     }
 
     func testCorrectPunctuation() {
-        var subtitleConverter = try! SubtitleConverter(subtitles: "01:12:33:Ugly ?! , punctuation .")
+        let subtitleConverter = try! SubtitleConverter(subtitles: "01:12:33:Ugly ?! , punctuation .")
         subtitleConverter.correctPunctuation = true
 
         let convertedSubtitles = try! subtitleConverter.convert(to: .tmplayer)

    }

    func testFrameRateRatio() {
        var subtitleConverter = try! SubtitleConverter(subtitles: "[300][600]Text.")
        subtitleConverter.frameRate = 5.0

        subtitleConverter.frameRateRatio = 5.0 // For example: Change Frame Rate from 2.0 to 10.0.

        XCTAssertEqual(try! timeBasedSubtitleConverter.convert(to: .microDVD), "{3600}{7200}Text.")

        // Frame Based format to Time Based format.
        let frameBasedSubtitleConverter = try! SubtitleConverter(subtitles: "{100}{200}Text.")

        frameBasedSubtitleConverter.frameRate = 2.0
        XCTAssertEqual(try! frameBasedSubtitleConverter.convert(to: .microDVD), "{100}{200}Text.")
