diff --git a/lib/runner/test-runners/cucumber/_setup_cucumber_runner.js b/lib/runner/test-runners/cucumber/_setup_cucumber_runner.js
index ff66b224a3..603a9bdac0 100644
--- a/lib/runner/test-runners/cucumber/_setup_cucumber_runner.js
+++ b/lib/runner/test-runners/cucumber/_setup_cucumber_runner.js
@@ -8,6 +8,8 @@ Before(function({pickle, testCaseStartedId}) {
   const webdriver = {};
 
   process.env.CUCUMBER_TEST_CASE_STARTED_ID = testCaseStartedId;
+  // eslint-disable-next-line no-console
+  console.log('setup_cucumber_before', 'PID:', process.pid, 'testCaseStartedId:', testCaseStartedId);
 
   if (this.parameters['webdriver-host']) {
     webdriver.host = this.parameters['webdriver-host'];
diff --git a/lib/runner/test-runners/cucumber/nightwatch-format.js b/lib/runner/test-runners/cucumber/nightwatch-format.js
index ac13c26a2b..f32e5dde4a 100644
--- a/lib/runner/test-runners/cucumber/nightwatch-format.js
+++ b/lib/runner/test-runners/cucumber/nightwatch-format.js
@@ -27,6 +27,9 @@ module.exports = class NightwatchFormatter extends Formatter {
   static setCapabilities(data) {
     data = {...data, testCaseStartedId: process.env.CUCUMBER_TEST_CASE_STARTED_ID};
 
+    // eslint-disable-next-line no-console
+    console.log('nightwatch_format_set_capability', 'PID:', process.pid, 'testCaseStartedId:', process.env.CUCUMBER_TEST_CASE_STARTED_ID);
+
     if (isFunction(process.send)) {
       process.send({'jsonEnvelope': SafeJSON.stringify({
         session: {
@@ -39,6 +42,9 @@ module.exports = class NightwatchFormatter extends Formatter {
   }
 
   onSessionCapabilities(envelope) {
+    // eslint-disable-next-line no-console
+    console.log('nightwatch_format_onSessionCapabilities', 'PID:', process.pid, 'testCaseStartedId:', envelope.testCaseStartedId);
+
     this.report.session = this.report.session || {};
 
     this.report.session[envelope.testCaseStartedId] = envelope;
@@ -82,6 +88,13 @@ module.exports = class NightwatchFormatter extends Formatter {
     this.report.testCaseFinished = this.report.testCaseFinished || {};
     this.report.testCaseFinished[result.testCaseStartedId] = result;
 
+    if (!this.report.session[result.testCaseStartedId]) {
+      throw new Error('Session capabilities not found for', result.testCaseStartedId);
+    }
+    
+    // eslint-disable-next-line no-console
+    console.log('nightwatch_format_onTestCaseFinished', 'PID:', process.pid, 'testCaseStartedId:', result.testCaseStartedId);
+
     NightwatchEventHub.emit(TestCaseFinished, {
       envelope: result,
       report: this.report