diff --git a/tools/run_tests/performance/run_worker_node.sh b/tools/run_tests/performance/run_worker_node.sh
index 0278beac237..2511522c711 100644
--- a/tools/run_tests/performance/run_worker_node.sh
+++ b/tools/run_tests/performance/run_worker_node.sh
@@ -27,4 +27,4 @@ cd "$(dirname "$0")/../../.."
 # Enter the grpc-node repo root (expected to be next to grpc repo root)
 cd ../grpc-node
 
-node -r test/fixtures/$fixture.js tools/run_tests/performance/worker.js $@
+node -r "test/fixtures/$fixture.js" tools/run_tests/performance/worker.js "$@"
diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index b683f2d01d5..dde299ae36b 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -1150,6 +1150,7 @@ class GoLanguage:
     def __str__(self):
         return 'go'
 
+
 class NodeLanguage:
 
     def __init__(self, node_purejs=False):
@@ -1163,7 +1164,7 @@ class NodeLanguage:
 
     def worker_port_offset(self):
         if self.node_purejs:
-          return 1100
+            return 1100
         return 1000
 
     def scenarios(self):
@@ -1246,6 +1247,7 @@ class NodeLanguage:
             return 'node_purejs'
         return 'node'
 
+
 LANGUAGES = {
     'c++': CXXLanguage(),
     'csharp': CSharpLanguage(),