diff --git a/lodash.js b/lodash.js
index 261a2debb..611876bd6 100644
--- a/lodash.js
+++ b/lodash.js
@@ -2621,29 +2621,33 @@
      * @returns {Array} Returns the new duplicate free array.
      */
     function baseSortedUniq(array, iteratee) {
-      var index = -1,
+      var length = array.length;
+      if (!length) {
+        return [];
+      }
+      var index = 0,
           indexOf = getIndexOf(),
           isCommon = indexOf === baseIndexOf,
-          length = array.length,
-          seen = isCommon ? undefined : [],
-          resIndex = -1,
-          result = [];
+          value = array[0],
+          computed = iteratee ? iteratee(value, 0, array) : value,
+          seen = isCommon ? computed : [computed],
+          resIndex = 0,
+          result = [value];
 
       while (++index < length) {
-        var value = array[index],
-            computed = iteratee ? iteratee(value, index, array) : value;
+        value = array[index],
+        computed = iteratee ? iteratee(value, index, array) : value;
 
-        if (isCommon && value === value) {
-          if (seen !== computed || !index) {
-            seen = computed
-            result[++resIndex] = value;
-          }
-        } else {
-          if (!index || indexOf(seen, computed, 0) < 0) {
-            seen.push(computed);
+        if (isCommon) {
+          if ((value === value ? (seen !== computed) : (indexOf(seen, computed, 0) < 0))) {
+            seen = computed;
             result[++resIndex] = value;
           }
         }
+        else if (indexOf(seen, computed, 0) < 0) {
+          seen[++resIndex] = computed;
+          result[resIndex] = value;
+        }
       }
       return result;
     }
diff --git a/test/test.js b/test/test.js
index 679574a64..da5fae981 100644
--- a/test/test.js
+++ b/test/test.js
@@ -14320,25 +14320,6 @@
 
   /*--------------------------------------------------------------------------*/
 
-  QUnit.module('lodash.sortedUniqBy');
-
-  (function() {
-    var objects = [{ 'a': 2 }, { 'a': 3 }, { 'a': 1 }, { 'a': 2 }, { 'a': 3 }, { 'a': 1 }];
-
-    test('should work with an `iteratee` argument', 1, function() {
-      var array = _.sortBy(objects, 'a'),
-          expected = [objects[2], objects[0], objects[1]];
-
-      var actual = _.sortedUniqBy(array, function(object) {
-        return object.a;
-      });
-
-      deepEqual(actual, expected);
-    });
-  }());
-
-  /*--------------------------------------------------------------------------*/
-
   QUnit.module('lodash.spread');
 
   (function() {
@@ -15964,61 +15945,9 @@
 
   /*--------------------------------------------------------------------------*/
 
-  QUnit.module('lodash.uniqBy');
-
-  (function() {
-    var objects = [{ 'a': 2 }, { 'a': 3 }, { 'a': 1 }, { 'a': 2 }, { 'a': 3 }, { 'a': 1 }];
-
-    test('should work with an `iteratee` argument', 1, function() {
-      var expected = objects.slice(0, 3);
-
-      var actual = _.uniqBy(objects, function(object) {
-        return object.a;
-      });
-
-      deepEqual(actual, expected);
-    });
-
-    test('should provide the correct `iteratee` arguments', 1, function() {
-      var args;
-
-      _.uniqBy(objects, function() {
-        args || (args = slice.call(arguments));
-      });
-
-      deepEqual(args, [objects[0]]);
-    });
-
-    test('should work with a "_.property" style `iteratee`', 2, function() {
-      var actual = _.uniqBy(objects, 'a');
-
-      deepEqual(actual, objects.slice(0, 3));
-
-      var arrays = [[2], [3], [1], [2], [3], [1]];
-      actual = _.uniqBy(arrays, 0);
-
-      deepEqual(actual, arrays.slice(0, 3));
-    });
-
-    _.each({
-      'an array': [0, 'a'],
-      'an object': { '0': 'a' },
-      'a number': 0,
-      'a string': '0'
-    },
-    function(iteratee, key) {
-      test('should work with ' + key + ' for `iteratee`', 1, function() {
-        var actual = _.uniqBy([['a'], ['b'], ['a']], iteratee);
-        deepEqual(actual, [['a'], ['b']]);
-      });
-    });
-  }());
-
-  /*--------------------------------------------------------------------------*/
-
   QUnit.module('uniq methods');
 
-  _.each(['uniq', 'uniqBy'], function(methodName) {
+  _.each(['uniq', 'uniqBy', 'sortedUniq', 'sortedUniqBy'], function(methodName) {
     var func = _[methodName],
         objects = [{ 'a': 2 }, { 'a': 3 }, { 'a': 1 }, { 'a': 2 }, { 'a': 3 }, { 'a': 1 }];
 
@@ -16119,6 +16048,68 @@
 
   /*--------------------------------------------------------------------------*/
 
+  QUnit.module('uniqBy methods');
+
+  _.each(['uniqBy', 'sortedUniqBy'], function(methodName) {
+    var func = _[methodName],
+        isSortedUniqBy = methodName == 'sortedUniqBy',
+        objects = [{ 'a': 2 }, { 'a': 3 }, { 'a': 1 }, { 'a': 2 }, { 'a': 3 }, { 'a': 1 }];
+
+    if (isSortedUniqBy) {
+      objects = _.sortBy(objects, 'a');
+    }
+    test('`_.' + methodName + '` should work with an `iteratee` argument', 1, function() {
+      var expected = isSortedUniqBy ? [{ 'a': 1 }, { 'a': 2 }, { 'a': 3 }] : objects.slice(0, 3);
+
+      var actual = func(objects, function(object) {
+        return object.a;
+      });
+
+      deepEqual(actual, expected);
+    });
+
+    test('`_.' + methodName + '` should provide the correct `iteratee` arguments', 1, function() {
+      var args;
+
+      func(objects, function() {
+        args || (args = slice.call(arguments));
+      });
+
+      deepEqual(args, [objects[0]]);
+    });
+
+    test('`_.' + methodName + '` should work with a "_.property" style `iteratee`', 2, function() {
+      var expected = isSortedUniqBy ? [{ 'a': 1 }, { 'a': 2 }, { 'a': 3 }] : objects.slice(0, 3),
+          actual = func(objects, 'a');
+
+      deepEqual(actual, expected);
+
+      var arrays = [[2], [3], [1], [2], [3], [1]];
+      if (isSortedUniqBy) {
+        arrays = _.sortBy(arrays, 0);
+      }
+      expected = isSortedUniqBy ? [[1], [2], [3]] : arrays.slice(0, 3);
+      actual = func(arrays, 0);
+
+      deepEqual(actual, expected);
+    });
+
+    _.each({
+      'an array': [0, 'a'],
+      'an object': { '0': 'a' },
+      'a number': 0,
+      'a string': '0'
+    },
+    function(iteratee, key) {
+      test('`_.' + methodName + '` should work with ' + key + ' for `iteratee`', 1, function() {
+        var actual = func([['a'], ['a'], ['b']], iteratee);
+        deepEqual(actual, [['a'], ['b']]);
+      });
+    });
+  });
+
+  /*--------------------------------------------------------------------------*/
+
   QUnit.module('lodash.uniqueId');
 
   (function() {