lock
index 1ee212c..f86b975 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.4 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.1.3 and should not be changed by hand.
 
 [[package]]
 name = "cfgv"
@@ -6,6 +6,7 @@ version = "3.4.0"
 description = "Validate configuration and produce human readable error messages."
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "cfgv-3.4.0-py2.py3-none-any.whl", hash = "sha256:b7265b1f29fd3316bfcd2b330d63d024f2bfd8bcb8b0272f8e19a504856c48f9"},
     {file = "cfgv-3.4.0.tar.gz", hash = "sha256:e52591d4c5f5dead8e0f673fb16db7949d2cfb3f7da4582893288f0ded8fe560"},
@@ -17,6 +18,8 @@ version = "0.4.6"
 description = "Cross-platform colored terminal text."
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
+groups = ["github-actions", "test"]
+markers = "sys_platform == \"win32\""
 files = [
     {file = "colorama-0.4.6-py2.py3-none-any.whl", hash = "sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6"},
     {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
@@ -28,6 +31,8 @@ version = "7.6.1"
 description = "Code coverage measurement for Python"
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "test"]
+markers = "python_version == \"3.8\""
 files = [
     {file = "coverage-7.6.1-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:b06079abebbc0e89e6163b8e8f0e16270124c154dc6e4a47b413dd538859af16"},
     {file = "coverage-7.6.1-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:cf4b19715bccd7ee27b6b120e7e9dd56037b9c0681dcc1adc9ba9db3d417fa36"},
@@ -107,7 +112,7 @@ files = [
 tomli = {version = "*", optional = true, markers = "python_full_version <= \"3.11.0a6\" and extra == \"toml\""}
 
 [package.extras]
-toml = ["tomli"]
+toml = ["tomli ; python_full_version <= \"3.11.0a6\""]
 
 [[package]]
 name = "coverage"
@@ -115,6 +120,8 @@ version = "7.9.2"
 description = "Code coverage measurement for Python"
 optional = false
 python-versions = ">=3.9"
+groups = ["main", "test"]
+markers = "python_version >= \"3.9\""
 files = [
     {file = "coverage-7.9.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:66283a192a14a3854b2e7f3418d7db05cdf411012ab7ff5db98ff3b181e1f912"},
     {file = "coverage-7.9.2-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:4e01d138540ef34fcf35c1aa24d06c3de2a4cffa349e29a10056544f35cca15f"},
@@ -189,7 +196,24 @@ files = [
 tomli = {version = "*", optional = true, markers = "python_full_version <= \"3.11.0a6\" and extra == \"toml\""}
 
 [package.extras]
-toml = ["tomli"]
+toml = ["tomli ; python_full_version <= \"3.11.0a6\""]
+
+[[package]]
+name = "coverage-conditional-plugin"
+version = "0.9.0"
+description = "Conditional coverage based on any rules you define!"
+optional = false
+python-versions = ">=3.7,<4.0"
+groups = ["main"]
+files = [
+    {file = "coverage_conditional_plugin-0.9.0-py3-none-any.whl", hash = "sha256:1b37bc469019d2ab5b01f5eee453abe1846b3431e64e209720c2a9ec4afb8130"},
+    {file = "coverage_conditional_plugin-0.9.0.tar.gz", hash = "sha256:6893dab0542695dbd5ea714281dae0dfec8d0e36480ba32d839e9fa7344f8215"},
+]
+
+[package.dependencies]
+coverage = ">=7,<8"
+importlib_metadata = {version = "*", markers = "python_version < \"3.10\""}
+packaging = ">=20.4"
 
