diff --git a/action.yaml b/action.yaml
index 8956b74..dd92de4 100644
--- a/action.yaml
+++ b/action.yaml
@@ -43,7 +43,7 @@ runs:
         if [ "$STRICT" = "true" ]; then
           opts=--strict
         elif [ "$STRICT" != "false" ]; then
-          echo '::error:: the input 'strict' must be "true" or "false"'
+          echo "::error:: the input 'strict' must be \"true\" or \"false\""
           exit 1
         fi
 
@@ -56,22 +56,24 @@ runs:
             if [ -z "$file" ]; then
               continue
             fi
-            echo "===> RENOVATE_CONFIG_FILE=\"$file\" npx --yes --package \"$pkg\" -c \"renovate-config-validator $opts\"" >&2
-            RENOVATE_CONFIG_FILE="$file" npx --yes --package "$pkg" -c "renovate-config-validator $opts"
+            echo "===> npx --yes --package \"$pkg\" -c \"renovate-config-validator $opts $file\"" >&2
+            npx --yes --package "$pkg" -c "renovate-config-validator $opts $file"
           done < <(echo "$CONFIG_FILE_PATH")
           exit 0
-        fi
+        else
 
-        missing=true
-        for file in .github/renovate.json .github/renovate.json5 .gitlab/renovate.json .gitlab/renovate.json5 .renovaterc.json .renovaterc.json5 renovate.json renovate.json5 .renovaterc; do
-          if [ -f "$file" ]; then
-            missing=false
-            echo "===> RENOVATE_CONFIG_FILE=\"$file\" npx --yes --package \"$pkg\" -c \"renovate-config-validator $opts\"" >&2
-            RENOVATE_CONFIG_FILE="$file" npx --yes --package "$pkg" -c "renovate-config-validator $opts"
+          missing=true
+          for file in .github/renovate.json .github/renovate.json5 .gitlab/renovate.json .gitlab/renovate.json5 .renovaterc.json .renovaterc.json5 renovate.json renovate.json5 .renovaterc; do
+            if [ -f "$file" ]; then
+              missing=false
+              echo "===> npx --yes --package \"$pkg\" -c \"renovate-config-validator $opts $file\"" >&2
+              echo "===> RENOVATE_CONFIG_FILE=\"$file\" npx --yes --package \"$pkg\" -c \"renovate-config-validator $opts\"" >&2
+              npx --yes --package "$pkg" -c "renovate-config-validator $opts $file"
+            fi
+          done
+          if [ "$missing" = "true" ]; then
+            echo "===> No configuration file is found" >&2
           fi
-        done
-        if [ "$missing" = "true" ]; then
-          echo "===> No configuration file is found" >&2
         fi
       shell: bash
       env: