diff --git a/platform/features/timeline/test/actions/CompositionColumnSpec.js b/platform/features/timeline/test/actions/CompositionColumnSpec.js
index 8cf566a080..df52d08db5 100644
--- a/platform/features/timeline/test/actions/CompositionColumnSpec.js
+++ b/platform/features/timeline/test/actions/CompositionColumnSpec.js
@@ -23,13 +23,20 @@
 define(
     ['../../src/actions/CompositionColumn'],
     function (CompositionColumn) {
+        var TEST_IDS = ['a', 'b', 'c', 'd', 'e', 'f'];
+
         describe("CompositionColumn", function () {
             var testIndex,
+                testIdMap,
                 column;
 
             beforeEach(function () {
                 testIndex = 3;
-                column = new CompositionColumn(testIndex);
+                testIdMap = TEST_IDS.reduce(function (map, id, index) {
+                    map[id] = index;
+                    return map;
+                }, {});
+                column = new CompositionColumn(testIndex, testIdMap);
             });
 
             it("includes a one-based index in its name", function () {
@@ -46,15 +53,13 @@ define(
                         'domainObject',
                         ['getId', 'getModel', 'getCapability']
                     );
-                    testModel = {
-                        composition: ['a', 'b', 'c', 'd', 'e', 'f']
-                    };
+                    testModel = { composition: TEST_IDS };
                     mockDomainObject.getModel.andReturn(testModel);
                 });
 
-                it("returns a corresponding identifier", function () {
+                it("returns a corresponding value from the map", function () {
                     expect(column.value(mockDomainObject))
-                        .toEqual(testModel.composition[testIndex]);
+                        .toEqual(testIdMap[testModel.composition[testIndex]]);
                 });
 
                 it("returns nothing when composition is exceeded", function () {
diff --git a/platform/features/timeline/test/actions/IdColumnSpec.js b/platform/features/timeline/test/actions/IdColumnSpec.js
index f44d255255..80b84680a4 100644
--- a/platform/features/timeline/test/actions/IdColumnSpec.js
+++ b/platform/features/timeline/test/actions/IdColumnSpec.js
@@ -24,10 +24,12 @@ define(
     ['../../src/actions/IdColumn'],
     function (IdColumn) {
         describe("IdColumn", function () {
-            var column;
+            var testIdMap,
+                column;
 
             beforeEach(function () {
-                column = new IdColumn();
+                testIdMap = { "foo": "bar" };
+                column = new IdColumn(testIdMap);
             });
 
             it("has a name", function () {
@@ -47,9 +49,9 @@ define(
                     mockDomainObject.getId.andReturn(testId);
                 });
 
-                it("provides a domain object's identifier", function () {
+                it("provides a value mapped from domain object's identifier", function () {
                     expect(column.value(mockDomainObject))
-                        .toEqual(testId);
+                        .toEqual(testIdMap[testId]);
                 });
             });
 
diff --git a/platform/features/timeline/test/actions/ModeColumnSpec.js b/platform/features/timeline/test/actions/ModeColumnSpec.js
index 446e3b1030..b828511266 100644
--- a/platform/features/timeline/test/actions/ModeColumnSpec.js
+++ b/platform/features/timeline/test/actions/ModeColumnSpec.js
@@ -23,13 +23,20 @@
 define(
     ['../../src/actions/ModeColumn'],
     function (ModeColumn) {
+        var TEST_IDS = ['a', 'b', 'c', 'd', 'e', 'f']
+
         describe("ModeColumn", function () {
             var testIndex,
+                testIdMap,
                 column;
 
             beforeEach(function () {
                 testIndex = 3;
-                column = new ModeColumn(testIndex);
+                testIdMap = TEST_IDS.reduce(function (map, id, index) {
+                    map[id] = index;
+                    return map;
+                }, {});
+                column = new ModeColumn(testIndex, testIdMap);
             });
 
             it("includes a one-based index in its name", function () {
@@ -48,15 +55,15 @@ define(
                     );
                     testModel = {
                         relationships: {
-                            modes: ['a', 'b', 'c', 'd', 'e', 'f']
+                            modes: TEST_IDS
                         }
                     };
                     mockDomainObject.getModel.andReturn(testModel);
                 });
 
-                it("returns a corresponding identifier", function () {
+                it("returns a corresponding value from the map", function () {
                     expect(column.value(mockDomainObject))
-                        .toEqual(testModel.relationships.modes[testIndex]);
+                        .toEqual(testIdMap[testModel.relationships.modes[testIndex]]);
                 });
 
                 it("returns nothing when relationships are exceeded", function () {
diff --git a/platform/features/timeline/test/actions/TimelineColumnizerSpec.js b/platform/features/timeline/test/actions/TimelineColumnizerSpec.js
index 3c9b3de7e6..980ed1e6c3 100644
--- a/platform/features/timeline/test/actions/TimelineColumnizerSpec.js
+++ b/platform/features/timeline/test/actions/TimelineColumnizerSpec.js
@@ -94,13 +94,6 @@ define(
                 it("include one row per domain object", function () {
                     expect(rows.length).toEqual(mockDomainObjects.length);
                 });
-
-                it("includes identifiers for each domain object", function () {
-                    rows.forEach(function (row, index) {
-                        var id = mockDomainObjects[index].getId();
-                        expect(row.indexOf(id)).not.toEqual(-1);
-                    });
-                });
             });
 
             describe("headers", function () {