diff --git a/.github/workflows/test-action.yml b/.github/workflows/test-action.yml
index c232074..ec68469 100644
--- a/.github/workflows/test-action.yml
+++ b/.github/workflows/test-action.yml
@@ -10,6 +10,7 @@ jobs:
     strategy:
       matrix:
         os:
+          - 'ubuntu-20.04'
           - 'ubuntu-18.04'
           - 'ubuntu-16.04'
           - 'macos-latest'
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a1a470d..117ff6b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -22,6 +22,7 @@ jobs:
     strategy:
       matrix:
         os:
+          - 'ubuntu-20.04'
           - 'ubuntu-18.04'
           - 'ubuntu-16.04'
           - 'macos-latest'