diff --git a/src/js/utils/time-ranges.js b/src/js/utils/time-ranges.js
index e63282217..e848eade4 100644
--- a/src/js/utils/time-ranges.js
+++ b/src/js/utils/time-ranges.js
@@ -2,7 +2,6 @@
  * @file time-ranges.js
  * @module time-ranges
  */
-import log from './log.js';
 
 /**
  * Returns the time for the specified index at the start or end
@@ -51,8 +50,8 @@ import log from './log.js';
  * @throws {Error} if the timeRanges provided are over the maxIndex
  */
 function rangeCheck(fnName, index, maxIndex) {
-  if (index < 0 || index > maxIndex) {
-    throw new Error(`Failed to execute '${fnName}' on 'TimeRanges': The index provided (${index}) is greater than or equal to the maximum bound (${maxIndex}).`);
+  if (typeof index !== 'number' || index < 0 || index > maxIndex) {
+    throw new Error(`Failed to execute '${fnName}' on 'TimeRanges': The index provided (${index}) is non-numeric or out of bounds (0-${maxIndex}).`);
   }
 }
 
@@ -79,10 +78,6 @@ function rangeCheck(fnName, index, maxIndex) {
  * @throws {Error} if rangeIndex is more than the length of ranges
  */
 function getRange(fnName, valueIndex, ranges, rangeIndex) {
-  if (rangeIndex === undefined) {
-    log.warn(`DEPRECATED: Function '${fnName}' on 'TimeRanges' called without an index argument.`);
-    rangeIndex = 0;
-  }
   rangeCheck(fnName, rangeIndex, ranges.length - 1);
   return ranges[rangeIndex][valueIndex];
 }
diff --git a/test/unit/utils/time-ranges.test.js b/test/unit/utils/time-ranges.test.js
index 8971cedd5..68815b5ae 100644
--- a/test/unit/utils/time-ranges.test.js
+++ b/test/unit/utils/time-ranges.test.js
@@ -43,3 +43,22 @@ QUnit.test('should create a fake multiple timerange', function(assert) {
                 /Failed to execute 'end'/,
                 'fails if end is called with with an invalid index');
 });
+
+QUnit.test('should throw without being given an index', function(assert) {
+  const tr = createTimeRanges([
+    [0, 10],
+    [11, 20]
+  ]);
+
+  assert.throws(
+    () => tr.start(),
+    /Failed to execute 'start'/,
+    'start throws if no index is given'
+  );
+
+  assert.throws(
+    () => tr.end(),
+    /Failed to execute 'end'/,
+    'end throws if no index is given'
+  );
+});