diff --git a/test/metrics.options.test.ts b/test/metrics.options.test.ts
index b30d1dec..71ef2d8a 100644
--- a/test/metrics.options.test.ts
+++ b/test/metrics.options.test.ts
@@ -151,7 +151,9 @@ describe('metrics options', () => {
       const exporter = reader['_exporter'];
       assert(exporter instanceof OTLPHttpProtoMetricExporter);
       assert.deepStrictEqual(
-        exporter._delegate['_transport']['_transport']['_parameters'].headers()['X-SF-TOKEN'],
+        exporter._delegate['_transport']['_transport']['_parameters'].headers()[
+          'X-SF-TOKEN'
+        ],
         'abc'
       );
 
diff --git a/test/utils.ts b/test/utils.ts
index 1ecefb11..61bd0bed 100644
--- a/test/utils.ts
+++ b/test/utils.ts
@@ -145,7 +145,9 @@ export function exporterHeaders(exporter: any) {
   }
 
   if (exporter instanceof OTLPGrpcTraceExporter) {
-    return exporter['_delegate']['_transport']['_parameters'].metadata().toJSON();
+    return exporter['_delegate']['_transport']['_parameters']
+      .metadata()
+      .toJSON();
   }
 
   if (exporter instanceof OTLPMetricExporterBase) {