diff --git a/types/chance/chance-tests.ts b/types/chance/chance-tests.ts
index a52e719fd9..f00bed253a 100644
--- a/types/chance/chance-tests.ts
+++ b/types/chance/chance-tests.ts
@@ -15,8 +15,10 @@ guid = chance.guid({ version: 4 });
 guid = chance.guid({ version: 5 });
 
 const strArr: string[] = chance.n(chance.string, 42);
+const strArr2: string[] = chance.n((a) => a.value, 42, { value: 'test' });
 
 const uniqInts: number[] = chance.unique(chance.integer, 99);
+const uniqInts2: number[] = chance.unique(a => a.value, 99, { value: 1 });
 
 const currencyPair = chance.currency_pair();
 const firstCurrency = currencyPair[0];
diff --git a/types/chance/index.d.ts b/types/chance/index.d.ts
index 498af7505a..39c18eb47d 100644
--- a/types/chance/index.d.ts
+++ b/types/chance/index.d.ts
@@ -166,13 +166,15 @@ declare namespace Chance {
         d100(): number;
         guid(options?: { version: 4 | 5 }): string;
         hash(opts?: Options): string;
-        n<T>(generator: () => T, count: number, opts?: Options): T[];
+        n<T>(generator: () => T, count: number): T[];
+        n<T, O extends Options>(generator: (options: O) => T, count: number, options: O): T[];
         normal(opts?: Options): number;
         radio(opts?: Options): string;
         rpg(dice: string): number[];
         rpg(dice: string, opts?: Options): number[] | number;
         tv(opts?: Options): string;
-        unique<T>(generator: () => T, count: number, opts?: Options): T[];
+        unique<T>(generator: () => T, count: number): T[];
+        unique<T, O extends Options>(generator: (options: O) => T, count: number, options: O): T[];
         weighted<T>(values: T[], weights: number[]): T;
 
         // "Hidden"