diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bf279df1fde..eb35034860a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - master
+      - test-owcsvimport-cleanup
   pull_request:
     branches:
       - master
@@ -29,93 +30,93 @@ jobs:
       - name: Run Pylint
         run:  tox -e pylint-ci
 
-  test_on_linux:
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 30
-    name: ${{ matrix.name }} (${{ matrix.os }}, py${{ matrix.python-version }})
-    strategy:
-      fail-fast: False
-      matrix:
-        os: [ubuntu-22.04]
-        python-version: [3.9, '3.10', '3.11']
-        tox_env: [orange-released]
-        name: [Released]
-        include:
-          - os: ubuntu-22.04
-            python-version: '3.11'
-            tox_env: orange-latest
-            name: Latest
-          - os: ubuntu-20.04
-            python-version: 3.9
-            tox_env: orange-oldest
-            name: Oldest dependencies
-          - os: ubuntu-22.04
-            python-version: '3.10'
-            tox_env: pyqt6
-            name: PyQt6
-          - os: ubuntu-22.04
-            python-version: '3.11'
-            tox_env: beta
-            name: "Scientific Python nightly wheels"
-
-    services:
-      postgres:
-        image: orangedm/postgres:11
-        env:
-          POSTGRES_USER: postgres_user
-          POSTGRES_PASSWORD: postgres_password
-          POSTGRES_DB: postgres_db
-        ports:
-          - 5432:5432
-        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
-
-      SQLServer:
-        image: mcr.microsoft.com/mssql/server:2017-latest
-        env:
-          ACCEPT_EULA: Y
-          SA_PASSWORD: sqlServerPassw0rd
-        ports:
-          - 1433:1433
-
-    steps:
-      - uses: actions/checkout@v4
-      - name: Setup Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - name: Install linux system dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa libxcb-shape0 libxcb-cursor0
-
-      - name: Install glibc-tools dependency on Ubuntu-22.04
-        if: matrix.os == 'ubuntu-22.04'
-        run: sudo apt-get install -y glibc-tools  # required for catchsegv
-
-      - name: Install Tox
-        run: |
-          python -m pip install --upgrade pip
-          python -m pip install --upgrade tox
-
-      - name: Skip testing workflows at coverage
-        if: |
-          matrix.python-version == '3.11' && matrix.tox_env == 'orange-released'
-        run: |
-          echo 'SKIP_EXAMPLE_WORKFLOWS=1' >> $GITHUB_ENV
-
-      - name: Run Tox
-        run: catchsegv xvfb-run -a -s "$XVFBARGS" tox -e ${{ matrix.tox_env }}
-        env:
-          XVFBARGS: "-screen 0 1280x1024x24"
-          ORANGE_TEST_DB_URI: postgres://postgres_user:postgres_password@localhost:5432/postgres_db|mssql://SA:sqlServerPassw0rd@localhost:1433
-
-      - name: Upload code coverage
-        if: matrix.python-version == '3.11' && matrix.tox_env == 'orange-released'
-        uses: codecov/codecov-action@v4
-        with:
-          fail_ci_if_error: true
-          token: ${{ secrets.CODECOV_TOKEN }}
+#  test_on_linux:
+#    runs-on: ${{ matrix.os }}
+#    timeout-minutes: 30
+#    name: ${{ matrix.name }} (${{ matrix.os }}, py${{ matrix.python-version }})
+#    strategy:
+#      fail-fast: False
+#      matrix:
+#        os: [ubuntu-22.04]
+#        python-version: [3.9, '3.10', '3.11']
+#        tox_env: [orange-released]
+#        name: [Released]
+#        include:
+#          - os: ubuntu-22.04
+#            python-version: '3.11'
+#            tox_env: orange-latest
+#            name: Latest
+#          - os: ubuntu-20.04
+#            python-version: 3.9
+#            tox_env: orange-oldest
+#            name: Oldest dependencies
+#          - os: ubuntu-22.04
+#            python-version: '3.10'
+#            tox_env: pyqt6
+#            name: PyQt6
+#          - os: ubuntu-22.04
+#            python-version: '3.11'
+#            tox_env: beta
+#            name: "Scientific Python nightly wheels"
+#
+#    services:
+#      postgres:
+#        image: orangedm/postgres:11
+#        env:
+#          POSTGRES_USER: postgres_user
+#          POSTGRES_PASSWORD: postgres_password
+#          POSTGRES_DB: postgres_db
+#        ports:
+#          - 5432:5432
