diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 0000000..5c04afa
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,4 @@
+[report]
+omit =
+    tests/*
+    /usr/lib/python3/dist-packages/*
\ No newline at end of file
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..44f34bc
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,35 @@
+name: Test
+
+on:
+    pull_request:
+        branches: [main]
+    workflow_dispatch:
+
+jobs:
+    Test:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                qgis_image_tag: [release-3_28]
+        env:
+            OS: ubuntu
+            QGIS_IMAGE_TAG: ${{ matrix.qgis_image_tag }}
+        steps:
+            - uses: actions/checkout@v3
+
+            - name: Pull QGIS
+              run: docker pull qgis/qgis:${{ matrix.qgis_image_tag }}
+
+            - name: Export requirements.txt
+              run: |
+                  pip3 install poetry
+                  poetry export --with dev -f requirements.txt -o requirements.txt
+
+            - name: Run tests
+              run: docker run --rm --net=host --volume .:/app -w=/app -e QGIS_PLUGIN_IN_CI=1 qgis/qgis:${{ matrix.qgis_image_tag }} sh -c "pip3 install -r /app/requirements.txt && xvfb-run -s '+extension GLX -screen 0 1024x768x24' pytest -v --cov --cov-report=xml --cov-report=term"
+
+            - name: Upload coverage reports to Codecov
+              uses: codecov/codecov-action@v4.0.1
+              with:
+                  token: ${{ secrets.CODECOV_TOKEN }}
+                  slug: MIERUNE/GTFS-GO
diff --git a/.gitignore b/.gitignore
index b21e8da..0e2285c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,8 @@
 Desktop.ini
 __pycache__/
 .venv/
+.coverage
+coverage.xml
+.pytest_cache/
+.ruff_cache/
+requirements.txt
\ No newline at end of file
diff --git a/__init__.py b/__init__.py
index 0370e71..64b3b3c 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,3 +1,10 @@
+import os
+import sys
+
+# to import modules as non-relative
+sys.path.append(os.path.dirname(__file__))
+
+
 def classFactory(iface):  # pylint: disable=invalid-name
     """Load GTFSGo class from file GTFSGo.
 
diff --git a/gtfs_go.py b/gtfs_go.py
index d3c233d..229a807 100644
--- a/gtfs_go.py
+++ b/gtfs_go.py
@@ -5,7 +5,7 @@
 from qgis.PyQt.QtWidgets import QAction
 
 # Import the code for the DockWidget
-from .gtfs_go_dialog import GTFSGoDialog
+from gtfs_go_dialog import GTFSGoDialog
 
 
 class GTFSGo:
diff --git a/gtfs_go_dialog.py b/gtfs_go_dialog.py
index 843d6ab..5a5c12b 100755
--- a/gtfs_go_dialog.py
+++ b/gtfs_go_dialog.py
@@ -18,14 +18,15 @@
 from qgis.gui import QgisInterface
 from qgis.PyQt import uic
 
-from . import constants, repository
-from .gtfs_go_labeling import get_labeling_for_stops
-from .gtfs_go_renderer import Renderer
-from .gtfs_go_settings import (
+import constants
+import gtfs_parser
+import repository
+from gtfs_go_labeling import get_labeling_for_stops
+from gtfs_go_renderer import Renderer
+from gtfs_go_settings import (
     STOPS_MINIMUM_VISIBLE_SCALE,
 )
-from .gtfs_parser import gtfs_parser
-from .repository.japan_dpf.table import HEADERS, HEADERS_TO_HIDE
+from repository.japan_dpf.table import HEADERS, HEADERS_TO_HIDE
 
 DATALIST_JSON_PATH = os.path.join(os.path.dirname(__file__), "gtfs_go_datalist.json")
 TEMP_DIR = os.path.join(tempfile.gettempdir(), "GTFSGo")
diff --git a/gtfs_go_labeling.py b/gtfs_go_labeling.py
index 8e6940d..9b3bd48 100644
--- a/gtfs_go_labeling.py
+++ b/gtfs_go_labeling.py
@@ -6,7 +6,7 @@
 )
 from qgis.PyQt.QtGui import QColor, QFont
 
