diff --git a/Tests/SwiftyJSONTests/PrintableTests.swift b/Tests/SwiftyJSONTests/PrintableTests.swift
index f60fc8c1..df2e2a56 100644
--- a/Tests/SwiftyJSONTests/PrintableTests.swift
+++ b/Tests/SwiftyJSONTests/PrintableTests.swift
@@ -117,8 +117,52 @@ class PrintableTests: XCTestCase {
 		description = description.replacingOccurrences(of: "\n", with: "")
         description = description.replacingOccurrences(of: " ", with: "")
         XCTAssertTrue(json.description.lengthOfBytes(using: String.Encoding.utf8) > 0)
-        XCTAssertTrue(description.range(of: "\"1\":2", options: NSString.CompareOptions.caseInsensitive) != nil)
-        XCTAssertTrue(description.range(of: "\"2\":\"two\"", options: NSString.CompareOptions.caseInsensitive) != nil)
-        XCTAssertTrue(description.range(of: "\"3\":null", options: NSString.CompareOptions.caseInsensitive) != nil)
-    }
+        XCTAssertTrue(description.range(
+            of: "\"1\":2",
+            options: NSString.CompareOptions.caseInsensitive) != nil
+        )
+        XCTAssertTrue(description.range(
+            of: "\"2\":\"two\"",
+            options: NSString.CompareOptions.caseInsensitive) != nil
+        )
+        XCTAssertTrue(description.range(
+            of: "\"3\":null",
+            options: NSString.CompareOptions.caseInsensitive) != nil
+        )
+	}
+
+	func testJson() {
+		let dictionary = [
+            "1": 2,
+            "2": 2,
+            "three": 3,
+            "list": ["aa", "bb", "dd"],
+            "foo": [],
+        ] as NSDictionary
+		let json = JSON(dictionary)
+		guard var description = json.rawString([.castNilToNSNull: true]) else {
+			XCTFail("could not represent dictionary")
+			return
+		}
+		description = description.replacingOccurrences(of: "\n", with: "")
+		description = description.replacingOccurrences(of: " ", with: "")
+
+		let dict2 = ["json": json, "baa": "boo"] as [String: Any?]
+		let json2 = JSON(dict2)
+
+		guard var description2 = json2.rawString([.castNilToNSNull: true]) else {
+			XCTFail("could not represent json")
+			return
+		}
+		description2 = description2.replacingOccurrences(of: "\n", with: "")
+		description2 = description2.replacingOccurrences(of: " ", with: "")
+		XCTAssertTrue(description2.range(
+            of: "\"json\":{",
+            options: NSString.CompareOptions.caseInsensitive
+        ) != nil)
+		XCTAssertTrue(description2.range(
+            of: description,
+            options: NSString.CompareOptions.caseInsensitive
+        ) != nil)
+	}
 }