diff --git a/.github/workflows/build-install.yaml b/.github/workflows/build-install.yaml
deleted file mode 100644
index 22fb04f09d..0000000000
--- a/.github/workflows/build-install.yaml
+++ /dev/null
@@ -1,122 +0,0 @@
-name: 'build and installation tests'
-
-on:
-  push:
-    branches: ['master']
-    paths-ignore:
-      - 'AUTHORS'
-      - 'COPYING'
-      - 'NEWS'
-      - 'README.md'
-      - 'doc/**'
-  pull_request:
-    branches: ['master']
-    paths-ignore:
-      - 'AUTHORS'
-      - 'COPYING'
-      - 'NEWS'
-      - 'README.md'
-      - 'doc/**'
-
-jobs:
-  rpmbuild:
-    name: 'rpmbuild test'
-    runs-on: 'ubuntu-latest'
-    strategy:
-      fail-fast: false
-      matrix:
-        # Testing per python-version using actions/setup-python is not possible,
-        # because rpm doesn't exist on pypi and cannot be installed via pip on ubuntu.
-        # That's why we're going to test on the target distros directly.
-        container:
-
-          # Fedora
-          - 'fedora:36'
-          - 'fedora:rawhide'
-
-          # OpenSUSE
-          # leap < 15.2 doesn't contain git-lfs which causes actions/checkout to fail
-          - 'opensuse/leap:15.3'
-          - 'opensuse/leap:15.4'
-          - 'opensuse/tumbleweed'
-
-          # CentOS Stream
-          - 'quay.io/centos/centos:stream9'
-
-    container:
-      image: ${{ matrix.container }}
-
-    steps:
-      - name: 'Install packages (OpenSUSE)'
-        if: ${{ startsWith(matrix.container, 'opensuse/') }}
-        run: |
-            zypper --non-interactive --gpg-auto-import-keys refresh
-            zypper --non-interactive dist-upgrade
-            zypper --non-interactive install git-lfs rpm-build
-
-      - name: 'Install packages (Fedora/CentOS)'
-        if: ${{ startsWith(matrix.container, 'fedora:') || contains(matrix.container, 'centos:') }}
-        run: |
-            dnf -y makecache
-            dnf -y distro-sync
-            dnf -y install git-lfs rpm-build dnf-plugins-core
-
-      - uses: actions/checkout@v3
-        with:
-            fetch-depth: 0
-
-      - name: 'Install build dependencies (OpenSUSE)'
-        if: ${{ startsWith(matrix.container, 'opensuse/') }}
-        run: |
-            zypper --non-interactive install $(rpmspec -q --buildrequires contrib/osc.spec)
-
-      - name: 'Install build dependencies (Fedora/CentOS)'
-        if: ${{ startsWith(matrix.container, 'fedora:') || contains(matrix.container, 'centos:') }}
-        run: |
-            dnf -y builddep contrib/osc.spec
-
-      - name: 'Build SRPM and RPMs'
-        run: |
-            git config --global --add safe.directory "$(pwd)"
-
-            git remote add upstream https://github.com/openSUSE/osc.git
-            git fetch upstream --tags --force
-
-            ./contrib/build_rpm.py --srpm --rpm
-
-      - name: 'Install built RPMs (OpenSUSE)'
-        if: ${{ startsWith(matrix.container, 'opensuse/') }}
-        run: |
-            zypper --non-interactive install --force --allow-vendor-change --allow-unsigned-rpm ./contrib/*/*.rpm
-
-      - name: 'Install build RPMs (Fedora/CentOS)'
-        if: ${{ startsWith(matrix.container, 'fedora:') || contains(matrix.container, 'centos:') }}
-        run: |
-            dnf -y install ./contrib/*/*.rpm
-
-      - name: 'Run installed osc'
-        run: |
-            osc --help
-
-  pip:
-    name: 'pip install test'
-    runs-on: 'ubuntu-latest'
-    strategy:
-      fail-fast: false
-
-    steps:
-      - name: 'Install packages'
-        run: |
-            sudo apt-get -y update
-            sudo apt-get -y upgrade
-            sudo apt-get -y --no-install-recommends install git python3-pip python3-rpm
-
-      - uses: actions/checkout@v3
-
-      - name: 'Install osc from pip'
-        run: |
-            pip3 install .
-
-      - name: 'Run installed osc'
-        run: |
-            osc --help
diff --git a/.github/workflows/linters.yaml b/.github/workflows/linters.yaml
new file mode 100644
index 0000000000..14fa0ee20d
--- /dev/null
+++ b/.github/workflows/linters.yaml
@@ -0,0 +1,58 @@
+name: 'linters'
+
+on:
+  push:
+    branches: ['master']
+    paths:
+      - '.github/**'
+      - '**.py'
+      - 'tests/**'
+  pull_request:
+    branches: ['master']
+    paths:
+      - '.github/**'
+      - '**.py'
+      - 'tests/**'
+
+jobs:
+  pylint_plugins:
+    name: 'diff pylint runs on osc plugins'
+    runs-on: 'ubuntu-latest'
+    strategy:
+      fail-fast: false
+      matrix:
+        plugin_repository:
+          - openSUSE/openSUSE-release-tools
+          - openSUSE/osc-plugin-collab
+          - openSUSE/osc-plugin-install
+          - openSUSE/osc-plugin-overview
+          - openSUSE/osc-plugin-qam
+
+    steps:
+      - name: 'Install packages'
+        run: |
+            sudo apt-get -y update
+            sudo apt-get -y --no-install-recommends install diffutils pylint
+
+      - uses: actions/checkout@v3
+        with:
+          path: osc-pr
+
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.base.sha }}
+          path: osc-master
+
+      - uses: actions/checkout@v3
+        with:
+          repository: ${{ matrix.plugin_repository }}
+          path: plugin
+
+      - name: 'Diff pylint runs'
+        run: |
+            cd plugin
+            find -maxdepth 2 -name __init__.py | while read i; do dirname $i; done | sort > .pylint-args
+            find -maxdepth 1 -name '*.py' | sort >> .pylint-args
+            PYTHONPATH="../osc-master" pylint --errors-only $(cat .pylint-args) | sort > pylint-osc-master.log || :
+            PYTHONPATH="../osc-pr" pylint --errors-only $(cat .pylint-args) | sort > pylint-osc-pr.log || :
+            diff -u pylint-osc-master.log pylint-osc-pr.log
diff --git a/.github/workflows/unittests.yaml b/.github/workflows/unittests.yaml
deleted file mode 100644
index 8767ec2722..0000000000
--- a/.github/workflows/unittests.yaml
+++ /dev/null
@@ -1,93 +0,0 @@
-name: 'unit tests'
-
-on:
-  push:
-    branches: ['master']
-    paths:
-      - '.github/**'
-      - '**.py'
-      - 'tests/**'
-  pull_request:
-    branches: ['master']
-    paths:
-      - '.github/**'
-      - '**.py'
-      - 'tests/**'
-
-jobs:
-  test:
-    name: 'unit tests'
-    runs-on: 'ubuntu-latest'
-    strategy:
-      fail-fast: false
-      matrix:
-        # Testing per python-version using actions/setup-python is not possible,
-        # because rpm doesn't exist on pypi and cannot be installed via pip on ubuntu.
-        # That's why we're going to test on the target distros directly.
-        container:
-
-          # Fedora
-          - 'fedora:36'
-          - 'fedora:rawhide'
-
-          # openSUSE
-          # leap < 15.2 doesn't contain git-lfs which causes actions/checkout to fail
-          - 'opensuse/leap:15.3'
-          - 'opensuse/leap:15.4'
-          - 'opensuse/tumbleweed'
-
-          # CentOS Stream
-          - 'quay.io/centos/centos:stream9'
-
-          # Debian
-          - 'debian:stable'
-          - 'debian:unstable'
-
-          # Ubuntu
-          - 'ubuntu:latest'
-
-    container:
-      image: ${{ matrix.container }}
-
-    steps:
-      - name: 'Install packages (openSUSE)'
-        if: ${{ startsWith(matrix.container, 'opensuse/') }}
-        run: |
-            zypper -n --gpg-auto-import-keys refresh
-            zypper -n lr --details
-            grep -qi tumbleweed /etc/os-release && zypper -n dist-upgrade || zypper -n patch || zypper -n patch
-            zypper -n install git-lfs
-            zypper -n install diffstat diffutils python3 python3-cryptography python3-pip python3-rpm python3-setuptools python3-urllib3
-
-      - name: 'Install packages (Fedora/CentOS)'
-        if: ${{ startsWith(matrix.container, 'fedora:') || contains(matrix.container, 'centos:') }}
-        run: |
-            dnf -y makecache
-            dnf -y distro-sync
-            dnf -y install git-lfs
-            dnf -y install diffstat diffutils python3 python3-cryptography python3-pip python3-rpm python3-setuptools python3-urllib3
-
-      - name: 'Install packages (Debian/Ubuntu)'
-        if: ${{ startsWith(matrix.container, 'debian:') || startsWith(matrix.container, 'ubuntu:') }}
-        run: |
-            apt-get -y update
-            apt-get -y upgrade
-            apt-get -y --no-install-recommends install git-lfs
-            apt-get -y --no-install-recommends install diffstat diffutils python3 python3-cryptography python3-pip python3-rpm python3-setuptools python3-urllib3
-
-      - uses: actions/checkout@v3
-
-      - name: 'Run unit tests'
-        run: |
-          pip3 install -e .
-          python3 setup.py test
-
-      - name: 'Generate coverage reports (openSUSE Tumbleweed)'
-        if: ${{ matrix.container == 'opensuse/tumbleweed' }}
-        run: |
-            zypper -n install python3-pytest python3-pytest-cov
-            pytest --cov=osc
-
-      - name: 'Upload coverage reports to Codecov (openSUSE Tumbleweed)'
-        if: ${{ matrix.container == 'opensuse/tumbleweed' }}
-        uses: codecov/codecov-action@v3
diff --git a/osc/core.py b/osc/core.py
index dc3eafe60b..4887466c3a 100644
--- a/osc/core.py
+++ b/osc/core.py
@@ -45,7 +45,7 @@
 from . import conf
 from . import meter
 from . import oscerr
-from .connection import http_request, http_GET, http_POST, http_PUT, http_DELETE
+from .connection import http_request, http_GET, http_POST, http_DELETE
 from .store import Store
 from .util.helper import decode_list, decode_it, raw_input, _html_escape