diff --git a/.github/workflows/pytest.yaml b/.github/workflows/pytest.yaml
index 8df2bee22..2f0fa21d2 100644
--- a/.github/workflows/pytest.yaml
+++ b/.github/workflows/pytest.yaml
@@ -135,13 +135,12 @@ jobs:
       shell: Rscript {0}
 
     - name: Run test suite using pytest
-    # FIXME: Use --numprocesses=auto once flaky tests are fixed
       run: |
         pytest ixmp \
           -m "not performance" \
           --color=yes -rA --verbose \
           --cov-report=xml \
-          --numprocesses=1
+          --numprocesses=auto --dist=loadgroup
       shell: bash
 
     - name: Upload test coverage to Codecov.io