diff --git a/lodash.js b/lodash.js
index 2b98a1b54..f5b0162e5 100644
--- a/lodash.js
+++ b/lodash.js
@@ -2746,7 +2746,7 @@
       } else {
         n = (predicate == null || thisArg) ? 1 : predicate;
       }
-      n = length - n;
+      n = length - (n || 0);
       return slice(array, 0, n < 0 ? 0 : n);
     }
 
@@ -2840,8 +2840,8 @@
           return array ? array[length - 1] : undefined;
         }
       }
-      n = length - n;
-      return slice(array,  n < 0 ? 0 : n);
+      n = length - (n || 0);
+      return slice(array, n < 0 ? 0 : n);
     }
 
     /**
diff --git a/test/test.js b/test/test.js
index 5c896128d..b3f95a6f0 100644
--- a/test/test.js
+++ b/test/test.js
@@ -2577,14 +2577,14 @@
       deepEqual(_.first(array, 2), [1, 2]);
     });
 
-    test('should return an empty array when `n` < `1`', 3, function() {
-      _.forEach([0, -1, -2], function(n) {
+    test('should return an empty array when `n` < `1`', 4, function() {
+      _.forEach([0, -1, NaN, -Infinity], function(n) {
         deepEqual(_.first(array, n), []);
       });
     });
 
-    test('should return all elements when `n` >= `array.length`', 2, function() {
-      _.forEach([3, 4], function(n) {
+    test('should return all elements when `n` >= `array.length`', 4, function() {
+      _.forEach([3, 4, Math.pow(2, 32), Infinity], function(n) {
         deepEqual(_.first(array, n), array);
       });
     });
@@ -3644,14 +3644,14 @@
       deepEqual(_.initial([]), []);
     });
 
-    test('should return all elements when `n` < `1`', 3, function() {
-      _.forEach([0, -1, -2], function(n) {
+    test('should return all elements when `n` < `1`', 4, function() {
+      _.forEach([0, -1, NaN, -Infinity], function(n) {
         deepEqual(_.initial(array, n), array);
       });
     });
 
-    test('should return an empty array when `n` >= `array.length`', 2, function() {
-      _.forEach([3, 4], function(n) {
+    test('should return an empty array when `n` >= `array.length`', 4, function() {
+      _.forEach([3, 4, Math.pow(2, 32), Infinity], function(n) {
         deepEqual(_.initial(array, n), []);
       });
     });
@@ -5315,14 +5315,14 @@
       deepEqual(_.last(array, 2), [2, 3]);
     });
 
-    test('should return an empty array when `n` < `1`', 3, function() {
-      _.forEach([0, -1, -2], function(n) {
+    test('should return an empty array when `n` < `1`', 4, function() {
+      _.forEach([0, -1, NaN, -Infinity], function(n) {
         deepEqual(_.last(array, n), []);
       });
     });
 
-    test('should return all elements when `n` >= `array.length`', 2, function() {
-      _.forEach([3, 4], function(n) {
+    test('should return all elements when `n` >= `array.length`', 4, function() {
+      _.forEach([3, 4, Math.pow(2, 32), Infinity], function(n) {
         deepEqual(_.last(array, n), array);
       });
     });
@@ -7362,14 +7362,14 @@
       deepEqual(_.rest(array, 2), [3]);
     });
 
-    test('should return all elements when `n` < `1`', 3, function() {
-      _.forEach([0, -1, -2], function(n) {
+    test('should return all elements when `n` < `1`', 4, function() {
+      _.forEach([0, -1, NaN, -Infinity], function(n) {
         deepEqual(_.rest(array, n), [1, 2, 3]);
       });
     });
 
-    test('should return an empty array when `n` >= `array.length`', 2, function() {
-      _.forEach([3, 4], function(n) {
+    test('should return an empty array when `n` >= `array.length`', 4, function() {
+      _.forEach([3, 4, Math.pow(2, 32), Infinity], function(n) {
         deepEqual(_.rest(array, n), []);
       });
     });