diff --git a/.github/workflows/run-tests-push.yml b/.github/workflows/run-tests-push.yml
index 7c1e5b8a..224c5ae9 100644
--- a/.github/workflows/run-tests-push.yml
+++ b/.github/workflows/run-tests-push.yml
@@ -19,7 +19,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - shell: bash -l {0}
         run: conda --version
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 729588a7..7b6937df 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -24,7 +24,6 @@ jobs:
           environment-file: environment.yml
           python-version: ${{ matrix.python-version }}
           miniforge-version: "latest"
-          miniforge-variant: Mambaforge
           use-mamba: true
       - shell: bash -l {0}
         run: conda --version