 [[package]]
 name = "distlib"
@@ -197,6 +221,7 @@ version = "0.4.0"
 description = "Distribution utilities"
 optional = false
 python-versions = "*"
+groups = ["dev"]
 files = [
     {file = "distlib-0.4.0-py2.py3-none-any.whl", hash = "sha256:9659f7d87e46584a30b5780e43ac7a2143098441670ff0a49d5f9034c54a6c16"},
     {file = "distlib-0.4.0.tar.gz", hash = "sha256:feec40075be03a04501a973d81f633735b4b69f98b05450592310c0f401a4e0d"},
@@ -208,6 +233,8 @@ version = "1.3.0"
 description = "Backport of PEP 654 (exception groups)"
 optional = false
 python-versions = ">=3.7"
+groups = ["github-actions", "test"]
+markers = "python_version < \"3.11\""
 files = [
     {file = "exceptiongroup-1.3.0-py3-none-any.whl", hash = "sha256:4d111e6e0c13d0644cad6ddaa7ed0261a0b36971f6d23e7ec9b4b9097da78a10"},
     {file = "exceptiongroup-1.3.0.tar.gz", hash = "sha256:b241f5885f560bc56a59ee63ca4c6a8bfa46ae4ad651af316d4e81817bb9fd88"},
@@ -225,6 +252,7 @@ version = "2.1.1"
 description = "execnet: rapid multi-Python deployment"
 optional = false
 python-versions = ">=3.8"
+groups = ["test"]
 files = [
     {file = "execnet-2.1.1-py3-none-any.whl", hash = "sha256:26dee51f1b80cebd6d0ca8e74dd8745419761d3bef34163928cbebbdc4749fdc"},
     {file = "execnet-2.1.1.tar.gz", hash = "sha256:5189b52c6121c24feae288166ab41b32549c7e2348652736540b9e6e7d4e72e3"},
@@ -239,6 +267,7 @@ version = "3.16.1"
 description = "A platform independent file lock."
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "filelock-3.16.1-py3-none-any.whl", hash = "sha256:2082e5703d51fbf98ea75855d9d5527e33d8ff23099bec374a134febee6946b0"},
     {file = "filelock-3.16.1.tar.gz", hash = "sha256:c249fbfcd5db47e5e2d6d62198e565475ee65e4831e2561c8e313fa7eb961435"},
@@ -247,7 +276,7 @@ files = [
 [package.extras]
 docs = ["furo (>=2024.8.6)", "sphinx (>=8.0.2)", "sphinx-autodoc-typehints (>=2.4.1)"]
 testing = ["covdefaults (>=2.3)", "coverage (>=7.6.1)", "diff-cover (>=9.2)", "pytest (>=8.3.3)", "pytest-asyncio (>=0.24)", "pytest-cov (>=5)", "pytest-mock (>=3.14)", "pytest-timeout (>=2.3.1)", "virtualenv (>=20.26.4)"]
-typing = ["typing-extensions (>=4.12.2)"]
+typing = ["typing-extensions (>=4.12.2) ; python_version < \"3.11\""]
 
 [[package]]
 name = "identify"
@@ -255,6 +284,7 @@ version = "2.6.1"
 description = "File identification library for Python"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "identify-2.6.1-py2.py3-none-any.whl", hash = "sha256:53863bcac7caf8d2ed85bd20312ea5dcfc22226800f6d6881f232d861db5a8f0"},
     {file = "identify-2.6.1.tar.gz", hash = "sha256:91478c5fb7c3aac5ff7bf9b4344f803843dc586832d5f110d672b19aa1984c98"},
@@ -263,12 +293,63 @@ files = [
 [package.extras]
 license = ["ukkonen"]
 
+[[package]]
+name = "importlib-metadata"
+version = "8.5.0"
+description = "Read metadata from Python packages"
+optional = false
+python-versions = ">=3.8"
+groups = ["main"]
+markers = "python_version == \"3.8\""
+files = [
+    {file = "importlib_metadata-8.5.0-py3-none-any.whl", hash = "sha256:45e54197d28b7a7f1559e60b95e7c567032b602131fbd588f1497f47880aa68b"},
+    {file = "importlib_metadata-8.5.0.tar.gz", hash = "sha256:71522656f0abace1d072b9e5481a48f07c138e00f079c38c8f883823f9c26bd7"},
+]
+
+[package.dependencies]
+zipp = ">=3.20"
+
+[package.extras]
+check = ["pytest-checkdocs (>=2.4)", "pytest-ruff (>=0.2.1) ; sys_platform != \"cygwin\""]
+cover = ["pytest-cov"]
+doc = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
+enabler = ["pytest-enabler (>=2.2)"]
+perf = ["ipython"]
+test = ["flufl.flake8", "importlib-resources (>=1.3) ; python_version < \"3.9\"", "jaraco.test (>=5.4)", "packaging", "pyfakefs", "pytest (>=6,!=8.1.*)", "pytest-perf (>=0.9.2)"]
+type = ["pytest-mypy"]
+
+[[package]]
+name = "importlib-metadata"
+version = "8.7.0"
+description = "Read metadata from Python packages"
+optional = false
+python-versions = ">=3.9"
+groups = ["main"]
+markers = "python_version == \"3.9\""
+files = [
+    {file = "importlib_metadata-8.7.0-py3-none-any.whl", hash = "sha256:e5dd1551894c77868a30651cef00984d50e1002d06942a7101d34870c5f02afd"},
+    {file = "importlib_metadata-8.7.0.tar.gz", hash = "sha256:d13b81ad223b890aa16c5471f2ac3056cf76c5f10f82d6f9292f0b415f389000"},
+]
+
+[package.dependencies]
+zipp = ">=3.20"
+
+[package.extras]
+check = ["pytest-checkdocs (>=2.4)", "pytest-ruff (>=0.2.1) ; sys_platform != \"cygwin\""]
+cover = ["pytest-cov"]
+doc = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
+enabler = ["pytest-enabler (>=2.2)"]
+perf = ["ipython"]
+test = ["flufl.flake8", "importlib_resources (>=1.3) ; python_version < \"3.9\"", "jaraco.test (>=5.4)", "packaging", "pyfakefs", "pytest (>=6,!=8.1.*)", "pytest-perf (>=0.9.2)"]
+type = ["pytest-mypy"]
+
 [[package]]
 name = "iniconfig"
 version = "2.1.0"
 description = "brain-dead simple config-ini parsing"
 optional = false
 python-versions = ">=3.8"
+groups = ["github-actions", "test"]
 files = [
     {file = "iniconfig-2.1.0-py3-none-any.whl", hash = "sha256:9deba5723312380e77435581c6bf4935c94cbfab9b1ed33ef8d238ea168eb760"},
     {file = "iniconfig-2.1.0.tar.gz", hash = "sha256:3abbd2e30b36733fee78f9c7f7308f2d0050e88f0087fd25c2645f63c773e1c7"},
@@ -280,6 +361,7 @@ version = "1.14.1"
 description = "Optional static typing for Python"
 optional = false
 python-versions = ">=3.8"
+groups = ["typing"]
 files = [
     {file = "mypy-1.14.1-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:52686e37cf13d559f668aa398dd7ddf1f92c5d613e4f8cb262be2fb4fedb0fcb"},
     {file = "mypy-1.14.1-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:1fb545ca340537d4b45d3eecdb3def05e913299ca72c290326be19b3804b39c0"},
@@ -339,6 +421,7 @@ version = "1.1.0"
 description = "Type system extensions for programs checked with the mypy type checker."
 optional = false
 python-versions = ">=3.8"
+groups = ["typing"]
 files = [
     {file = "mypy_extensions-1.1.0-py3-none-any.whl", hash = "sha256:1be4cccdb0f2482337c4743e60421de3a356cd97508abadd57d47403e94f5505"},
     {file = "mypy_extensions-1.1.0.tar.gz", hash = "sha256:52e68efc3284861e772bbcd66823fde5ae21fd2fdb51c62a211403730b916558"},
@@ -350,6 +433,7 @@ version = "1.9.1"
 description = "Node.js virtual environment builder"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
+groups = ["dev"]
 files = [
     {file = "nodeenv-1.9.1-py2.py3-none-any.whl", hash = "sha256:ba11c9782d29c27c70ffbdda2d7415098754709be8a7056d79a737cd901155c9"},
     {file = "nodeenv-1.9.1.tar.gz", hash = "sha256:6ec12890a2dab7946721edbfbcd91f3319c6ccc9aec47be7c7e6b7011ee6645f"},
@@ -361,6 +445,7 @@ version = "25.0"
 description = "Core utilities for Python packages"
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "github-actions", "test"]
 files = [
     {file = "packaging-25.0-py3-none-any.whl", hash = "sha256:29572ef2b1f17581046b3a2227d5c611fb25ec70ca1ba8554b24b0e69331a484"},
     {file = "packaging-25.0.tar.gz", hash = "sha256:d443872c98d677bf60f6a1f2f8c1cb748e8fe762d2bf9d3148b5599295b0fc4f"},
@@ -372,6 +457,7 @@ version = "4.3.6"
 description = "A small Python package for determining appropriate platform-specific dirs, e.g. a `user data dir`."
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "platformdirs-4.3.6-py3-none-any.whl", hash = "sha256:73e575e1408ab8103900836b97580d5307456908a03e92031bab39e4554cc3fb"},
     {file = "platformdirs-4.3.6.tar.gz", hash = "sha256:357fb2acbc885b0419afd3ce3ed34564c13c9b95c89360cd9563f73aa5e2b907"},
@@ -388,6 +474,8 @@ version = "1.5.0"
 description = "plugin and hook calling mechanisms for python"
 optional = false
 python-versions = ">=3.8"
+groups = ["github-actions", "test"]
+markers = "python_version == \"3.8\""
 files = [
     {file = "pluggy-1.5.0-py3-none-any.whl", hash = "sha256:44e1ad92c8ca002de6377e165f3e0f1be63266ab4d554740532335b9d75ea669"},
     {file = "pluggy-1.5.0.tar.gz", hash = "sha256:2cffa88e94fdc978c4c574f15f9e59b7f4201d439195c3715ca9e2486f1d0cf1"},
@@ -403,6 +491,8 @@ version = "1.6.0"
 description = "plugin and hook calling mechanisms for python"
 optional = false
 python-versions = ">=3.9"
+groups = ["github-actions", "test"]
+markers = "python_version >= \"3.9\""
 files = [
     {file = "pluggy-1.6.0-py3-none-any.whl", hash = "sha256:e920276dd6813095e9377c0bc5566d94c932c33b27a3e3945d8389c374dd4746"},
     {file = "pluggy-1.6.0.tar.gz", hash = "sha256:7dcc130b76258d33b90f61b658791dede3486c3e6bfb003ee5c9bfb396dd22f3"},
@@ -418,6 +508,7 @@ version = "2.21.0"
 description = "A framework for managing and maintaining multi-language pre-commit hooks."
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "pre_commit-2.21.0-py2.py3-none-any.whl", hash = "sha256:e2f91727039fc39a92f58a588a25b87f936de6567eed4f0e673e0507edc75bad"},
     {file = "pre_commit-2.21.0.tar.gz", hash = "sha256:31ef31af7e474a8d8995027fefdfcf509b5c913ff31f2015b4ec4beb26a6f658"},
@@ -436,6 +527,7 @@ version = "7.0.0"
 description = "Cross-platform lib for process and system monitoring in Python.  NOTE: the syntax of this script MUST be kept compatible with Python 2.7."
 optional = false
 python-versions = ">=3.6"
+groups = ["test"]
 files = [
     {file = "psutil-7.0.0-cp36-abi3-macosx_10_9_x86_64.whl", hash = "sha256:101d71dc322e3cffd7cea0650b09b3d08b8e7c4109dd6809fe452dfd00e58b25"},
     {file = "psutil-7.0.0-cp36-abi3-macosx_11_0_arm64.whl", hash = "sha256:39db632f6bb862eeccf56660871433e111b6ea58f2caea825571951d4b6aa3da"},
@@ -459,6 +551,8 @@ version = "2.19.2"
 description = "Pygments is a syntax highlighting package written in Python."
 optional = false
 python-versions = ">=3.8"
+groups = ["github-actions", "test"]
+markers = "python_version >= \"3.9\""
 files = [
     {file = "pygments-2.19.2-py3-none-any.whl", hash = "sha256:86540386c03d588bb81d44bc3928634ff26449851e99741617ecb9037ee5ec0b"},
     {file = "pygments-2.19.2.tar.gz", hash = "sha256:636cb2477cec7f8952536970bc533bc43743542f70392ae026374600add5b887"},
@@ -473,6 +567,8 @@ version = "7.4.4"
 description = "pytest: simple powerful testing with Python"
 optional = false
 python-versions = ">=3.7"
+groups = ["github-actions", "test"]
+markers = "python_version == \"3.8\""
 files = [
     {file = "pytest-7.4.4-py3-none-any.whl", hash = "sha256:b090cdf5ed60bf4c45261be03239c2c1c22df034fbffe691abe93cd80cea01d8"},
     {file = "pytest-7.4.4.tar.gz", hash = "sha256:2cf0005922c6ace4a3e2ec8b4080eb0d9753fdc93107415332f50ce9e7994280"},
@@ -495,6 +591,8 @@ version = "8.4.1"
 description = "pytest: simple powerful testing with Python"
 optional = false
 python-versions = ">=3.9"
+groups = ["github-actions", "test"]
+markers = "python_version >= \"3.9\""
 files = [
     {file = "pytest-8.4.1-py3-none-any.whl", hash = "sha256:539c70ba6fcead8e78eebbf1115e8b589e7565830d7d006a8723f19ac8a0afb7"},
     {file = "pytest-8.4.1.tar.gz", hash = "sha256:7c67fd69174877359ed9371ec3af8a3d2b04741818c51e5e99cc1742251fa93c"},
@@ -518,6 +616,8 @@ version = "4.1.0"
 description = "Pytest plugin for measuring coverage."
 optional = false
 python-versions = ">=3.7"
+groups = ["test"]
+markers = "python_version == \"3.8\""
 files = [
     {file = "pytest-cov-4.1.0.tar.gz", hash = "sha256:3904b13dfbfec47f003b8e77fd5b589cd11904a21ddf1ab38a64f204d6a10ef6"},
     {file = "pytest_cov-4.1.0-py3-none-any.whl", hash = "sha256:6ba70b9e97e69fcc3fb45bfeab2d0a138fb65c4d0d6a41ef33983ad114be8c3a"},
@@ -536,6 +636,8 @@ version = "6.2.1"
 description = "Pytest plugin for measuring coverage."
 optional = false
 python-versions = ">=3.9"
+groups = ["test"]
+markers = "python_version >= \"3.9\""
 files = [
     {file = "pytest_cov-6.2.1-py3-none-any.whl", hash = "sha256:f5bc4c23f42f1cdd23c70b1dab1bbaef4fc505ba950d53e0081d0730dd7e86d5"},
     {file = "pytest_cov-6.2.1.tar.gz", hash = "sha256:25cc6cc0a5358204b8108ecedc51a9b57b34cc6b8c967cc2c01a4e00d8a67da2"},
@@ -555,6 +657,7 @@ version = "0.1.8"
 description = "pytest plugin to annotate failed tests with a workflow command for GitHub Actions"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*"
+groups = ["github-actions"]
 files = [
     {file = "pytest-github-actions-annotate-failures-0.1.8.tar.gz", hash = "sha256:2d6e6cb5f8d0aae4a27a20cc4e20fabd3199a121c57f44bc48fe28e372e0be23"},
     {file = "pytest_github_actions_annotate_failures-0.1.8-py2.py3-none-any.whl", hash = "sha256:6a882ff21672fa79deae8d917eb965a6bde2b25191e7632e1adfc23ffac008ab"},
@@ -569,6 +672,8 @@ version = "3.6.1"
 description = "pytest xdist plugin for distributed testing, most importantly across multiple CPUs"
 optional = false
 python-versions = ">=3.8"
+groups = ["test"]
+markers = "python_version == \"3.8\""
 files = [
     {file = "pytest_xdist-3.6.1-py3-none-any.whl", hash = "sha256:9ed4adfb68a016610848639bb7e02c9352d5d9f03d04809919e2dafc3be4cca7"},
     {file = "pytest_xdist-3.6.1.tar.gz", hash = "sha256:ead156a4db231eec769737f57668ef58a2084a34b2e55c4a8fa20d861107300d"},
@@ -590,6 +695,8 @@ version = "3.8.0"
 description = "pytest xdist plugin for distributed testing, most importantly across multiple CPUs"
 optional = false
 python-versions = ">=3.9"
+groups = ["test"]
+markers = "python_version >= \"3.9\""
 files = [
     {file = "pytest_xdist-3.8.0-py3-none-any.whl", hash = "sha256:202ca578cfeb7370784a8c33d6d05bc6e13b4f25b5053c30a152269fd10f0b88"},
     {file = "pytest_xdist-3.8.0.tar.gz", hash = "sha256:7e578125ec9bc6050861aa93f2d59f1d8d085595d6551c2c90b6f4fad8d3a9f1"},
@@ -611,6 +718,7 @@ version = "6.0.2"
 description = "YAML parser and emitter for Python"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "PyYAML-6.0.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:0a9a2848a5b7feac301353437eb7d5957887edbf81d56e903999a75a3d743086"},
     {file = "PyYAML-6.0.2-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:29717114e51c84ddfba879543fb232a6ed60086602313ca38cce623c1d62cfbf"},
@@ -673,6 +781,7 @@ version = "2.2.1"
 description = "A lil' TOML parser"
 optional = false
 python-versions = ">=3.8"
+groups = ["github-actions", "test", "typing"]
 files = [
     {file = "tomli-2.2.1-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:678e4fa69e4575eb77d103de3df8a895e1591b48e740211bd1067378c69e8249"},
     {file = "tomli-2.2.1-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:023aa114dd824ade0100497eb2318602af309e5a55595f76b626d6d9f3b7b0a6"},
@@ -707,6 +816,7 @@ files = [
     {file = "tomli-2.2.1-py3-none-any.whl", hash = "sha256:cb55c73c5f4408779d0cf3eef9f762b9c9f147a77de7b258bef0a5628adc85cc"},
     {file = "tomli-2.2.1.tar.gz", hash = "sha256:cd45e1dc79c835ce60f7404ec8119f2eb06d38b1deba146f07ced3bbc44505ff"},
 ]
+markers = {github-actions = "python_version < \"3.11\"", test = "python_full_version <= \"3.11.0a6\"", typing = "python_version < \"3.11\""}
 
