diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index f79396c6..e1d7ab3f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -44,7 +44,7 @@ jobs:
       
       - name: Run unit tests with pytest
         run: |
-          pytest -m 'not snowglobes'
+          pytest -m 'not snowglobes' -m 'not BEMEWS'
 
       - name: Build HTML docs
         run: |
diff --git a/pytest.ini b/pytest.ini
index 78fad96d..eb41bec5 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -3,5 +3,6 @@ markers=
     snowglobes: tests that require SNOwGLoBES installed
     crosscheck: integration tests for comparison with reference output
     timing: benchmark testing of the function execution time
+    BEMEWS: use external BEMEWS package for calculation of EarthMatter effect