diff --git a/Jenkinsfile b/Jenkinsfile
index d07b78e2..dee60e5d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -34,7 +34,7 @@ pipeline {
                         script: "docker compose -f docker-compose.ci.yml run --rm keygen"
                     ).trim()
                 }
-                sh 'APP_KEY=$APP_KEY docker compose -f docker-compose.ci.yml run --rm app sh -lc "for i in $(seq 1 60); do mysqladmin ping -h ${DB_HOST:-db} -u${DB_USERNAME:-school} -p${DB_PASSWORD:-school} >/dev/null 2>&1 && break; sleep 2; done; php artisan migrate --force && php artisan test"'
+                sh 'APP_KEY=$APP_KEY docker compose -f docker-compose.ci.yml run --rm app sh -lc "for i in \\$(seq 1 60); do mysqladmin ping -h \\${DB_HOST:-db} -u\\${DB_USERNAME:-school} -p\\${DB_PASSWORD:-school} >/dev/null 2>&1 && break; sleep 2; done; php artisan migrate --force && php artisan test"'
             }
         }
     }