diff --git a/lib/constants/events.js b/lib/constants/events.js
index 4c239dc8d..2471911cf 100644
--- a/lib/constants/events.js
+++ b/lib/constants/events.js
@@ -22,7 +22,6 @@ module.exports = {
     END_STATE: 'endState',
 
     INFO: 'info',
-    WARNING: 'warning',
     ERROR: 'err', // unable to call it `error` because `error` handling is a special case for EventEmitter
 
     TEST_RESULT: 'testResult',
diff --git a/lib/reporters/flat-factory/flat.js b/lib/reporters/flat-factory/flat.js
index 0f11523ac..f86380b9b 100644
--- a/lib/reporters/flat-factory/flat.js
+++ b/lib/reporters/flat-factory/flat.js
@@ -19,7 +19,6 @@ module.exports = class Flat {
         runner.on(Events.UPDATE_RESULT, this._onUpdateResult.bind(this));
         runner.on(Events.RETRY, this._onRetry.bind(this));
         runner.on(Events.ERROR, this._onError.bind(this));
-        runner.on(Events.WARNING, this._onWarning.bind(this));
         runner.on(Events.END, this._onEnd.bind(this));
         runner.on(Events.INFO, this._onInfo.bind(this));
         runner.on(Events.SKIP_STATE, this._onSkipState.bind(this));
@@ -57,13 +56,6 @@ module.exports = class Flat {
         this._logError(result);
     }
 
-    _onWarning(result) {
-        logger.log(`${ICON_WARN} ${this._formatStateInfo(result)}`);
-        logger.warn(result.message);
-
-        this._counter.onSkipped(result);
-    }
-
     _onSkipState(result) {
         const skipReason = result.suite.skipComment
             ? chalk.yellow('reason: ' + result.suite.skipComment)
diff --git a/lib/runner/browser-runner/index.js b/lib/runner/browser-runner/index.js
index cf36f08ae..3ba0975a5 100644
--- a/lib/runner/browser-runner/index.js
+++ b/lib/runner/browser-runner/index.js
@@ -64,7 +64,6 @@ module.exports = class BrowserRunner extends Runner {
             Events.END_STATE,
             Events.TEST_RESULT,
             Events.UPDATE_RESULT,
-            Events.WARNING,
             Events.ERROR,
             Events.RETRY
         ]);
diff --git a/lib/runner/index.js b/lib/runner/index.js
index 98a6a45b7..f3d678f73 100644
--- a/lib/runner/index.js
+++ b/lib/runner/index.js
@@ -83,7 +83,6 @@ module.exports = class TestsRunner extends Runner {
             Events.BEGIN_STATE,
             Events.END_STATE,
             Events.INFO,
-            Events.WARNING,
             Events.ERROR
         ]);
 
diff --git a/lib/runner/suite-runner/insistent-suite-runner.js b/lib/runner/suite-runner/insistent-suite-runner.js
index e65088268..53d2a65f4 100644
--- a/lib/runner/suite-runner/insistent-suite-runner.js
+++ b/lib/runner/suite-runner/insistent-suite-runner.js
@@ -39,8 +39,7 @@ module.exports = class InsistentSuiteRunner extends SuiteRunner {
             Events.BEGIN_STATE,
             Events.SKIP_STATE,
             Events.END_STATE,
-            Events.UPDATE_RESULT,
-            Events.WARNING
+            Events.UPDATE_RESULT
         ]);
 
         return runner;
diff --git a/lib/runner/suite-runner/regular-suite-runner.js b/lib/runner/suite-runner/regular-suite-runner.js
index a58469707..1da170c53 100644
--- a/lib/runner/suite-runner/regular-suite-runner.js
+++ b/lib/runner/suite-runner/regular-suite-runner.js
@@ -103,8 +103,7 @@ module.exports = class RegularSuiteRunner extends SuiteRunner {
             Events.BEGIN_STATE,
             Events.END_STATE,
             Events.TEST_RESULT,
-            Events.UPDATE_RESULT,
-            Events.WARNING
+            Events.UPDATE_RESULT
         ]);
 
         runner.on(Events.ERROR, (e) => {
diff --git a/lib/stats.js b/lib/stats.js
index 5e13fe69c..626b7fdd1 100644
--- a/lib/stats.js
+++ b/lib/stats.js
@@ -9,7 +9,6 @@ const STATS = {
     passed: 'passed',
     failed: 'failed',
     skipped: 'skipped',
-    warned: 'warned',
     retries: 'retries'
 };
 
