diff --git a/packages/fast-stable-stringify/src/__tests__/index-test.ts b/packages/fast-stable-stringify/src/__tests__/index-test.ts
index 4014d247f174..0759913ed408 100644
--- a/packages/fast-stable-stringify/src/__tests__/index-test.ts
+++ b/packages/fast-stable-stringify/src/__tests__/index-test.ts
@@ -196,11 +196,9 @@ describe('fastStableStringify', function () {
         expect(stringify(value)).toBe(jsonStableStringify(value));
     });
     it('hashes bigints', function () {
-        expect(stringify(200n)).toMatch('"200"n');
-        expect(stringify({ foo: 100n })).toMatch('{"foo":"100"n}');
-        expect(stringify({ age: BigInt(100n), name: 'Hrushi' })).toMatch('{"age":"100"n,"name":"Hrushi"}');
-        expect(stringify({ age: [BigInt(100n), BigInt(200n), BigInt(300n)] })).toMatch(
-            '{"age":["100"n,"200"n,"300"n]}',
-        );
+        expect(stringify(200n)).toMatch('200n');
+        expect(stringify({ foo: 100n, goo: '100n' })).toMatch('{"foo":100n,"goo":"100n"}');
+        expect(stringify({ age: BigInt(100n), name: 'Hrushi' })).toMatch('{"age":100n,"name":"Hrushi"}');
+        expect(stringify({ age: [BigInt(100n), BigInt(200n), BigInt(300n)] })).toMatch('{"age":[100n,200n,300n]}');
     });
 });
diff --git a/packages/fast-stable-stringify/src/index.ts b/packages/fast-stable-stringify/src/index.ts
index fcccf1a884dd..ea3a4c3cd9ff 100644
--- a/packages/fast-stable-stringify/src/index.ts
+++ b/packages/fast-stable-stringify/src/index.ts
@@ -61,7 +61,7 @@ function stringify(val: unknown, isArrayProp: boolean) {
         case 'undefined':
             return isArrayProp ? null : undefined;
         case 'bigint':
-            return JSON.stringify(val.toString()) + 'n';
+            return `${val.toString()}n`;
         case 'string':
             return JSON.stringify(val);
         default: