Depending on how you call the logger you receive different number of entries related to logrus in the stacktrace,
[]logrus_bugsnag.stackFrame{
logrus_bugsnag.stackFrame{Method:"(*Entry).Errorf", File:"github.com/Sirupsen/logrus/entry.go", LineNumber:193},
logrus_bugsnag.stackFrame{Method:"(*Logger).Errorf", File:"github.com/Sirupsen/logrus/logger.go", LineNumber:103},
logrus_bugsnag.stackFrame{Method:"TestNoticeReceived", File:"github.com/Shopify/logrus-bugsnag/bugsnag_test.go", LineNumber:70},
logrus_bugsnag.stackFrame{Method:"tRunner", File:"testing/testing.go", LineNumber:473},
logrus_bugsnag.stackFrame{Method:"goexit", File:"runtime/asm_amd64.s", LineNumber:1998}}
[]logrus_bugsnag.stackFrame{
logrus_bugsnag.stackFrame{Method:"(*Logger).Error", File:"github.com/Sirupsen/logrus/logger.go", LineNumber:150},
logrus_bugsnag.stackFrame{Method:"TestNoticeReceived", File:"github.com/Shopify/logrus-bugsnag/bugsnag_test.go", LineNumber:70},
logrus_bugsnag.stackFrame{Method:"tRunner", File:"testing/testing.go", LineNumber:473},
logrus_bugsnag.stackFrame{Method:"goexit", File:"runtime/asm_amd64.s", LineNumber:1998}}
[]logrus_bugsnag.stackFrame{
logrus_bugsnag.stackFrame{Method:"TestNoticeReceived", File:"github.com/Shopify/logrus-bugsnag/bugsnag_test.go", LineNumber:77},
logrus_bugsnag.stackFrame{Method:"tRunner", File:"testing/testing.go", LineNumber:473},
logrus_bugsnag.stackFrame{Method:"goexit", File:"runtime/asm_amd64.s", LineNumber:1998}}