@@ -25,7 +24,6 @@ module.exports = class Stats {
     attachRunner(runner) {
         runner
             .on(RunnerEvents.SKIP_STATE, (test) => this._addStat(STATS.skipped, test))
-            .on(RunnerEvents.WARNING, (test) => this._addStat(STATS.warned, test))
             .on(RunnerEvents.ERROR, (test) => this._addStat(STATS.failed, test))
             .on(RunnerEvents.UPDATE_RESULT, (test) => {
                 return test.updated ? this._addStat(STATS.updated, test) : this._addStat(STATS.passed, test);
diff --git a/test/unit/gemini.js b/test/unit/gemini.js
index a7e9bd8ce..749f1380c 100644
--- a/test/unit/gemini.js
+++ b/test/unit/gemini.js
@@ -92,7 +92,6 @@ describe('gemini', () => {
         Events.END_STATE,
 
         Events.INFO,
-        Events.WARNING,
         Events.ERROR,
 
         Events.TEST_RESULT,
diff --git a/test/unit/runner/index.js b/test/unit/runner/index.js
index fd5c66128..2d6cf27c9 100644
--- a/test/unit/runner/index.js
+++ b/test/unit/runner/index.js
@@ -467,7 +467,6 @@ describe('runner', () => {
                     Events.BEGIN_STATE,
                     Events.END_STATE,
                     Events.INFO,
-                    Events.WARNING,
                     Events.ERROR
                 ].forEach((event) => testPassthrough(event));
             });
diff --git a/test/unit/runner/suite-runner/insistent-suite-runner.js b/test/unit/runner/suite-runner/insistent-suite-runner.js
index 21b59ab61..e882ca925 100644
--- a/test/unit/runner/suite-runner/insistent-suite-runner.js
+++ b/test/unit/runner/suite-runner/insistent-suite-runner.js
@@ -65,8 +65,7 @@ describe('runner/suite-runner/insistent-suite-runner', () => {
         Events.SKIP_STATE,
         Events.END_STATE,
         Events.TEST_RESULT,
-        Events.UPDATE_RESULT,
-        Events.WARNING
+        Events.UPDATE_RESULT
     ].forEach((stateEvent) => it(`should passthrough ${stateEvent} state`, () => {
         stubWrappedRun_((runner) => runner.emit(stateEvent, {foo: 'bar'}));
         const handler = sinon.spy().named(stateEvent + 'Handler');
@@ -452,7 +451,6 @@ describe('runner/suite-runner/insistent-suite-runner', () => {
                 Events.END_STATE,
                 Events.UPDATE_RESULT,
                 Events.TEST_RESULT,
-                Events.WARNING,
                 Events.ERROR
             ].forEach((event) => {
                 it(`${event}`, () => {
diff --git a/test/unit/stats.js b/test/unit/stats.js
index 7eb35558a..c7add021c 100644
--- a/test/unit/stats.js
+++ b/test/unit/stats.js
@@ -21,12 +21,6 @@ describe('Stats', () => {
         assert.equal(stats.getResult().skipped, 1);
     });
 
-    it('should count warned tests', () => {
-        runner.emit(RunnerEvents.WARNING, makeStateResult());
-
-        assert.equal(stats.getResult().warned, 1);
-    });
-
     it('should count updated tests', () => {
         runner.emit(RunnerEvents.UPDATE_RESULT, makeStateResult({updated: true}));
 
@@ -66,12 +60,6 @@ describe('Stats', () => {
         assert.equal(stats.getResult().passed, 1);
     });
 
-    it('should count warned tests on "WARNING" event', () => {
-        runner.emit(RunnerEvents.WARNING, makeStateResult());
-
-        assert.equal(stats.getResult().warned, 1);
-    });
-
     it('should count total test count', () => {
         runner.emit(RunnerEvents.TEST_RESULT, makeStateResult({equal: false, name: 'first'}));
         runner.emit(RunnerEvents.TEST_RESULT, makeStateResult({equal: true, name: 'second'}));
@@ -86,15 +74,13 @@ describe('Stats', () => {
         runner.emit(RunnerEvents.TEST_RESULT, makeStateResult({equal: false, name: 'failed'}));
         runner.emit(RunnerEvents.ERROR, makeStateResult({name: 'errored'}));
         runner.emit(RunnerEvents.SKIP_STATE, makeStateResult({name: 'skipped'}));
-        runner.emit(RunnerEvents.WARNING, makeStateResult({name: 'warned'}));
 
         assert.deepEqual(stats.getResult(), {
-            total: 6,
+            total: 5,
             updated: 1,
             passed: 1,
             failed: 2,
             skipped: 1,
-            warned: 1,
             retries: 1
         });
     });