-from .gtfs_go_settings import (
+from gtfs_go_settings import (
     STOPS_LABEL_BUFFER_COLOR,
     STOPS_LABEL_BUFFER_SIZE_MM,
     STOPS_LABEL_DIST_MM,
diff --git a/gtfs_go_renderer.py b/gtfs_go_renderer.py
index d9dceb2..a40799c 100644
--- a/gtfs_go_renderer.py
+++ b/gtfs_go_renderer.py
@@ -10,7 +10,7 @@
 from qgis.PyQt.QtCore import Qt
 from qgis.PyQt.QtGui import QColor
 
-from .gtfs_go_settings import (
+from gtfs_go_settings import (
     ROUTES_COLOR_LIST,
     ROUTES_LINE_WIDTH_MM,
     ROUTES_OUTLINE_COLOR,
diff --git a/poetry.lock b/poetry.lock
index d43b461..0ab6017 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -32,40 +32,87 @@ files = [
 ]
 
 [[package]]
-name = "exceptiongroup"
-version = "1.1.0"
-description = "Backport of PEP 654 (exception groups)"
+name = "coverage"
+version = "7.5.2"
+description = "Code coverage measurement for Python"
 category = "dev"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.8"
 files = [
-    {file = "exceptiongroup-1.1.0-py3-none-any.whl", hash = "sha256:327cbda3da756e2de031a3107b81ab7b3770a602c4d16ca618298c526f4bec1e"},
-    {file = "exceptiongroup-1.1.0.tar.gz", hash = "sha256:bcb67d800a4497e1b404c2dd44fca47d3b7a5e5433dbab67f96c1a685cdfdf23"},
+    {file = "coverage-7.5.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:554c7327bf0fd688050348e22db7c8e163fb7219f3ecdd4732d7ed606b417263"},
+    {file = "coverage-7.5.2-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:d0305e02e40c7cfea5d08d6368576537a74c0eea62b77633179748d3519d6705"},
+    {file = "coverage-7.5.2-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:829fb55ad437d757c70d5b1c51cfda9377f31506a0a3f3ac282bc6a387d6a5f1"},
+    {file = "coverage-7.5.2-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:894b1acded706f1407a662d08e026bfd0ff1e59e9bd32062fea9d862564cfb65"},
+    {file = "coverage-7.5.2-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:fe76d6dee5e4febefa83998b17926df3a04e5089e3d2b1688c74a9157798d7a2"},
+    {file = "coverage-7.5.2-cp310-cp310-musllinux_1_1_aarch64.whl", hash = "sha256:c7ebf2a37e4f5fea3c1a11e1f47cea7d75d0f2d8ef69635ddbd5c927083211fc"},
+    {file = "coverage-7.5.2-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:20e611fc36e1a0fc7bbf957ef9c635c8807d71fbe5643e51b2769b3cc0fb0b51"},
+    {file = "coverage-7.5.2-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:7c5c5b7ae2763533152880d5b5b451acbc1089ade2336b710a24b2b0f5239d20"},
+    {file = "coverage-7.5.2-cp310-cp310-win32.whl", hash = "sha256:1e4225990a87df898e40ca31c9e830c15c2c53b1d33df592bc8ef314d71f0281"},
+    {file = "coverage-7.5.2-cp310-cp310-win_amd64.whl", hash = "sha256:976cd92d9420e6e2aa6ce6a9d61f2b490e07cb468968adf371546b33b829284b"},
+    {file = "coverage-7.5.2-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:5997d418c219dcd4dcba64e50671cca849aaf0dac3d7a2eeeb7d651a5bd735b8"},
+    {file = "coverage-7.5.2-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:ec27e93bbf5976f0465e8936f02eb5add99bbe4e4e7b233607e4d7622912d68d"},
+    {file = "coverage-7.5.2-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:1f11f98753800eb1ec872562a398081f6695f91cd01ce39819e36621003ec52a"},
+    {file = "coverage-7.5.2-cp311-cp311-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:6e34680049eecb30b6498784c9637c1c74277dcb1db75649a152f8004fbd6646"},
+    {file = "coverage-7.5.2-cp311-cp311-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:3e12536446ad4527ac8ed91d8a607813085683bcce27af69e3b31cd72b3c5960"},
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+    {file = "coverage-7.5.2-cp39-cp39-win_amd64.whl", hash = "sha256:2c79f058e7bec26b5295d53b8c39ecb623448c74ccc8378631f5cb5c16a7e02c"},
+    {file = "coverage-7.5.2-pp38.pp39.pp310-none-any.whl", hash = "sha256:40dbb8e7727560fe8ab65efcddfec1ae25f30ef02e2f2e5d78cfb52a66781ec5"},
+    {file = "coverage-7.5.2.tar.gz", hash = "sha256:13017a63b0e499c59b5ba94a8542fb62864ba3016127d1e4ef30d354fc2b00e9"},
 ]
 
