chore(ci): small fixups

.github/workflows/image.yml

@@ -3,7 +3,7 @@ name: 'build container images'
 on:
   push:
     branches:
-      - main
+      - master
     tags:
       - '*'
 concurrency:

.github/workflows/tests.yml

@@ -15,7 +15,7 @@ jobs:
       uses: actions/checkout@v2
     - name: Run tests
       run: |
-        make test
+        make tests
         sudo mv coverage/coverage.txt coverage.txt
         sudo chmod 777 coverage.txt