diff --git a/lodash/lodash-tests.ts b/lodash/lodash-tests.ts
index 00ca144fd..61fb8170e 100644
--- a/lodash/lodash-tests.ts
+++ b/lodash/lodash-tests.ts
@@ -1201,6 +1201,12 @@ result = <boolean>_(1).isArray();
 result = <boolean>_<any>([]).isArray();
 result = <boolean>_({}).isArray();
 
+// _.isDate
+result = <boolean>_.isDate(any);
+result = <boolean>_(42).isDate();
+result = <boolean>_<any>([]).isDate();
+result = <boolean>_({}).isDate();
+
 // _.isEmpty
 result = <boolean>_.isEmpty([1, 2, 3]);
 result = <boolean>_.isEmpty({});
@@ -1441,8 +1447,6 @@ result = <FirstSecond>_.invert({ 'first': 'moe', 'second': 'larry' });
 
 result = <boolean>_.isBoolean(null);
 
-result = <boolean>_.isDate(new Date());
-
 result = <boolean>_.isElement(document.body);
 
 // _.isEqual (alias: _.eq)
diff --git a/lodash/lodash.d.ts b/lodash/lodash.d.ts
index 77daeca2a..8da8a1938 100644
--- a/lodash/lodash.d.ts
+++ b/lodash/lodash.d.ts
@@ -6179,6 +6179,23 @@ declare module _ {
         isArray(): boolean;
     }
 
+    //_.isDate
+    interface LoDashStatic {
+        /**
+         * Checks if value is classified as a Date object.
+         * @param value The value to check.
+         * @return Returns true if value is correctly classified, else false.
+         **/
+        isDate(value?: any): boolean;
+    }
+
+    interface LoDashWrapperBase<T, TWrapper> {
+        /**
+         * @see _.isDate
+         */
+        isDate(): boolean;
+    }
+
     //_.isEmpty
     interface LoDashStatic {
         /**
@@ -6979,16 +6996,6 @@ declare module _ {
         isBoolean(value?: any): boolean;
     }
 
-    //_.isDate
-    interface LoDashStatic {
-        /**
-        * Checks if value is a date.
-        * @param value The value to check.
-        * @return True if the value is a date, else false.
-        **/
-        isDate(value?: any): boolean;
-    }
-
     //_.isElement
     interface LoDashStatic {
         /**