 [[package]]
 name = "typing-extensions"
@@ -714,10 +824,12 @@ version = "4.13.2"
 description = "Backported and Experimental Type Hints for Python 3.8+"
 optional = false
 python-versions = ">=3.8"
+groups = ["github-actions", "test", "typing"]
 files = [
     {file = "typing_extensions-4.13.2-py3-none-any.whl", hash = "sha256:a439e7c04b49fec3e5d3e2beaa21755cadbbdc391694e28ccdd36ca4a1408f8c"},
     {file = "typing_extensions-4.13.2.tar.gz", hash = "sha256:e6c81219bd689f51865d9e372991c540bda33a0379d5573cddb9a3a23f7caaef"},
 ]
+markers = {github-actions = "python_version < \"3.11\"", test = "python_version < \"3.11\""}
 
 [[package]]
 name = "virtualenv"
@@ -725,6 +837,7 @@ version = "20.32.0"
 description = "Virtual Python Environment builder"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "virtualenv-20.32.0-py3-none-any.whl", hash = "sha256:2c310aecb62e5aa1b06103ed7c2977b81e042695de2697d01017ff0f1034af56"},
     {file = "virtualenv-20.32.0.tar.gz", hash = "sha256:886bf75cadfdc964674e6e33eb74d787dff31ca314ceace03ca5810620f4ecf0"},
@@ -737,9 +850,51 @@ platformdirs = ">=3.9.1,<5"
 
