diff --git a/tfjs-backend-webgl/karma.conf.js b/tfjs-backend-webgl/karma.conf.js
index 386a36036b2..577b78e5feb 100644
--- a/tfjs-backend-webgl/karma.conf.js
+++ b/tfjs-backend-webgl/karma.conf.js
@@ -58,13 +58,13 @@ const devConfig = {
   ],
   preprocessors: {'**/*.ts': ['karma-typescript']},
   karmaTypescriptConfig,
-  reporters: ['dots', 'karma-typescript']
+  reporters: ['dots', 'karma-typescript'],
+  singleRun: true
 };
 
 const browserstackConfig = {
   ...devConfig,
   hostname: 'bs-local.com',
-  singleRun: true,
   port: 9886
 };