diff --git a/lib/jasmine-core/jasmine.js b/lib/jasmine-core/jasmine.js
index 18ddf049..65ed7782 100644
--- a/lib/jasmine-core/jasmine.js
+++ b/lib/jasmine-core/jasmine.js
@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2008-2017 Pivotal Labs
+Copyright (c) 2008-2018 Pivotal Labs
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
@@ -2066,6 +2066,7 @@ getJasmineRequireObj().DelayedFunctionScheduler = function() {
     var scheduledFunctions = {};
     var currentTime = 0;
     var delayedFnCount = 0;
+    var deletedKeys = [];
 
     self.tick = function(millis, tickDate) {
       millis = millis || 0;
@@ -2112,6 +2113,8 @@ getJasmineRequireObj().DelayedFunctionScheduler = function() {
     };
 
     self.removeFunctionWithId = function(timeoutKey) {
+      deletedKeys.push(timeoutKey);
+
       for (var runAtMillis in scheduledFunctions) {
         var funcs = scheduledFunctions[runAtMillis];
         var i = indexOfFirstToPass(funcs, function (func) {
@@ -2188,6 +2191,7 @@ getJasmineRequireObj().DelayedFunctionScheduler = function() {
         currentTime = newCurrentTime;
 
         var funcsToRun = scheduledFunctions[currentTime];
+
         delete scheduledFunctions[currentTime];
 
         forEachFunction(funcsToRun, function(funcToRun) {
@@ -2197,8 +2201,13 @@ getJasmineRequireObj().DelayedFunctionScheduler = function() {
         });
 
         forEachFunction(funcsToRun, function(funcToRun) {
+          if (deletedKeys.indexOf(funcToRun.timeoutKey) !== -1) {
+            // skip a timeoutKey deleted whilst we were running
+            return;
+          }
           funcToRun.funcToCall.apply(null, funcToRun.params || []);
         });
+        deletedKeys = [];
       } while (scheduledLookup.length > 0 &&
               // checking first if we're out of time prevents setTimeout(0)
               // scheduled in a funcToRun from forcing an extra iteration
diff --git a/spec/core/ClockSpec.js b/spec/core/ClockSpec.js
index bcce2fa1..2a29e3b5 100644
--- a/spec/core/ClockSpec.js
+++ b/spec/core/ClockSpec.js
@@ -714,4 +714,41 @@ describe("Clock (acceptance)", function() {
 
     expect(actualTimes).toEqual([baseTime.getTime(), baseTime.getTime() + 1, baseTime.getTime() + 3]);
   })
+
+  it('correctly clears a scheduled timeout while the Clock is advancing', function () {
+    var delayedFunctionScheduler = new jasmineUnderTest.DelayedFunctionScheduler(),
+      global = {Date: Date, setTimeout: undefined},
+      mockDate = new jasmineUnderTest.MockDate(global),
+      clock = new jasmineUnderTest.Clock(global, function () { return delayedFunctionScheduler; }, mockDate);
+
+    clock.install();
+
+    var timerId2;
+
+    global.setTimeout(function () {
+      global.clearTimeout(timerId2);
+    }, 100);
+
+    timerId2 = global.setTimeout(fail, 100);
+
+    clock.tick(100);
+  });
+
+  it('correctly clears a scheduled interval while the Clock is advancing', function () {
+    var delayedFunctionScheduler = new jasmineUnderTest.DelayedFunctionScheduler(),
+      global = {Date: Date, setTimeout: undefined},
+      mockDate = new jasmineUnderTest.MockDate(global),
+      clock = new jasmineUnderTest.Clock(global, function () { return delayedFunctionScheduler; }, mockDate);
+
+    clock.install();
+
+    var timerId2;
+    var timerId1 = global.setInterval(function () {
+      global.clearInterval(timerId2);
+    }, 100);
+
+    timerId2 = global.setInterval(fail, 100);
+
+    clock.tick(400);
+  });
 });
diff --git a/spec/core/DelayedFunctionSchedulerSpec.js b/spec/core/DelayedFunctionSchedulerSpec.js
index c26252ef..fa846d6f 100644
--- a/spec/core/DelayedFunctionSchedulerSpec.js
+++ b/spec/core/DelayedFunctionSchedulerSpec.js
@@ -216,21 +216,23 @@ describe("DelayedFunctionScheduler", function() {
 
   it("removes functions during a tick that runs the function", function() {
     var scheduler = new jasmineUnderTest.DelayedFunctionScheduler(),
-      fn = jasmine.createSpy('fn'),
+      spy = jasmine.createSpy('fn'),
+      spyAndRemove = jasmine.createSpy('fn'),
       fnDelay = 10,
       timeoutKey;
 
-    timeoutKey = scheduler.scheduleFunction(fn, fnDelay, [], true);
-    scheduler.scheduleFunction(function () {
+    spyAndRemove.and.callFake(function() {
       scheduler.removeFunctionWithId(timeoutKey);
-    }, 2 * fnDelay);
+    });
 
-    expect(fn).not.toHaveBeenCalled();
+    scheduler.scheduleFunction(spyAndRemove, fnDelay);
 
-    scheduler.tick(3 * fnDelay);
+    timeoutKey = scheduler.scheduleFunction(spy, fnDelay, [], true);
 
-    expect(fn).toHaveBeenCalled();
-    expect(fn.calls.count()).toBe(2);
+    scheduler.tick(2 * fnDelay);
+
+    expect(spy).not.toHaveBeenCalled();
+    expect(spyAndRemove).toHaveBeenCalled();
   });
 
   it("removes functions during the first tick that runs the function", function() {
diff --git a/src/core/DelayedFunctionScheduler.js b/src/core/DelayedFunctionScheduler.js
index 4756b323..73001cc3 100644
--- a/src/core/DelayedFunctionScheduler.js
+++ b/src/core/DelayedFunctionScheduler.js
@@ -5,6 +5,7 @@ getJasmineRequireObj().DelayedFunctionScheduler = function() {
     var scheduledFunctions = {};
     var currentTime = 0;
     var delayedFnCount = 0;
+    var deletedKeys = [];
 
     self.tick = function(millis, tickDate) {
       millis = millis || 0;
@@ -51,6 +52,8 @@ getJasmineRequireObj().DelayedFunctionScheduler = function() {
     };
 
     self.removeFunctionWithId = function(timeoutKey) {
+      deletedKeys.push(timeoutKey);
+
       for (var runAtMillis in scheduledFunctions) {
         var funcs = scheduledFunctions[runAtMillis];
         var i = indexOfFirstToPass(funcs, function (func) {
@@ -127,6 +130,7 @@ getJasmineRequireObj().DelayedFunctionScheduler = function() {
         currentTime = newCurrentTime;
 
         var funcsToRun = scheduledFunctions[currentTime];
+
         delete scheduledFunctions[currentTime];
 
         forEachFunction(funcsToRun, function(funcToRun) {
@@ -136,8 +140,13 @@ getJasmineRequireObj().DelayedFunctionScheduler = function() {
         });
 
         forEachFunction(funcsToRun, function(funcToRun) {
+          if (deletedKeys.indexOf(funcToRun.timeoutKey) !== -1) {
+            // skip a timeoutKey deleted whilst we were running
+            return;
+          }
           funcToRun.funcToCall.apply(null, funcToRun.params || []);
         });
+        deletedKeys = [];
       } while (scheduledLookup.length > 0 &&
               // checking first if we're out of time prevents setTimeout(0)
               // scheduled in a funcToRun from forcing an extra iteration