diff --git a/.github/workflows/linux_llvm_cov.yml b/.github/workflows/linux_llvm_cov.yml
index 56b9a4f..fae9186 100644
--- a/.github/workflows/linux_llvm_cov.yml
+++ b/.github/workflows/linux_llvm_cov.yml
@@ -4,6 +4,7 @@ on:
   pull_request_target:
     branches:
       - master
+      - cpp20
 
 jobs:
   build: