diff --git a/.github/workflows/docker-pull.yml b/.github/workflows/docker-pull.yml
index 8132521..e4f9f4d 100644
--- a/.github/workflows/docker-pull.yml
+++ b/.github/workflows/docker-pull.yml
@@ -45,9 +45,9 @@ jobs:
         id: extract_docker_tag
         shell: bash
         run: |
-          if '${{ steps.extract_branch.outputs.branch }}' -eq "master"; then
+          if [ "${{ steps.extract_branch.outputs.branch }}" == "master" ]; then
             echo "##[set-output name=tag;]$(echo 'latest')"
-          elif [[${{ steps.extract_branch.outputs.branch }} = release_*]]; then
+          elif [[ "${{ steps.extract_branch.outputs.branch }}" == release_* ]]; then
             echo "##[set-output name=tag;]$(echo '${{ steps.extract_branch.outputs.branch }}' | cut -d '_' -f2-)"
           else
             echo "##[set-output name=tag;]$(echo 'ghtest')"