diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 1a94551e..7b3ebb1f 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -4,7 +4,6 @@ jobs:
   tests:
     runs-on: ubuntu-16.04
     strategy:
-      max-parallel: 1
       matrix:
         python-version: ['3.6', '3.7', '3.8']
     name: Python ${{ matrix.python-version }}