 [package.extras]
 docs = ["furo (>=2023.7.26)", "proselint (>=0.13)", "sphinx (>=7.1.2,!=7.3)", "sphinx-argparse (>=0.4)", "sphinxcontrib-towncrier (>=0.2.1a0)", "towncrier (>=23.6)"]
-test = ["covdefaults (>=2.3)", "coverage (>=7.2.7)", "coverage-enable-subprocess (>=1)", "flaky (>=3.7)", "packaging (>=23.1)", "pytest (>=7.4)", "pytest-env (>=0.8.2)", "pytest-freezer (>=0.4.8)", "pytest-mock (>=3.11.1)", "pytest-randomly (>=3.12)", "pytest-timeout (>=2.1)", "setuptools (>=68)", "time-machine (>=2.10)"]
+test = ["covdefaults (>=2.3)", "coverage (>=7.2.7)", "coverage-enable-subprocess (>=1)", "flaky (>=3.7)", "packaging (>=23.1)", "pytest (>=7.4)", "pytest-env (>=0.8.2)", "pytest-freezer (>=0.4.8) ; platform_python_implementation == \"PyPy\" or platform_python_implementation == \"GraalVM\" or platform_python_implementation == \"CPython\" and sys_platform == \"win32\" and python_version >= \"3.13\"", "pytest-mock (>=3.11.1)", "pytest-randomly (>=3.12)", "pytest-timeout (>=2.1)", "setuptools (>=68)", "time-machine (>=2.10) ; platform_python_implementation == \"CPython\""]
+
+[[package]]
+name = "zipp"
+version = "3.20.2"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+optional = false
+python-versions = ">=3.8"
+groups = ["main"]
+markers = "python_version == \"3.8\""
+files = [
+    {file = "zipp-3.20.2-py3-none-any.whl", hash = "sha256:a817ac80d6cf4b23bf7f2828b7cabf326f15a001bea8b1f9b49631780ba28350"},
+    {file = "zipp-3.20.2.tar.gz", hash = "sha256:bc9eb26f4506fda01b81bcde0ca78103b6e62f991b381fec825435c836edbc29"},
+]
+
+[package.extras]
+check = ["pytest-checkdocs (>=2.4)", "pytest-ruff (>=0.2.1) ; sys_platform != \"cygwin\""]
+cover = ["pytest-cov"]
+doc = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
+enabler = ["pytest-enabler (>=2.2)"]
+test = ["big-O", "importlib-resources ; python_version < \"3.9\"", "jaraco.functools", "jaraco.itertools", "jaraco.test", "more-itertools", "pytest (>=6,!=8.1.*)", "pytest-ignore-flaky"]
+type = ["pytest-mypy"]
+
+[[package]]
+name = "zipp"
+version = "3.23.0"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+optional = false
+python-versions = ">=3.9"
+groups = ["main"]
+markers = "python_version == \"3.9\""
+files = [
+    {file = "zipp-3.23.0-py3-none-any.whl", hash = "sha256:071652d6115ed432f5ce1d34c336c0adfd6a884660d1e9712a256d3d3bd4b14e"},
+    {file = "zipp-3.23.0.tar.gz", hash = "sha256:a07157588a12518c9d4034df3fbbee09c814741a33ff63c05fa29d26a2404166"},
+]
+
+[package.extras]
+check = ["pytest-checkdocs (>=2.4)", "pytest-ruff (>=0.2.1) ; sys_platform != \"cygwin\""]
+cover = ["pytest-cov"]
+doc = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
+enabler = ["pytest-enabler (>=2.2)"]
+test = ["big-O", "jaraco.functools", "jaraco.itertools", "jaraco.test", "more_itertools", "pytest (>=6,!=8.1.*)", "pytest-ignore-flaky"]
+type = ["pytest-mypy"]
 
