diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 6e2d0c1..cf03675 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -45,7 +45,7 @@ jobs:
       - name: Install dependencies
         if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
         run: |
-          poetry install --no-interaction --with dev --all-extras
+          poetry install --no-interaction --no-root --with dev --all-extras
           poetry add tox-gh-actions
 
       - name: test with tox (uses tox-gh-actions to select correct environment)
diff --git a/setup.cfg b/setup.cfg
index 10699ca..7b549a9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -45,9 +45,8 @@ envlist = py39, py310, format, lint, build
 
 [gh-actions]
 python =
-    3.10: py310,
-    3.9: py39,
-    format, lint, build
+    3.10: py310
+    3.9: py39, format, lint, build
 
 [testenv]
 allowlist_externals = pytest