+[package.dependencies]
+tomli = {version = "*", optional = true, markers = "python_full_version <= \"3.11.0a6\" and extra == \"toml\""}
+
 [package.extras]
-test = ["pytest (>=6)"]
+toml = ["tomli"]
 
 [[package]]
-name = "importlib-metadata"
-version = "6.7.0"
-description = "Read metadata from Python packages"
+name = "exceptiongroup"
+version = "1.1.0"
+description = "Backport of PEP 654 (exception groups)"
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "importlib_metadata-6.7.0-py3-none-any.whl", hash = "sha256:cb52082e659e97afc5dac71e79de97d8681de3aa07ff18578330904a9d18e5b5"},
-    {file = "importlib_metadata-6.7.0.tar.gz", hash = "sha256:1aaf550d4f73e5d6783e7acb77aec43d49da8017410afae93822cc9cca98c4d4"},
+    {file = "exceptiongroup-1.1.0-py3-none-any.whl", hash = "sha256:327cbda3da756e2de031a3107b81ab7b3770a602c4d16ca618298c526f4bec1e"},
+    {file = "exceptiongroup-1.1.0.tar.gz", hash = "sha256:bcb67d800a4497e1b404c2dd44fca47d3b7a5e5433dbab67f96c1a685cdfdf23"},
 ]
 
-[package.dependencies]
-typing-extensions = {version = ">=3.6.4", markers = "python_version < \"3.8\""}
-zipp = ">=0.5"
-
 [package.extras]
-docs = ["furo", "jaraco.packaging (>=9)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
-perf = ["ipython"]
-testing = ["flufl.flake8", "importlib-resources (>=1.3)", "packaging", "pyfakefs", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-mypy (>=0.9.1)", "pytest-perf (>=0.9.2)", "pytest-ruff"]
+test = ["pytest (>=6)"]
 
 [[package]]
 name = "iniconfig"
@@ -79,6 +126,52 @@ files = [
     {file = "iniconfig-2.0.0.tar.gz", hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3"},
 ]
 
+[[package]]
+name = "numpy"
+version = "1.26.4"
+description = "Fundamental package for array computing in Python"
+category = "dev"
+optional = false
+python-versions = ">=3.9"
+files = [
+    {file = "numpy-1.26.4-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:9ff0f4f29c51e2803569d7a51c2304de5554655a60c5d776e35b4a41413830d0"},
+    {file = "numpy-1.26.4-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:2e4ee3380d6de9c9ec04745830fd9e2eccb3e6cf790d39d7b98ffd19b0dd754a"},
+    {file = "numpy-1.26.4-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:d209d8969599b27ad20994c8e41936ee0964e6da07478d6c35016bc386b66ad4"},
+    {file = "numpy-1.26.4-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:ffa75af20b44f8dba823498024771d5ac50620e6915abac414251bd971b4529f"},
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 version = "23.0"
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 [package.dependencies]
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+    {version = ">=1.23.2", markers = "python_version == \"3.11\""},
+    {version = ">=1.26.0", markers = "python_version >= \"3.12\""},
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+pytz = ">=2020.1"
+tzdata = ">=2022.7"
+
+[package.extras]
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+parquet = ["pyarrow (>=10.0.1)"]
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+xml = ["lxml (>=4.9.2)"]
+
+[[package]]
+name = "pluggy"
+version = "1.5.0"
+description = "plugin and hook calling mechanisms for python"
+category = "dev"
+optional = false
+python-versions = ">=3.8"
+files = [
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+]
 