 [metadata]
-lock-version = "2.0"
+lock-version = "2.1"
 python-versions = ">=3.8, <3.14"
-content-hash = "cd4e67d6922656043998215f2bf2f6e60e3db66777c6b82d4fdc2f1935d75dfd"
+content-hash = "e95f4cd60bc0cf82a6b3c7b8f6b9c2ae3470331912831c90821ced668c18e86b"
diff --git a/pyproject.toml b/pyproject.toml
index 519ef49..3950377 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,6 +30,7 @@ classifiers = [
 
 [tool.poetry.dependencies]
 python = ">=3.8, <3.14"
+coverage-conditional-plugin = ">=0.9.0"  # known to work with this version
 
 [tool.poetry.group.dev.dependencies]
 pre-commit = "^2.21"
@@ -65,3 +66,19 @@ build-backend = "poetry.core.masonry.api"
 addopts = "-n auto"
 markers = ["raises"]
 testpaths = ["tests"]
+
+[tool.coverage.run]
+plugins = ["coverage_conditional_plugin"]
+
+[tool.coverage.coverage_conditional_plugin.omit]
+"sys_platform == 'win32'" = "qasync/_unix.py"
+"sys_platform != 'win32'" = "qasync/_windows.py"
+
+[tool.coverage.coverage_conditional_plugin.rules]
+no_cover_if_windows = "sys_platform == 'win32'"
+no_cover_if_unix = "sys_platform != 'win32'"
+no_cover_if_lt312 = "sys_version_info < (3, 12, 0)"
+no_cover_if_geq312 = "sys_version_info >= (3, 12, 0)"
+
+[tool.coverage.report]
+show_missing = true
diff --git a/qasync/__init__.py b/qasync/__init__.py
index 176ed04..135774e 100644
--- a/qasync/__init__.py
+++ b/qasync/__init__.py
@@ -27,6 +27,7 @@
 
 QtModule = None
 
+
 # If QT_API env variable is given, use that or fail trying
 qtapi_env = os.getenv("QT_API", "").strip().lower()
 if qtapi_env:
@@ -38,27 +39,27 @@
         "pyside2": "PySide2",
         "pyside": "PySide6",
     }
-    if qtapi_env in env_to_mod_map:
+    try:
         QtModuleName = env_to_mod_map[qtapi_env]
-    else:
+    except KeyError as e:  # pragma: no cover
         raise ImportError(
             "QT_API environment variable set ({}) but not one of [{}].".format(
                 qtapi_env, ", ".join(env_to_mod_map.keys())
             )
-        )
+        ) from e
 
     logger.info("Forcing use of {} as Qt Implementation".format(QtModuleName))
     QtModule = importlib.import_module(QtModuleName)
 
 # If a Qt lib is already imported, use that
-if not QtModule:
+if not QtModule:  # pragma: no cover
     for QtModuleName in ("PyQt5", "PyQt6", "PySide2", "PySide6"):
         if QtModuleName in sys.modules:
             QtModule = sys.modules[QtModuleName]
             break
 
 # Try importing qt libs
-if not QtModule:
+if not QtModule:  # pragma: no cover
     for QtModuleName in ("PyQt5", "PyQt6", "PySide2", "PySide6"):
         try:
             QtModule = importlib.import_module(QtModuleName)
@@ -67,39 +68,16 @@
         else:
             break
 
-if not QtModule:
+if not QtModule:  # pragma: no cover
     raise ImportError("No Qt implementations found")
 