+#        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
+#
+#      SQLServer:
+#        image: mcr.microsoft.com/mssql/server:2017-latest
+#        env:
+#          ACCEPT_EULA: Y
+#          SA_PASSWORD: sqlServerPassw0rd
+#        ports:
+#          - 1433:1433
+#
+#    steps:
+#      - uses: actions/checkout@v4
+#      - name: Setup Python
+#        uses: actions/setup-python@v5
+#        with:
+#          python-version: ${{ matrix.python-version }}
+#
+#      - name: Install linux system dependencies
+#        run: |
+#          sudo apt-get update
+#          sudo apt-get install -y libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa libxcb-shape0 libxcb-cursor0
+#
+#      - name: Install glibc-tools dependency on Ubuntu-22.04
+#        if: matrix.os == 'ubuntu-22.04'
+#        run: sudo apt-get install -y glibc-tools  # required for catchsegv
+#
+#      - name: Install Tox
+#        run: |
+#          python -m pip install --upgrade pip
+#          python -m pip install --upgrade tox
+#
+#      - name: Skip testing workflows at coverage
+#        if: |
+#          matrix.python-version == '3.11' && matrix.tox_env == 'orange-released'
+#        run: |
+#          echo 'SKIP_EXAMPLE_WORKFLOWS=1' >> $GITHUB_ENV
+#
+#      - name: Run Tox
+#        run: catchsegv xvfb-run -a -s "$XVFBARGS" tox -e ${{ matrix.tox_env }}
+#        env:
+#          XVFBARGS: "-screen 0 1280x1024x24"
+#          ORANGE_TEST_DB_URI: postgres://postgres_user:postgres_password@localhost:5432/postgres_db|mssql://SA:sqlServerPassw0rd@localhost:1433
+#
+#      - name: Upload code coverage
+#        if: matrix.python-version == '3.11' && matrix.tox_env == 'orange-released'
+#        uses: codecov/codecov-action@v4
+#        with:
+#          fail_ci_if_error: true
+#          token: ${{ secrets.CODECOV_TOKEN }}
 
   test_on_macos_and_windows:
     runs-on: ${{ matrix.os }}
@@ -124,23 +125,23 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-latest, windows-latest]
+        os: [macos-latest]
         python-version: [3.9, '3.10', '3.11']
         tox_env: [orange-released]
         name: [Released]
         include:
-          - os: windows-latest
-            python-version: '3.11'
-            tox_env: orange-latest
-            name: Latest
+#          - os: windows-latest
+#            python-version: '3.11'
+#            tox_env: orange-latest
+#            name: Latest
           - os: macos-latest
             python-version: '3.11'
             tox_env: orange-latest
             name: Latest
-          - os: windows-latest
-            python-version: '3.10'
-            tox_env: pyqt6
-            name: PyQt6
+#          - os: windows-latest
+#            python-version: '3.10'
+#            tox_env: pyqt6
+#            name: PyQt6
           - os: macos-latest
             python-version: 3.9
             tox_env: pyqt6
diff --git a/tox.ini b/tox.ini
index bb3b2dabc0a..29808418b90 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,10 +34,10 @@ deps =
     psycopg2-binary
     pymssql<3.0
     latest: https://github.com/biolab/orange-canvas-core/archive/refs/heads/master.zip#egg=orange-canvas-core
-    latest: https://github.com/biolab/orange-widget-base/archive/refs/heads/master.zip#egg=orange-widget-base
+    latest: https://github.com/ales-erjavec/orange-widget-base/archive/refs/heads/test-owcsvimport-cleanup.zip#egg=orange-widget-base
     # GUI requirements
     oldest: orange-canvas-core==0.2.0
-    oldest: orange-widget-base==4.23.0
+    oldest: orange-widget-base==4.23.0https://github.com/ales-erjavec/orange-widget-base/archive/refs/heads/test-owcsvimport-cleanup.zip#egg=orange-widget-base
     oldest: AnyQt==0.2.0
     oldest: matplotlib==3.2.0
     oldest: pygments==2.8.0
@@ -91,7 +91,7 @@ setenv =
 deps =
     https://github.com/pyqtgraph/pyqtgraph/archive/refs/heads/master.zip#egg=pyqtgraph
     https://github.com/biolab/orange-canvas-core/archive/refs/heads/master.zip#egg=orange-canvas-core
-    https://github.com/biolab/orange-widget-base/archive/refs/heads/master.zip#egg=orange-widget-base
+    https://github.com/ales-erjavec/orange-widget-base/archive/refs/heads/test-owcsvimport-cleanup.zip#egg=orange-widget-base
     PyQt6==6.5.*
     PyQt6-Qt6==6.5.*
     PyQt6-WebEngine==6.5.*