diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1c98f0b..eb4b15d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -24,23 +24,23 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Install poetry
-        uses: Gr1N/setup-poetry@v9
+      - name: Install cli tools
+        run: |
+          python -m pip install --upgrade phosphorus yamk
       - name: Use cache
         uses: actions/cache@v4
         with:
-          path: ~/.cache/pypoetry/virtualenvs
-          key: ${{ runner.os }}-${{ matrix.python-version }}-poetry-${{ hashFiles('pyproject.toml') }}
+          path: ~/.cache/venv-${{ matrix.python-version }}-lint
+          key: ${{ runner.os }}-${{ matrix.python-version }}-lint-${{ hashFiles('pyproject.toml') }}
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip wheel yamk
-          . $(poetry env use python | tail -n 1 | cut -d' ' -f3-)/bin/activate
-          python -m pip install --upgrade pip wheel
-          yam install
+          python -m venv ~/.cache/venv-${{ matrix.python-version }}-lint
+          . ~/.cache/venv-${{ matrix.python-version }}-lint/bin/activate
+          yam install -g main -g lint -g test
       - name: Lint the project
         run: |
-          . $(poetry env use python | tail -n 1 | cut -d' ' -f3-)/bin/activate
-          yam lint
+          . ~/.cache/venv-${{ matrix.python-version }}-lint/bin/activate
+          yam -e lint
   run-unittests:
     runs-on: ubuntu-latest
     strategy:
@@ -58,20 +58,20 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Install poetry
-        uses: Gr1N/setup-poetry@v9
+      - name: Install cli tools
+        run: |
+          python -m pip install --upgrade phosphorus yamk
       - name: Use cache
         uses: actions/cache@v4
         with:
-          path: ~/.cache/pypoetry/virtualenvs
-          key: ${{ runner.os }}-${{ matrix.python-version }}-poetry-${{ hashFiles('pyproject.toml') }}
+          path: ~/.cache/venv-${{ matrix.python-version }}-test
+          key: ${{ runner.os }}-${{ matrix.python-version }}-test-${{ hashFiles('pyproject.toml') }}
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip wheel yamk
-          . $(poetry env use python | tail -n 1 | cut -d' ' -f3-)/bin/activate
-          python -m pip install --upgrade pip wheel
-          yam install
-      - name: Lint the project
+          python -m venv ~/.cache/venv-${{ matrix.python-version }}-test
+          . ~/.cache/venv-${{ matrix.python-version }}-test/bin/activate
+          yam install -g main -g test
+      - name: Test the project
         run: |
-          . $(poetry env use python | tail -n 1 | cut -d' ' -f3-)/bin/activate
-          yam tests
+          . ~/.cache/venv-${{ matrix.python-version }}-test/bin/activate
+          yam -e tests