diff --git a/.github/workflows/test-ubuntu-mamba.yml b/.github/workflows/test-ubuntu-mamba.yml
deleted file mode 100644
index bbc71baf4..000000000
--- a/.github/workflows/test-ubuntu-mamba.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-name: Test with Ubuntu, Mamba
-
-on: [push]
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    strategy:
-      max-parallel: 5
-      fail-fast: false
-      matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11']
-    defaults:
-      run:
-        shell: bash -l {0}
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python from Miniconda/conda
-      uses: conda-incubator/setup-miniconda@v2.2.0
-      with:
-        miniconda-version: latest
-        mamba-version: "*"
-        channels: conda-forge,defaults
-        channel-priority: true
-        activate-environment: anaconda-client-env
-        python-version: ${{ matrix.python-version }}
-    - name: Install conda dependencies
-      run: |
-        printenv
-        mamba install -y -c conda-forge python=${{ matrix.python-version }} numpy=>1.22 scipy=>1.8 matplotlib=>3.6 wxpython
-        mamba install -y -c conda-forge scikit-image scikit-learn pycifrw pandas jupyter plotly pyparsing pytest pytest-cov coverage
-    - name: Install xraylarch and other dependencies with pip
-      run: |
-        pip install lmfit peakutils pyepics pyshortcuts termcolor sphinx dill pycifrw xraydb wxmplot wxutils fabio silx imageio charset-normalizer
-        pip install .
-    - name: Run test suite
-      run: |
-        cd tests
-        python -m pytest
diff --git a/.github/workflows/test-windows-mamba.yml b/.github/workflows/test-windows-mamba.yml
deleted file mode 100644
index 7dfdd43f0..000000000
--- a/.github/workflows/test-windows-mamba.yml
+++ /dev/null
@@ -1,37 +0,0 @@
-name: Test with Windows, Mamba
-
-on: [push]
-
-jobs:
-  build:
-    runs-on: windows-latest
-    strategy:
-      max-parallel: 5
-      fail-fast: false
-      matrix:
-        python-version: ['3.8.10', '3.9', '3.10', '3.11']
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python from Miniconda
-      uses: conda-incubator/setup-miniconda@v2.2.0
-      with:
-        miniconda-version: latest
-        mamba-version: "*"
-        channels: conda-forge,defaults
-        channel-priority: true
-        activate-environment: anaconda-client-env
-        python-version: ${{ matrix.python-version }}
-    - name: Install conda dependencies
-      run: |
-        printenv
-        mamba install -y -c conda-forge python=${{ matrix.python-version }} numpy=>1.22 scipy=>1.8 matplotlib=>3.6 wxpython
-        mamba install -y -c conda-forge scikit-image scikit-learn pycifrw pandas jupyter plotly pyparsing pytest pytest-cov coverage
-    - name: Install xraylarch and other dependencies with pip
-      run: |
-        printenv
-        pip install lmfit peakutils pyepics pyshortcuts termcolor sphinx dill xraydb wxmplot wxutils fabio silx imageio charset-normalizer
-        pip install .
-    - name: Run test suite
-      run: |
-        cd tests
-        python -m pytest
diff --git a/.github/workflows/test-windows.yml b/.github/workflows/test-windows.yml
index efe8e9705..53b08aa38 100644
--- a/.github/workflows/test-windows.yml
+++ b/.github/workflows/test-windows.yml
@@ -16,7 +16,6 @@ jobs:
       uses: conda-incubator/setup-miniconda@v2.2.0
       with:
         miniconda-version: latest
-        mamba-version: "*"
         channels: conda-forge,defaults
         channel-priority: true
         activate-environment: anaconda-client-env