diff --git a/.github/workflows/Test_installation_assistant.yml b/.github/workflows/Test_installation_assistant.yml
index c00d8a1..81296f9 100644
--- a/.github/workflows/Test_installation_assistant.yml
+++ b/.github/workflows/Test_installation_assistant.yml
@@ -74,7 +74,7 @@ jobs:
     
     - name: Set COMPOSITE_NAME variable
       run: |
-        case ${{ inputs.SYSTEM }} in
+        case "${{ inputs.SYSTEM }}" in
           "CentOS 7")
             SUBNAME="centos-7"
             ;;