diff --git a/.github/workflows/gating.yaml b/.github/workflows/gating.yaml
index fc65353..2d7fbcb 100644
--- a/.github/workflows/gating.yaml
+++ b/.github/workflows/gating.yaml
@@ -23,18 +23,24 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: Install system dependencies
+        uses: nick-invision/retry@v2
+        with:
+          timeout_minutes: 10
+          retry_wait_seconds: 30
+          max_attempts: 3
+          command: >-
+            sudo apt-get update
+            && sudo apt-get install
+            libkrb5-dev
+            libldap2-dev
+            libsasl2-dev
+
       - name: Install dependencies
-        run: |
-          sudo apt-get -y update
-          sudo apt-get -y install libkrb5-dev libldap2-dev libsasl2-dev
-          python -m pip install --upgrade pip
-          pip install tox
+        run: python -m pip install tox
 
       - name: Test with tox
-        run: tox -e py
-
-      - name: Test with mypy
-        run: tox -e mypy
+        run: python -m tox -e py3
 
       - name: Run coveralls-python
         env:
@@ -99,7 +105,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install poetry tox
+          pip install poetry
 
       - name: Update the Application Version
         run: poetry version "$(./get-version.sh)"
diff --git a/Dockerfile b/Dockerfile
index 1398427..28f3e2b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ RUN set -exo pipefail \
     # install runtime dependencies
     && yum install -y \
         --installroot=/mnt/rootfs \
-        --releasever=39 \
+        --releasever=/ \
         --setopt install_weak_deps=false \
         --nodocs \
         --disablerepo=* \
diff --git a/poetry.lock b/poetry.lock
index 1732118..efd741c 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -356,22 +356,6 @@ typing-extensions = ">=4.8.0"
 [package.extras]
 all = ["email-validator (>=2.0.0)", "httpx (>=0.23.0)", "itsdangerous (>=1.1.0)", "jinja2 (>=2.11.2)", "orjson (>=3.2.1)", "pydantic-extra-types (>=2.0.0)", "pydantic-settings (>=2.0.0)", "python-multipart (>=0.0.7)", "pyyaml (>=5.3.1)", "ujson (>=4.0.1,!=4.0.2,!=4.1.0,!=4.2.0,!=4.3.0,!=5.0.0,!=5.1.0)", "uvicorn[standard] (>=0.12.0)"]
 
-[[package]]
-name = "flake8"
-version = "7.0.0"
-description = "the modular source code checker: pep8 pyflakes and co"
-optional = true
-python-versions = ">=3.8.1"
-files = [
-    {file = "flake8-7.0.0-py2.py3-none-any.whl", hash = "sha256:a6dfbb75e03252917f2473ea9653f7cd799c3064e54d4c8140044c5c065f53c3"},
-    {file = "flake8-7.0.0.tar.gz", hash = "sha256:33f96621059e65eec474169085dc92bf26e7b2d47366b70be2f67ab80dc25132"},
-]
-
-[package.dependencies]
-mccabe = ">=0.7.0,<0.8.0"
-pycodestyle = ">=2.11.0,<2.12.0"
-pyflakes = ">=3.2.0,<3.3.0"
-
 [[package]]
 name = "googleapis-common-protos"
 version = "1.63.0"
@@ -679,17 +663,6 @@ requests = "*"
 requests-gssapi = "*"
 six = "*"
 
-[[package]]
-name = "mccabe"
-version = "0.7.0"
-description = "McCabe checker, plugin for flake8"
-optional = true
-python-versions = ">=3.6"
-files = [
-    {file = "mccabe-0.7.0-py2.py3-none-any.whl", hash = "sha256:6c2d30ab6be0e4a46919781807b4f0d834ebdd6c6e3dca0bda5a15f863427b6e"},
-    {file = "mccabe-0.7.0.tar.gz", hash = "sha256:348e0240c33b60bbdf4e523192ef919f28cb2c3d7d5c7794f74009290f236325"},
-]
-
 [[package]]
 name = "opentelemetry-api"
 version = "1.22.0"
@@ -1051,17 +1024,6 @@ files = [
 [package.dependencies]
 pyasn1 = ">=0.4.6,<0.7.0"
 
-[[package]]
-name = "pycodestyle"
-version = "2.11.1"
-description = "Python style guide checker"
-optional = true
-python-versions = ">=3.8"
-files = [
-    {file = "pycodestyle-2.11.1-py2.py3-none-any.whl", hash = "sha256:44fe31000b2d866f2e41841b18528a505fbd7fef9017b04eff4e2648a0fadc67"},
-    {file = "pycodestyle-2.11.1.tar.gz", hash = "sha256:41ba0e7afc9752dfb53ced5489e89f8186be00e599e712660695b7a75ff2663f"},
-]
-
 [[package]]
 name = "pydantic"
 version = "2.6.4"
@@ -1172,17 +1134,6 @@ files = [
 [package.dependencies]
 typing-extensions = ">=4.6.0,<4.7.0 || >4.7.0"
 
-[[package]]
-name = "pyflakes"
-version = "3.2.0"
-description = "passive checker of Python programs"
-optional = true
-python-versions = ">=3.8"
-files = [
-    {file = "pyflakes-3.2.0-py2.py3-none-any.whl", hash = "sha256:84b5be138a2dfbb40689ca07e2152deb896a65c3a3e24c251c5c62489568074a"},
-    {file = "pyflakes-3.2.0.tar.gz", hash = "sha256:1c61603ff154621fb2a9172037d84dca3500def8c8b630657d1701f026f8af3f"},
-]
-
 [[package]]
 name = "pytest"
 version = "8.1.1"
@@ -1878,9 +1829,9 @@ docs = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "rst.link
 testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=2.2)", "pytest-ignore-flaky", "pytest-mypy", "pytest-ruff (>=0.2.1)"]
 
 [extras]
-test = ["flake8", "httpx", "pytest", "pytest-cov"]
+test = ["factory-boy", "httpx", "pytest", "pytest-cov"]
 
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.9,<3.13"
-content-hash = "a2cc2f664c7fa0df289577b33f4decedffec49a1382b2c5d99c7a5942efe1caf"
+content-hash = "0a0a5cf0ba7de32381ef8f180b43640a6a9054669d55e9377877133814a1d964"
diff --git a/pyproject.toml b/pyproject.toml
index b4ef16f..c003f17 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,6 @@ fastapi = "^0.110.0"
 gunicorn = "^21.2.0"
 python-dateutil = "^2.8.2"
 
-flake8 = {version = "^7.0.0", optional = true}
 factory-boy = {version = "^3.3.0", optional = true}
 pytest = {version = "^8.0.0", optional = true}
 pytest-cov = {version = "^5.0.0", optional = true}
@@ -46,7 +45,7 @@ opentelemetry-instrumentation-sqlalchemy = "^0.43b0"
 
 [tool.poetry.extras]
 test = [
-    "flake8",
+    "factory-boy",
     "pytest",
     "pytest-cov",
     # required by fastapi.testclient
diff --git a/tox.ini b/tox.ini
index 6d3fe60..366e016 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,12 +1,18 @@
 [tox]
 envlist = py3,mypy
-isolated_build = True
+requires =
+    poetry
 
 [testenv]
+allowlist_externals = poetry
+skip_install = true
+no_package = true
+
+[testenv:py3]
 # Set RPM_PY_VERBOSE to "true" to debug koji package installation failures
 passenv = RPM_PY_VERBOSE
-extras =
-    test
+commands_pre =
+    poetry install --only=main --extras=test
 commands =
     pytest \
         --cov-reset \
@@ -17,7 +23,6 @@ commands =
         {posargs}
 
 [testenv:mypy]
-skip_install = true
 deps =
     mypy
 commands =