diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index ffebe1d..0b0cd90 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -37,4 +37,5 @@ jobs:
     - name: Test with tox
       run: |
         tox
-      env: ESCPOS_CAPABILITIES_FILE=/home/runner/work/python-escpos/python-escpos/capabilities-data/dist/capabilities.json
+      env:
+        ESCPOS_CAPABILITIES_FILE: /home/runner/work/python-escpos/python-escpos/capabilities-data/dist/capabilities.json