diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9350e6f6..54ddf70b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -19,47 +19,27 @@ jobs:
     env:
       coverage: ${{ matrix.os == 'ubuntu-latest' && matrix.python-version == '3.8' }}
     steps:
-    - uses: actions/checkout@v2
-    - uses: conda-incubator/setup-miniconda@v2
-      with:
-        activate-environment: ''
-        auto-activate-base: true
-        auto-update-conda: true
-        channels: conda-forge
+    - name: Check out repository
+      uses: actions/checkout@v2
     - name: Install poetry
       uses: snok/install-poetry@v1
-    - name: Export poetry requirements
-      shell: bash -l {0}
-      run: |
-        poetry export -o requirements.txt --without-hashes
-        poetry export -o constraints.txt --dev --without-hashes
-    - name: Create test conda environment
-      shell: bash -l {0}
-      run: |
-        conda create -n test -y python=${{ matrix.python-version }}
-    - name: Install lint dependencies
+    - name: Install conda environment
+      uses: mamba-org/setup-micromamba@v1
+      with:
+        environment-name: test
+        create-args: >-
+          python=${{ matrix.python-version }}
+          gdal=3.2.0
+    - name: Install dependencies
       shell: bash -l {0}
       run: |
         conda activate test
-        pip install --constraint=constraints.txt flake8 flake8-annotations flake8-black flake8-docstrings flake8-isort
+        poetry install --no-interaction --all-extras
     - name: Lint
       shell: bash -l {0}
       run: |
         conda activate test
         flake8 src tests
-    - name: Install test dependencies
-      shell: bash -l {0}
-      run: |
-        conda activate test
-        conda install -y gdal=3.2.0
-        pip install --constraint=constraints.txt -r requirements.txt
-        pip install --constraint=constraints.txt pytest
-    - name: Install coverage dependencies
-      if: env.coverage == 'true'
-      shell: bash -l {0}
-      run: |
-        conda activate test
-        pip install --constraint=constraints.txt pytest-cov coverage[toml] codecov
     - name: Test
       if: env.coverage == 'false'
       shell: bash -l {0}