Explicitly resume stream after adding listener

services/filestore/test/acceptance/js/FilestoreTests.js

@@ -36,6 +36,7 @@ function streamToString(stream) {
     stream.on('data', chunk => chunks.push(chunk))
     stream.on('error', reject)
     stream.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')))
+    stream.resume()
   })
 }