diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 7e7218e7..cfde3f5f 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -26,9 +26,6 @@ jobs:
             std: 20
             cxxflags: -DFMT_COMPILE_TIME_CHECKS=1
             os: ubuntu-20.04
-          - cxx: clang++-9
-            std: 11
-            os: ubuntu-18.04
           - cxx: clang++-9
             build_type: Debug
             fuzz: -DFMT_FUZZ=ON -DFMT_FUZZ_LINKMAIN=ON