diff --git a/platform/features/plot/test/elements/PlotLimitTrackerSpec.js b/platform/features/plot/test/elements/PlotLimitTrackerSpec.js
new file mode 100644
index 0000000000..1ba428115f
--- /dev/null
+++ b/platform/features/plot/test/elements/PlotLimitTrackerSpec.js
@@ -0,0 +1,103 @@
+/*****************************************************************************
+ * Open MCT Web, Copyright (c) 2014-2015, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT Web is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT Web includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+/*global define,Promise,describe,it,expect,beforeEach,waitsFor,jasmine*/
+
+define(
+    ["../../src/elements/PlotLimitTracker"],
+    function (PlotLimitTracker) {
+        "use strict";
+
+        describe("A plot's limit tracker", function () {
+            var mockHandle,
+                testRange,
+                mockTelemetryObjects,
+                testData,
+                mockLimitCapabilities,
+                tracker;
+
+            beforeEach(function () {
+                testRange = "some-range";
+                testData = {};
+                mockHandle = jasmine.createSpyObj(
+                    'handle',
+                    ['getTelemetryObjects', 'getDatum']
+                );
+                mockTelemetryObjects = ['a', 'b', 'c'].map(function (id, i) {
+                    var mockTelemetryObject = jasmine.createSpyObj(
+                            'object-' + id,
+                            [ 'getId', 'getCapability', 'getModel' ]
+                        ),
+                        mockLimitCapability = jasmine.createSpyObj(
+                            'limit-' + id,
+                            [ 'evaluate' ]
+                        );
+                    testData[id] = { id: id, value: i };
+                    mockTelemetryObject.getId.andReturn(id);
+                    mockTelemetryObject.getCapability.andCallFake(function (key) {
+                        return key === 'limit' && mockLimitCapability;
+                    });
+                    mockLimitCapability.evaluate
+                        .andReturn({ cssClass: 'alarm-' + id});
+                    return mockTelemetryObject;
+                });
+                mockHandle.getTelemetryObjects.andReturn(mockTelemetryObjects);
+                mockHandle.getDatum.andCallFake(function (telemetryObject) {
+                    return testData[telemetryObject.getId()];
+                });
+
+                tracker = new PlotLimitTracker(mockHandle, testRange);
+            });
+
+            it("initially provides no limit state", function () {
+                mockTelemetryObjects.forEach(function (mockTelemetryObject) {
+                    expect(tracker.getLegendClass(mockTelemetryObject))
+                        .toBeUndefined();
+                });
+            });
+
+            describe("when asked to update", function () {
+                beforeEach(function () {
+                    tracker.update();
+                });
+
+                it("evaluates limits using the limit capability", function () {
+                    mockTelemetryObjects.forEach(function (mockTelemetryObject) {
+                        var id = mockTelemetryObject.getId(),
+                            mockLimit =
+                                mockTelemetryObject.getCapability('limit');
+                        expect(mockLimit.evaluate)
+                            .toHaveBeenCalledWith(testData[id], testRange);
+                    });
+                });
+
+                it("exposes legend classes returned by the limit capability", function () {
+                    mockTelemetryObjects.forEach(function (mockTelemetryObject) {
+                        var id = mockTelemetryObject.getId();
+                        expect(tracker.getLegendClass(mockTelemetryObject))
+                            .toEqual('alarm-' + id);
+                    });
+                });
+            });
+
+        });
+    }
+);
diff --git a/platform/features/plot/test/suite.json b/platform/features/plot/test/suite.json
index 92dfcb1e8a..cec8798d77 100644
--- a/platform/features/plot/test/suite.json
+++ b/platform/features/plot/test/suite.json
@@ -6,6 +6,7 @@
     "SubPlot",
     "SubPlotFactory",
     "elements/PlotAxis",
+    "elements/PlotLimitTracker",
     "elements/PlotLine",
     "elements/PlotLineBuffer",
     "elements/PlotPalette",