 [package.extras]
 dev = ["pre-commit", "tox"]
@@ -126,7 +290,6 @@ files = [
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-importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<2.0"
@@ -135,6 +298,105 @@ tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
 [package.extras]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
 
+[[package]]
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+version = "5.0.0"
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+category = "dev"
+optional = false
+python-versions = ">=3.8"
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+]
+
+[package.dependencies]
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+pytest = ">=4.6"
+
+[package.extras]
+testing = ["fields", "hunter", "process-tests", "pytest-xdist", "virtualenv"]
+
+[[package]]
+name = "pytest-mock"
+version = "3.14.0"
+description = "Thin-wrapper around the mock package for easier use with pytest"
+category = "dev"
+optional = false
+python-versions = ">=3.8"
+files = [
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+
+[package.dependencies]
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+
+[package.extras]
+dev = ["pre-commit", "pytest-asyncio", "tox"]
+
+[[package]]
+name = "pytest-qgis"
+version = "2.0.0"
+description = "A pytest plugin for testing QGIS python plugins"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+files = [
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+
+[package.dependencies]
+pytest = ">=6.0"
+
+[[package]]
+name = "pytest-qt"
+version = "4.4.0"
+description = "pytest support for PyQt and PySide applications"
+category = "dev"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "pytest-qt-4.4.0.tar.gz", hash = "sha256:76896142a940a4285339008d6928a36d4be74afec7e634577e842c9cc5c56844"},
+    {file = "pytest_qt-4.4.0-py3-none-any.whl", hash = "sha256:001ed2f8641764b394cf286dc8a4203e40eaf9fff75bf0bfe5103f7f8d0c591d"},
+]
+
+[package.dependencies]
+pluggy = ">=1.1"
+pytest = "*"
+
+[package.extras]
+dev = ["pre-commit", "tox"]
+doc = ["sphinx", "sphinx-rtd-theme"]
+
+[[package]]
+name = "python-dateutil"
+version = "2.9.0.post0"
+description = "Extensions to the standard Python datetime module"
+category = "dev"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
+files = [
+    {file = "python-dateutil-2.9.0.post0.tar.gz", hash = "sha256:37dd54208da7e1cd875388217d5e00ebd4179249f90fb72437e91a35459a0ad3"},
+    {file = "python_dateutil-2.9.0.post0-py2.py3-none-any.whl", hash = "sha256:a8b2bc7bffae282281c8140a97d3aa9c14da0b136dfe83f850eea9a5f7470427"},
+]
+
+[package.dependencies]
+six = ">=1.5"
+
+[[package]]
+name = "pytz"
+version = "2024.1"
+description = "World timezone definitions, modern and historical"
+category = "dev"
+optional = false
+python-versions = "*"
+files = [
+    {file = "pytz-2024.1-py2.py3-none-any.whl", hash = "sha256:328171f4e3623139da4983451950b28e95ac706e13f3f2630a879749e7a8b319"},
+    {file = "pytz-2024.1.tar.gz", hash = "sha256:2a29735ea9c18baf14b448846bde5a48030ed267578472d8955cd0e7443a9812"},
+]
+
 [[package]]
 name = "ruff"
 version = "0.4.3"
@@ -163,46 +425,42 @@ files = [
 ]
 
 [[package]]
-name = "tomli"
-version = "2.0.1"
-description = "A lil' TOML parser"
+name = "six"
+version = "1.16.0"
+description = "Python 2 and 3 compatibility utilities"
 category = "dev"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
-    {file = "tomli-2.0.1-py3-none-any.whl", hash = "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc"},
-    {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
+    {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
+    {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
 ]
 
 [[package]]
-name = "typing-extensions"
-version = "4.5.0"
-description = "Backported and Experimental Type Hints for Python 3.7+"
+name = "tomli"
+version = "2.0.1"
+description = "A lil' TOML parser"
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "typing_extensions-4.5.0-py3-none-any.whl", hash = "sha256:fb33085c39dd998ac16d1431ebc293a8b3eedd00fd4a32de0ff79002c19511b4"},
-    {file = "typing_extensions-4.5.0.tar.gz", hash = "sha256:5cb5f4a79139d699607b3ef622a1dedafa84e115ab0024e0d9c044a9479ca7cb"},
+    {file = "tomli-2.0.1-py3-none-any.whl", hash = "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc"},
+    {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
 ]
 
