diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index dd6223a..4f25081 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        TEST_ENV: [ubuntu-18.04-llvm-5.0, ubuntu-18.04-llvm-6.0. formatting]       
+        TEST_ENV: [ubuntu-18.04-llvm-5.0, ubuntu-18.04-llvm-6.0, formatting]       
   
     steps:
     - name: Checkout code