diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 659f576..38c41aa 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -12,8 +12,6 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-20.04]
-        include:
-        - os: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v2