 [[package]]
-name = "zipp"
-version = "3.15.0"
-description = "Backport of pathlib-compatible object wrapper for zip files"
+name = "tzdata"
+version = "2024.1"
+description = "Provider of IANA time zone data"
 category = "dev"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=2"
 files = [
-    {file = "zipp-3.15.0-py3-none-any.whl", hash = "sha256:48904fc76a60e542af151aded95726c1a5c34ed43ab4134b597665c86d7ad556"},
-    {file = "zipp-3.15.0.tar.gz", hash = "sha256:112929ad649da941c23de50f356a2b5570c954b65150642bccdd66bf194d224b"},
+    {file = "tzdata-2024.1-py2.py3-none-any.whl", hash = "sha256:9068bc196136463f5245e51efda838afa15aaeca9903f49050dfa2679db4d252"},
+    {file = "tzdata-2024.1.tar.gz", hash = "sha256:2674120f8d891909751c38abcdfd386ac0a5a1127954fbc332af6b5ceae07efd"},
 ]
 
-[package.extras]
-docs = ["furo", "jaraco.packaging (>=9)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
-testing = ["big-O", "flake8 (<5)", "jaraco.functools", "jaraco.itertools", "more-itertools", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-flake8", "pytest-mypy (>=0.9.1)"]
-
 [metadata]
 lock-version = "2.0"
-python-versions = "^3.7"
-content-hash = "d5e14aa9c5727f987d651aec8474f1a72ef3e1a16192c3d9fc6b754d2ec293d4"
+python-versions = "^3.9"
+content-hash = "1390d9a37044c5d0e692ab25f6557e7834afbc0da043f94fe62b19917f61911f"
diff --git a/pyproject.toml b/pyproject.toml
index 805b1ac..43f0cf1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,12 +6,18 @@ authors = ["Kanahiro <mediterranean1769@gmail.com>"]
 readme = "README.md"
 
 [tool.poetry.dependencies]
-python = "^3.7"
+python = "^3.9"
 
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.2.1"
 ruff = "^0.4.3"
+pytest-qt = "^4.4.0"
+pytest-cov = "^5.0.0"
+pandas = "^2.2.2"
+pytest-mock = "^3.14.0"
+pytest-qgis = "^2.0.0"
+
 
 [build-system]
 requires = ["poetry-core"]
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..fd7930e
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,22 @@
+from typing import Iterable
+
+import pytest
+from pytest_mock import MockerFixture
+from qgis.gui import QgisInterface
+from qgis.PyQt.QtCore import QSettings
+
+from ..__init__ import classFactory
+
+
+@pytest.fixture()
+def plugin(qgis_iface: QgisInterface, mocker: MockerFixture) -> Iterable[None]:
+    # mock
+    mocker.patch.object(QSettings, "value", return_value="en")
+    qgis_iface.addPluginToWebMenu = lambda x, y: None  # pytest-qgisで未実装
+
+    _plugin = classFactory(qgis_iface)
+    _plugin.initGui()
+
+    yield _plugin
+
+    # _plugin.unload() QgisInterface.removePluginMenu()がpytest-qgisで未実装
diff --git a/tests/test_gtfs_go.py b/tests/test_gtfs_go.py
new file mode 100644
index 0000000..4563349
--- /dev/null
+++ b/tests/test_gtfs_go.py
@@ -0,0 +1,16 @@
+from gtfs_go import GTFSGo
+
+
+def test_run(plugin: GTFSGo):
+    """ダイアログを表示する関数のテスト"""
+
+    # 初期状態でダイアログは未初期化
+    assert plugin.dialog is None
+
+    plugin.run()
+    assert plugin.dialog.isVisible()
+
+    plugin.dialog.close()
+
+    assert not plugin.dialog.isVisible()  # ダイアログが閉じられても
+    assert plugin.dialog is not None  # インスタンスは保持される