diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 07412ef..dd744aa 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.7, 3.8, 3.9]
 
     steps:
     - uses: actions/checkout@v2
@@ -38,4 +38,4 @@ jobs:
     - name: Test code
       run: |
         pip install pytest pytest-cov
-        pytest --cov=$PACKAGE -k "not mne"
+        pytest --cov=$PACKAGE