 QtCore = importlib.import_module(QtModuleName + ".QtCore", package=QtModuleName)
 QtGui = importlib.import_module(QtModuleName + ".QtGui", package=QtModuleName)
-
-if QtModuleName == "PyQt5":
-    from PyQt5 import QtWidgets
-    from PyQt5.QtCore import pyqtSlot as Slot
-
-    QApplication = QtWidgets.QApplication
-    AllEvents = QtCore.QEventLoop.ProcessEventsFlags(0x00)
-
-elif QtModuleName == "PyQt6":
-    from PyQt6 import QtWidgets
-    from PyQt6.QtCore import pyqtSlot as Slot
-
-    QApplication = QtWidgets.QApplication
-    AllEvents = QtCore.QEventLoop.ProcessEventsFlag(0x00)
-
-elif QtModuleName == "PySide2":
-    from PySide2 import QtWidgets
-    from PySide2.QtCore import Slot
-
-    QApplication = QtWidgets.QApplication
-    AllEvents = QtCore.QEventLoop.ProcessEventsFlags(0x00)
-
-elif QtModuleName == "PySide6":
-    from PySide6 import QtWidgets
-    from PySide6.QtCore import Slot
-
-    QApplication = QtWidgets.QApplication
-    AllEvents = QtCore.QEventLoop.ProcessEventsFlags(0x00)
+QtWidgets = importlib.import_module(QtModuleName + ".QtWidgets", package=QtModuleName)
+QApplication = QtWidgets.QApplication
+Slot = getattr(QtCore, "pyqtSlot", None) or getattr(QtCore, "Slot")
+ProcessEventsFlag = getattr(QtCore.QEventLoop, "ProcessEventsFlag", None) or getattr(QtCore.QEventLoop, "ProcessEventsFlags", None)
+AllEvents = ProcessEventsFlag(0x00)
 
 from ._common import with_logger  # noqa
 
@@ -180,7 +158,9 @@ def __init__(self, max_workers=10, stack_size=None):
         super().__init__()
         self.__max_workers = max_workers
         self.__queue = Queue()
-        if stack_size is None:
+        # No cover the whole thing because we cannot test
+        # some of the configurations.
+        if stack_size is None:  # pragma: no cover
             # Match cpython/Python/thread_pthread.h
             if sys.platform.startswith("darwin"):
                 stack_size = 16 * 2**20
@@ -776,12 +756,12 @@ def __log_error(cls, *args, **kwds):
 
 QSelectorEventLoop = type("QSelectorEventLoop", (_QEventLoop, _SelectorEventLoop), {})
 
-if os.name == "nt":
+if os.name == "nt":  # pragma: no_cover_if_unix
     from ._windows import _ProactorEventLoop
 
     QIOCPEventLoop = type("QIOCPEventLoop", (_QEventLoop, _ProactorEventLoop), {})
     QEventLoop = QIOCPEventLoop
-else:
+else:  # pragma: no_cover_if_windows
     QEventLoop = QSelectorEventLoop
 
 
@@ -853,7 +833,7 @@ def _get_qevent_loop():
     return QEventLoop(QApplication.instance() or QApplication(sys.argv))
 
 
-if sys.version_info >= (3, 12):
+if sys.version_info >= (3, 12):  # pragma: no_cover_if_lt312
 
     def run(*args, **kwargs):
         return asyncio.run(
@@ -861,7 +841,7 @@ def run(*args, **kwargs):
             **kwargs,
             loop_factory=_get_qevent_loop,
         )
-else:
+else:  # pragma: no_cover_if_geq312
     # backwards compatibility with event loop policies
     class DefaultQEventLoopPolicy(asyncio.DefaultEventLoopPolicy):
         def new_event_loop(self):
diff --git a/qasync/_common.py b/qasync/_common.py
index bed5eb4..193bdc9 100644
--- a/qasync/_common.py
+++ b/qasync/_common.py
@@ -18,7 +18,9 @@ def with_logger(cls):
     module = cls.__module__
     if module is not None:
         cls_name = module + "." + cls_name
-    else:
+    # This is just an internal helper function; edge cases
+    # like this need not be tested, so no cover.
+    else:  # pragma: no cover
         raise AssertionError
     setattr(cls, attr_name, logging.getLogger(cls_name))
     return cls
diff --git a/tests/conftest.py b/tests/conftest.py
index acb8c38..0e8fce5 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -15,13 +15,6 @@
     level=logging.DEBUG, format="%(levelname)s\t%(filename)s:%(lineno)s %(message)s"
 )
 
-
-if os.name == "nt":
-    collect_ignore = ["qasync/_unix.py"]
-else:
-    collect_ignore = ["qasync/_windows.py"]
-
-
 @fixture(scope="session")
 def application():
     from qasync import QApplication