diff --git a/lodash/lodash-tests.ts b/lodash/lodash-tests.ts
index 77a20e2e2..81768861a 100644
--- a/lodash/lodash-tests.ts
+++ b/lodash/lodash-tests.ts
@@ -5736,21 +5736,34 @@ module TestGte {
 }
 
 // _.isArguments
-result = <boolean>_.isArguments(any);
-result = <boolean>_(1).isArguments();
-result = <boolean>_<any>([]).isArguments();
-result = <boolean>_({}).isArguments();
-{
-  let value: IArguments|number = 42;
-  if (_.isArguments(value)) {
-    let length: number = value.length;
-    // compile error
-    // let i: number = value + 1;
-  } else {
-    let i: number = value + 1;
-    // compile error
-    // let length: number = value.length;
-  }
+module TestisArguments {
+    {
+        let value: number|IArguments;
+
+        if (_.isArguments(value)) {
+            let result: IArguments = value;
+        }
+        else {
+            let result: number = value;
+        }
+    }
+
+    {
+        let result: boolean;
+
+        result = _.isArguments(any);
+        result = _(1).isArguments();
+        result = _<any>([]).isArguments();
+        result = _({}).isArguments();
+    }
+
+    {
+        let result: _.LoDashExplicitWrapper<boolean>;
+
+        result = _(1).chain().isArguments();
+        result = _<any>([]).chain().isArguments();
+        result = _({}).chain().isArguments();
+    }
 }
 
 // _.isArray
diff --git a/lodash/lodash.d.ts b/lodash/lodash.d.ts
index c45ec90ee..bc1db24bc 100644
--- a/lodash/lodash.d.ts
+++ b/lodash/lodash.d.ts
@@ -9721,6 +9721,7 @@ declare module _ {
     interface LoDashStatic {
         /**
          * Checks if value is classified as an arguments object.
+         *
          * @param value The value to check.
          * @return Returns true if value is correctly classified, else false.
          */
@@ -9734,6 +9735,13 @@ declare module _ {
         isArguments(): boolean;
     }
 
+    interface LoDashExplicitWrapperBase<T, TWrapper> {
+        /**
+         * @see _.isArguments
+         */
+        isArguments(): LoDashExplicitWrapper<boolean>;
+    }
+
     //_.isArray
     interface LoDashStatic {
         /**