                 
                 let png_image = AnyImage(imageRep: imageRep.page(i))
                 
-                guard let tiff_image = try? AnyImage(contentsOf: image.deletingPathExtension().appendingPathComponent("\(i).tif")) else { XCTFail(); return }
+                let tiff_image = try AnyImage(contentsOf: image.deletingPathExtension().appendingPathComponent("\(i).tif"))
                 
                 XCTAssertEqual(png_image.width, tiff_image.width)
                 XCTAssertEqual(png_image.height, tiff_image.height)

            RawBitmap.Channel(index: 0, format: .unsigned, endianness: .big, bitRange: 1..<6),
            RawBitmap.Channel(index: 1, format: .unsigned, endianness: .big, bitRange: 6..<11),
            RawBitmap.Channel(index: 2, format: .unsigned, endianness: .big, bitRange: 11..<16),
            ], data: data)
        
        let image = AnyImage(width: width, height: height, colorSpace: AnyColorSpace.sRGB, bitmaps: [bitmap], premultiplied: false, fileBacked: false).base as? Image<RGBA32ColorPixel>
        

            RawBitmap.Channel(index: 1, format: .unsigned, endianness: .big, bitRange: 16..<32),
            RawBitmap.Channel(index: 2, format: .unsigned, endianness: .big, bitRange: 32..<48),
            RawBitmap.Channel(index: 3, format: .unsigned, endianness: .big, bitRange: 48..<64),
        ], data: data)
        
        let image = AnyImage(width: width, height: height, colorSpace: AnyColorSpace.sRGB, bitmaps: [bitmap], premultiplied: false, fileBacked: false).base as? Image<RGBA64ColorPixel>
        
