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diff --git a/auto_tests/tests/highlight_series_background.js b/auto_tests/tests/highlight_series_background.js
new file mode 100644
index 0000000..d2a09f0
--- /dev/null
+++ b/auto_tests/tests/highlight_series_background.js
@@ -0,0 +1,125 @@
+/**
+ * @fileoverview Tests for the highlightSeriesBackgroundAlpha and
+ * highlightSeriesBackgroundColor options.
+ * @author sergeyslepian@gmail.com
+ */
+
+import Dygraph from '../../src/dygraph';
+import * as utils from '../../src/dygraph-utils';
+import Util from './Util';
+
+describe("highlight-series-background", function() {
+
+  cleanupAfterEach();
+
+  var origRepeatAndCleanup;
+
+  beforeEach(function() {
+    // A "fast" version of repeatAndCleanup
+    origRepeatAndCleanup = utils.repeatAndCleanup;
+    // utils.repeatAndCleanup = function(repeatFn, maxFrames, framePeriodInMillis, cleanupFn) {
+    //   repeatFn(0);
+    //   if (maxFrames > 1) repeatFn(maxFrames - 1);
+    //   cleanupFn();
+    // };
+  });
+
+  afterEach(function() {
+    utils.repeatAndCleanup = origRepeatAndCleanup;
+  });
+
+  function setupGraph(highlightSeriesBackgroundAlpha,
+                      highlightSeriesBackgroundColor) {
+    var opts = {
+      width: 480,
+      height: 320,
+      labels: ['x', 'y'],
+      legend: 'always',
+      highlightSeriesOpts: {
+        strokeWidth: 1,
+        strokeBorderWidth: 1,
+        highlightCircleSize: 1
+      }
+    };
+
+    if (highlightSeriesBackgroundAlpha) utils.update(opts, {highlightSeriesBackgroundAlpha});
+    if (highlightSeriesBackgroundColor) utils.update(opts, {highlightSeriesBackgroundColor});
+
+    var data = [];
+    for (var j = 0; j < 10; j++) {
+      data.push([j, 0]);
+    }
+
+    return new Dygraph('graph', data, opts);
+  }
+
+  it('testDefaultHighlight', function(done) {
+    var graph = setupGraph();
+
+    assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [0,0,0,0]);
+
+    graph.setSelection(0, 'y', true);
+
+    // handle background color fade-in time
+    window.setTimeout(() => {
+      assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [255,255,255,127]);
+      done();
+    }, 500);
+  });
+
+  it('testNoHighlight', function(done) {
+    var graph = setupGraph(1);
+
+    assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [0,0,0,0]);
+
+    graph.setSelection(0, 'y', true);
+
+    // handle background color fade-in time
+    window.setTimeout(() => {
+      assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [0,0,0,0]);
+      done();
+    }, 500);
+  });
+
+  it('testCustomHighlightColor', function(done) {
+    var graph = setupGraph(null, 'rgb(0,255,255)');
+
+    assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [0,0,0,0]);
+
+    graph.setSelection(0, 'y', true);
+
+    // handle background color fade-in time
+    window.setTimeout(() => {
+      assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [0,255,255,127]);
+      done();
+    }, 500);
+  });
+
+  it('testCustomHighlightAlpha', function(done) {
+    var graph = setupGraph(0.3);
+
+    assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [0,0,0,0]);
+
+    graph.setSelection(0, 'y', true);
+
+    // handle background color fade-in time
+    window.setTimeout(() => {
+      assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [255,255,255,179]);
+      done();
+    }, 500);
+  });
+
+  it('testCustomHighlightColorAndAlpha', function(done) {
+    var graph = setupGraph(0.7,'rgb(255,0,0)');
+
+    assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [0,0,0,0]);
+
+    graph.setSelection(0, 'y', true);
+
+    // handle background color fade-in time
+    window.setTimeout(() => {
+      assert.deepEqual(Util.samplePixel(graph.canvas_, 100, 100), [255,0,0,76]);
+      done();
+    }, 500);
+  });
+});