diff --git a/.circleci/config.yml b/.circleci/config.yml
index 8232620e35..bbfdd87fb8 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -154,7 +154,7 @@ jobs:
   test_installation_from_source_test_mode:
     # Test installation from source
     docker:
-      - image: condaforge/mambaforge
+      - image: condaforge/miniforge3
     resource_class: large
     steps:
       - test_installation_from_source
@@ -162,7 +162,7 @@ jobs:
   test_installation_from_source_develop_mode:
     # Test development installation
     docker:
-      - image: condaforge/mambaforge
+      - image: condaforge/miniforge3
     resource_class: large
     steps:
       - test_installation_from_source:
@@ -172,7 +172,7 @@ jobs:
   test_with_upstream_developments:
     # Test with development versions of upstream packages
     docker:
-      - image: condaforge/mambaforge
+      - image: condaforge/miniforge3
     resource_class: large
     steps:
       - test_installation_from_source:
@@ -192,7 +192,7 @@ jobs:
     # Test conda package installation
     working_directory: /esmvaltool
     docker:
-      - image: condaforge/mambaforge
+      - image: condaforge/miniforge3
     resource_class: medium
     steps:
       - run:
@@ -214,7 +214,7 @@ jobs:
   build_documentation:
     # Test building documentation
     docker:
-      - image: condaforge/mambaforge
+      - image: condaforge/miniforge3
     resource_class: medium
     steps:
       - checkout
diff --git a/.github/workflows/create-condalock-file.yml b/.github/workflows/create-condalock-file.yml
index 5e1eaec889..83c9c70c8f 100644
--- a/.github/workflows/create-condalock-file.yml
+++ b/.github/workflows/create-condalock-file.yml
@@ -29,7 +29,6 @@ jobs:
           activate-environment: esmvaltool-fromlock
           python-version: "3.12"
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - name: Update and show conda config
         run: |
diff --git a/.github/workflows/install-from-conda.yml b/.github/workflows/install-from-conda.yml
index 88e78619ea..d77ef193aa 100644
--- a/.github/workflows/install-from-conda.yml
+++ b/.github/workflows/install-from-conda.yml
@@ -49,7 +49,6 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p conda_install_linux_artifacts_python_${{ matrix.python-version }}
       - name: Record versions
@@ -85,7 +84,6 @@ jobs:
           architecture: ${{ matrix.architecture }}
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p conda_install_osx_artifacts_python_${{ matrix.python-version }}
       - name: Record versions
diff --git a/.github/workflows/install-from-pypi.yml b/.github/workflows/install-from-pypi.yml
index 1e326c89eb..bb18afa7c5 100644
--- a/.github/workflows/install-from-pypi.yml
+++ b/.github/workflows/install-from-pypi.yml
@@ -52,7 +52,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p pip_install_linux_artifacts_python_${{ matrix.python-version }}
       - name: Record versions
@@ -90,7 +89,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p pip_install_osx_artifacts_python_${{ matrix.python-version }}
       - name: Record versions
diff --git a/.github/workflows/install-from-source.yml b/.github/workflows/install-from-source.yml
index 7cb8c7d629..0d193bd79a 100644
--- a/.github/workflows/install-from-source.yml
+++ b/.github/workflows/install-from-source.yml
@@ -50,7 +50,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p source_install_linux_artifacts_python_${{ matrix.python-version }}
       - name: Record versions
@@ -89,7 +88,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p source_install_osx_artifacts_python_${{ matrix.python-version }}
       - name: Record versions
diff --git a/.github/workflows/run-tests-monitor.yml b/.github/workflows/run-tests-monitor.yml
index 160bdd2850..27c0853730 100644
--- a/.github/workflows/run-tests-monitor.yml
+++ b/.github/workflows/run-tests-monitor.yml
@@ -35,7 +35,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p test_linux_artifacts_python_${{ matrix.python-version }}
       - run: conda --version 2>&1 | tee test_linux_artifacts_python_${{ matrix.python-version }}/conda_version.txt
@@ -70,7 +69,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p test_osx_artifacts_python_${{ matrix.python-version }}
       - run: conda --version 2>&1 | tee test_osx_artifacts_python_${{ matrix.python-version }}/conda_version.txt
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 73e15c100c..743ac00f45 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -52,7 +52,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p test_linux_artifacts_python_${{ matrix.python-version }}
       - run: conda --version 2>&1 | tee test_linux_artifacts_python_${{ matrix.python-version }}/conda_version.txt
@@ -90,7 +89,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - run: mkdir -p test_osx_artifacts_python_${{ matrix.python-version }}
       - run: conda --version 2>&1 | tee test_osx_artifacts_python_${{ matrix.python-version }}/conda_version.txt