diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 399dab5..c0ff75b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,9 +2,9 @@ name: build
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
   release:
     types:
       - published
@@ -43,7 +43,7 @@ jobs:
           cd test
           export SKIP_SYNTH_TESTS=1
           export STUB_SIMULATOR=1
-          pytest --workers auto
+          pytest
 
 #-------------------------------------------------------------------------------
   lint:
diff --git a/README.md b/README.md
index 2e8642c..342f252 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 [![Documentation Status](https://readthedocs.org/projects/peakrdl-regblock/badge/?version=latest)](http://peakrdl-regblock.readthedocs.io)
+[![build](https://github.com/SystemRDL/PeakRDL-regblock/workflows/build/badge.svg)](https://github.com/SystemRDL/PeakRDL-regblock/actions?query=workflow%3Abuild+branch%3Amain)
 [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/peakrdl-regblock.svg)](https://pypi.org/project/peakrdl-regblock)
 
 # IMPORTANT