diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6d07b79..329e4a7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,15 +17,18 @@ jobs:
     strategy:
       matrix:
         include:
-          - python-version: "3.7.17"
+          - python-version: "3.8"
             os: ubuntu-22.04
             env-file: "test/environment_min.yml"
-          - python-version: "3.12.11"
+          - python-version: "3.12"
             os: ubuntu-24.04
             env-file: "test/environment_max.yml"
 
     name: build-linux
     runs-on: ${{ matrix.os }}
+    defaults:
+      run:
+        shell: bash -el {0}
     steps:
     - uses: actions/checkout@v6
     - name: Checkout test data
@@ -38,14 +41,14 @@ jobs:
       uses: conda-incubator/setup-miniconda@v3
       with:
         python-version: ${{ matrix.python-version }}
-        activate-environment: anaconda-client-env
+        activate-environment: "test-env"
         environment-file: ${{ matrix.env-file }}
         auto-activate: true
     - name: Setup BATS
-      uses: mig4/setup-bats@v4
+      uses: mig4/setup-bats@v1
       with:
         bats-version: 1.2.1
-    - uses: brokenpip3/setup-bats-libs@1.5.2
+    - uses: brokenpip3/setup-bats-libs@0.0.2
       with: 
         support-path: ${{ github.workspace }}/test/test_helper/bats-support
         assert-path: ${{ github.workspace }}/test/test_helper/bats-assert
diff --git a/test/environment_min.yml b/test/environment_min.yml
index 5511755..53bc9c8 100644
--- a/test/environment_min.yml
+++ b/test/environment_min.yml
@@ -8,7 +8,7 @@ channels:
 dependencies:
   - bioconda::mafft=7.407
   - bioconda::mmseqs2=11.e1a1c
-  - python=3.7 # 3.6 needs pip v21 which gives issues
+  - python=3.8 # 3.7 lacks importlib.metadata
   - biopython=1.79
   - ete3=3.1.2
   - numpy=1.18.5