diff --git a/.github/workflows/use-action.yaml b/.github/workflows/use-action.yaml
index 1a683b5..e17752f 100644
--- a/.github/workflows/use-action.yaml
+++ b/.github/workflows/use-action.yaml
@@ -45,7 +45,7 @@ jobs:
           KO_DOCKER_REPO: already-set
       - name: Check pre-set KO_DOCKER_REPO
         run: |
-          if [[ ${KO_DOCKER_REPO} -ne "already-set"]]; then
+          if [[ "${KO_DOCKER_REPO}" != "already-set"]]; then
             echo "${KO_DOCKER_REPO} != already-set"
             exit 1
           fi