diff --git a/Cargo.toml b/Cargo.toml
index 39ba507..879d1ba 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rxing"
-version = "0.4.7"
+version = "0.4.8"
 description="A rust port of the zxing barcode library."
 license="Apache-2.0"
 repository="https://github.com/rxing-core/rxing"
diff --git a/benches/benchmarks.rs b/benches/benchmarks.rs
index b5f9166..2c52328 100644
--- a/benches/benchmarks.rs
+++ b/benches/benchmarks.rs
@@ -26,7 +26,7 @@ fn get_image(
 
 fn aztec_benchmark(c: &mut Criterion) {
     let mut image = get_image("test_resources/blackbox/aztec-1/abc-37x37.png");
-    let mut reader = AztecReader::default();
+    let mut reader = AztecReader;
 
     c.bench_function("aztec", |b| {
         b.iter(|| {
@@ -70,7 +70,7 @@ fn code93_benchmark(c: &mut Criterion) {
 
 fn datamatrix_benchmark(c: &mut Criterion) {
     let mut image = get_image("test_resources/blackbox/datamatrix-1/C40.png");
-    let mut reader = DataMatrixReader::default();
+    let mut reader = DataMatrixReader;
 
     c.bench_function("datamatrix", |b| {
         b.iter(|| {
@@ -81,7 +81,7 @@ fn datamatrix_benchmark(c: &mut Criterion) {
 
 fn ean8_benchmark(c: &mut Criterion) {
     let mut image = get_image("test_resources/blackbox/ean8-1/1.png");
-    let mut reader = EAN8Reader::default();
+    let mut reader = EAN8Reader;
 
     c.bench_function("ean8", |b| {
         b.iter(|| {
@@ -92,7 +92,7 @@ fn ean8_benchmark(c: &mut Criterion) {
 
 fn ean13_benchmark(c: &mut Criterion) {
     let mut image = get_image("test_resources/blackbox/ean13-1/1.png");
-    let mut reader = EAN13Reader::default();
+    let mut reader = EAN13Reader;
 
     c.bench_function("ean13", |b| {
         b.iter(|| {
@@ -125,7 +125,7 @@ fn maxicode_benchmark(c: &mut Criterion) {
 
 fn pdf417_benchmark(c: &mut Criterion) {
     let mut image = get_image("test_resources/blackbox/pdf417-1/01.png");
-    let mut reader = PDF417Reader::default();
+    let mut reader = PDF417Reader;
 
     c.bench_function("pdf417", |b| {
         b.iter(|| {
@@ -136,7 +136,7 @@ fn pdf417_benchmark(c: &mut Criterion) {
 
 fn qrcode_benchmark(c: &mut Criterion) {
     let mut image = get_image("test_resources/blackbox/qrcode-2/1.png");
-    let mut reader = QRCodeReader::default();
+    let mut reader = QRCodeReader;
 
     c.bench_function("qrcode", |b| {
         b.iter(|| {
@@ -179,7 +179,7 @@ fn upce_benchmark(c: &mut Criterion) {
     let mut image = get_image("test_resources/blackbox/upce-1/1.png");
     c.bench_function("upce", |b| {
         b.iter(|| {
-            let mut reader = UPCEReader::default();
+            let mut reader = UPCEReader;
             let _res = reader.decode(&mut image);
         });
     });
diff --git a/src/aztec/detector.rs b/src/aztec/detector.rs
index 575ac99..a49b161 100644
--- a/src/aztec/detector.rs
+++ b/src/aztec/detector.rs
@@ -456,7 +456,7 @@ impl<'a> Detector<'_> {
      * diagonal just outside the bull's eye.
      */
     fn sample_grid(&self, image: &BitMatrix, quad: Quadrilateral) -> Result<BitMatrix> {
-        let sampler = DefaultGridSampler::default();
+        let sampler = DefaultGridSampler;
         let dimension = self.get_dimension();
 
         let low = dimension as f32 / 2.0 - self.nb_center_layers as f32;
diff --git a/src/datamatrix/detector/datamatrix_detector.rs b/src/datamatrix/detector/datamatrix_detector.rs
index 4604f25..beef63d 100644
--- a/src/datamatrix/detector/datamatrix_detector.rs
+++ b/src/datamatrix/detector/datamatrix_detector.rs
@@ -333,7 +333,7 @@ impl<'a> Detector<'_> {
         dimensionX: u32,
         dimensionY: u32,
     ) -> Result<BitMatrix> {
-        let sampler = DefaultGridSampler::default();
+        let sampler = DefaultGridSampler;
 
         let dst = Quadrilateral::new(
             point_f(0.5, 0.5),
diff --git a/src/datamatrix/detector/zxing_cpp_detector/cpp_new_detector.rs b/src/datamatrix/detector/zxing_cpp_detector/cpp_new_detector.rs
index b4fa5e6..f2a48f2 100644
--- a/src/datamatrix/detector/zxing_cpp_detector/cpp_new_detector.rs
+++ b/src/datamatrix/detector/zxing_cpp_detector/cpp_new_detector.rs
@@ -214,7 +214,7 @@ fn Scan(
             movedTowardsBy(bl, tl, br, 0.5),
         );
 
-        let grid_sampler = DefaultGridSampler::default();
+        let grid_sampler = DefaultGridSampler;
         // let transform = PerspectiveTransform::quadrilateralToQuadrilateral(x0, y0, x1, y1, x2, y2, x3, y3, x0p, y0p, x1p, y1p, x2p, y2p, x3p, y3p);
         let dst = Quadrilateral::new(
             point_f(0.0, 0.0),
diff --git a/src/maxicode/detector.rs b/src/maxicode/detector.rs
index 428e76a..cfa8e27 100644
--- a/src/maxicode/detector.rs
+++ b/src/maxicode/detector.rs
@@ -332,7 +332,7 @@ pub fn detect(image: &BitMatrix, try_harder: bool) -> Result<MaxicodeDetectionRe
                 return Err(Exceptions::NOT_FOUND)
             }
         };
-        let grid_sampler = DefaultGridSampler::default();
+        let grid_sampler = DefaultGridSampler;
 
         let [tl, bl, tr, br] = symbol_box.0;
 
diff --git a/src/multi_format_reader.rs b/src/multi_format_reader.rs
index 63a7ed3..6b0f1d5 100644
--- a/src/multi_format_reader.rs
+++ b/src/multi_format_reader.rs
@@ -174,25 +174,19 @@ impl MultiFormatReader {
             for possible_format in self.possible_formats.iter() {
                 let res = match possible_format {
                     BarcodeFormat::QR_CODE => {
-                        let cpp = QrReader::default().decode_with_hints(image, &self.hints);
+                        let cpp = QrReader.decode_with_hints(image, &self.hints);
                         if cpp.is_ok() {
                             cpp
                         } else {
-                            QRCodeReader::default().decode_with_hints(image, &self.hints)
+                            QRCodeReader.decode_with_hints(image, &self.hints)
                         }
                     }
-                    BarcodeFormat::MICRO_QR_CODE => {
-                        QrReader::default().decode_with_hints(image, &self.hints)
-                    }
+                    BarcodeFormat::MICRO_QR_CODE => QrReader.decode_with_hints(image, &self.hints),
                     BarcodeFormat::DATA_MATRIX => {
-                        DataMatrixReader::default().decode_with_hints(image, &self.hints)
-                    }
-                    BarcodeFormat::AZTEC => {
-                        AztecReader::default().decode_with_hints(image, &self.hints)
-                    }
-                    BarcodeFormat::PDF_417 => {
-                        PDF417Reader::default().decode_with_hints(image, &self.hints)
+                        DataMatrixReader.decode_with_hints(image, &self.hints)
                     }
+                    BarcodeFormat::AZTEC => AztecReader.decode_with_hints(image, &self.hints),
+                    BarcodeFormat::PDF_417 => PDF417Reader.decode_with_hints(image, &self.hints),
                     BarcodeFormat::MAXICODE => {
                         MaxiCodeReader::default().decode_with_hints(image, &self.hints)
                     }
@@ -214,19 +208,19 @@ impl MultiFormatReader {
                 }
             }
 
-            if let Ok(res) = QrReader::default().decode_with_hints(image, &self.hints) {
+            if let Ok(res) = QrReader.decode_with_hints(image, &self.hints) {
                 return Ok(res);
             }
-            if let Ok(res) = QRCodeReader::default().decode_with_hints(image, &self.hints) {
+            if let Ok(res) = QRCodeReader.decode_with_hints(image, &self.hints) {
                 return Ok(res);
             }
-            if let Ok(res) = DataMatrixReader::default().decode_with_hints(image, &self.hints) {
+            if let Ok(res) = DataMatrixReader.decode_with_hints(image, &self.hints) {
                 return Ok(res);
             }
-            if let Ok(res) = AztecReader::default().decode_with_hints(image, &self.hints) {
+            if let Ok(res) = AztecReader.decode_with_hints(image, &self.hints) {
                 return Ok(res);
             }
-            if let Ok(res) = PDF417Reader::default().decode_with_hints(image, &self.hints) {
+            if let Ok(res) = PDF417Reader.decode_with_hints(image, &self.hints) {
                 return Ok(res);
             }
             if let Ok(res) = MaxiCodeReader::default().decode_with_hints(image, &self.hints) {
diff --git a/src/oned/coda_bar_writer.rs b/src/oned/coda_bar_writer.rs
index 5e08701..d67de79 100644
--- a/src/oned/coda_bar_writer.rs
+++ b/src/oned/coda_bar_writer.rs
@@ -216,7 +216,7 @@ mod CodaBarWriterTestCase {
     }
 
     fn encode(input: &str) -> BitMatrix {
-        CodaBarWriter::default()
+        CodaBarWriter
             .encode(input, &BarcodeFormat::CODABAR, 0, 0)
             .expect("must encode")
     }
diff --git a/src/oned/code_128_writer_test_tase.rs b/src/oned/code_128_writer_test_tase.rs
index fddb687..057ea20 100644
--- a/src/oned/code_128_writer_test_tase.rs
+++ b/src/oned/code_128_writer_test_tase.rs
@@ -470,7 +470,7 @@ fn testEncodeWithForcedCodeSetFailureCodeSetB() {
 }
 
 fn encode(toEncode: &str, compact: bool, expectedLoopback: &str) -> Result<BitMatrix> {
-    let mut reader = Code128Reader::default();
+    let mut reader = Code128Reader;
 
     let mut hints: EncodingHintDictionary = HashMap::new();
     if compact {
diff --git a/src/oned/code_39_writer.rs b/src/oned/code_39_writer.rs
index e6cfd1b..a4ab191 100644
--- a/src/oned/code_39_writer.rs
+++ b/src/oned/code_39_writer.rs
@@ -254,7 +254,7 @@ mod Code39WriterTestCase {
     }
 
     fn doTest(input: &str, expected: &str) {
-        let result = Code39Writer::default()
+        let result = Code39Writer
             .encode(input, &BarcodeFormat::CODE_39, 0, 0)
             .expect("must encode");
         assert_eq!(
diff --git a/src/oned/code_93_writer.rs b/src/oned/code_93_writer.rs
index 2da2579..c92c94f 100644
--- a/src/oned/code_93_writer.rs
+++ b/src/oned/code_93_writer.rs
@@ -265,7 +265,7 @@ mod Code93WriterTestCase {
     }
 
     fn doTest(input: &str, expected: &str) {
-        let result = Code93Writer::default()
+        let result = Code93Writer
             .encode(input, &BarcodeFormat::CODE_93, 0, 0)
             .expect("encode");
         assert_eq!(expected, bit_matrix_test_case::matrix_to_string(&result));
diff --git a/src/oned/ean_13_writer.rs b/src/oned/ean_13_writer.rs
index 3a94b21..3db5e3d 100644
--- a/src/oned/ean_13_writer.rs
+++ b/src/oned/ean_13_writer.rs
@@ -35,7 +35,7 @@ impl UPCEANWriter for EAN13Writer {}
 
 impl OneDimensionalCodeWriter for EAN13Writer {
     fn encode_oned(&self, contents: &str) -> Result<Vec<bool>> {
-        let reader: EAN13Reader = EAN13Reader::default();
+        let reader: EAN13Reader = EAN13Reader;
         let mut contents = contents.to_owned();
         let length = contents.chars().count();
         match length {
@@ -147,7 +147,7 @@ mod EAN13WriterTestCase {
     fn testEncode() {
         let testStr =
         "00001010001011010011101100110010011011110100111010101011001101101100100001010111001001110100010010100000";
-        let result = EAN13Writer::default()
+        let result = EAN13Writer
             .encode(
                 "5901234123457",
                 &BarcodeFormat::EAN_13,
@@ -162,7 +162,7 @@ mod EAN13WriterTestCase {
     fn testAddChecksumAndEncode() {
         let testStr =
         "00001010001011010011101100110010011011110100111010101011001101101100100001010111001001110100010010100000";
-        let result = EAN13Writer::default()
+        let result = EAN13Writer
             .encode(
                 "590123412345",
                 &BarcodeFormat::EAN_13,
@@ -176,7 +176,7 @@ mod EAN13WriterTestCase {
     #[test]
     #[should_panic]
     fn testEncodeIllegalCharacters() {
-        EAN13Writer::default()
+        EAN13Writer
             .encode("5901234123abc", &BarcodeFormat::EAN_13, 0, 0)
             .expect("encode");
     }
diff --git a/src/oned/ean_8_writer.rs b/src/oned/ean_8_writer.rs
index 1553c2f..2ec5f55 100644
--- a/src/oned/ean_8_writer.rs
+++ b/src/oned/ean_8_writer.rs
@@ -45,7 +45,7 @@ impl OneDimensionalCodeWriter for EAN8Writer {
      */
     fn encode_oned(&self, contents: &str) -> Result<Vec<bool>> {
         let length = contents.chars().count();
-        let reader = EAN8Reader::default();
+        let reader = EAN8Reader;
         let mut contents = contents.to_owned();
         match length {
             7 => {
@@ -129,7 +129,7 @@ mod EAN8WriterTestCase {
     fn testEncode() {
         let testStr =
             "0000001010001011010111101111010110111010101001110111001010001001011100101000000";
-        let result = EAN8Writer::default()
+        let result = EAN8Writer
             .encode(
                 "96385074",
                 &BarcodeFormat::EAN_8,
@@ -144,7 +144,7 @@ mod EAN8WriterTestCase {
     fn testAddChecksumAndEncode() {
         let testStr =
             "0000001010001011010111101111010110111010101001110111001010001001011100101000000";
-        let result = EAN8Writer::default()
+        let result = EAN8Writer
             .encode(
                 "9638507",
                 &BarcodeFormat::EAN_8,
@@ -158,7 +158,7 @@ mod EAN8WriterTestCase {
     #[test]
     #[should_panic]
     fn testEncodeIllegalCharacters() {
-        EAN8Writer::default()
+        EAN8Writer
             .encode("96385abc", &BarcodeFormat::EAN_8, 0, 0)
             .expect("ok");
     }
diff --git a/src/oned/itf_writer.rs b/src/oned/itf_writer.rs
index efdd68e..21a91cf 100644
--- a/src/oned/itf_writer.rs
+++ b/src/oned/itf_writer.rs
@@ -119,7 +119,7 @@ mod ITFWriterTestCase {
     }
 
     fn doTest(input: &str, expected: &str) {
-        let result = ITFWriter::default()
+        let result = ITFWriter
             .encode(input, &BarcodeFormat::ITF, 0, 0)
             .expect("encode");
         assert_eq!(expected, bit_matrix_test_case::matrix_to_string(&result));
@@ -129,7 +129,7 @@ mod ITFWriterTestCase {
     #[test]
     #[should_panic]
     fn testEncodeIllegalCharacters() {
-        ITFWriter::default()
+        ITFWriter
             .encode("00123456789abc", &BarcodeFormat::ITF, 0, 0)
             .expect("should fail");
     }
diff --git a/src/oned/multi_format_one_d_reader.rs b/src/oned/multi_format_one_d_reader.rs
index c66e11a..b65d6a6 100644
--- a/src/oned/multi_format_one_d_reader.rs
+++ b/src/oned/multi_format_one_d_reader.rs
@@ -80,7 +80,7 @@ impl OneDReader for MultiFormatOneDReader {
                 }
             }
             if possible_formats.contains(&BarcodeFormat::CODE_128) {
-                if let Ok(res) = Code128Reader::default().decode_row(row_number, row, hints) {
+                if let Ok(res) = Code128Reader.decode_row(row_number, row, hints) {
                     return Ok(res);
                 }
             }
@@ -121,7 +121,7 @@ impl OneDReader for MultiFormatOneDReader {
             if let Ok(res) = Code93Reader::default().decode_row(row_number, row, hints) {
                 return Ok(res);
             }
-            if let Ok(res) = Code128Reader::default().decode_row(row_number, row, hints) {
+            if let Ok(res) = Code128Reader.decode_row(row_number, row, hints) {
                 return Ok(res);
             }
             if let Ok(res) = ITFReader::default().decode_row(row_number, row, hints) {
diff --git a/src/oned/multi_format_upc_ean_reader.rs b/src/oned/multi_format_upc_ean_reader.rs
index 956dbc7..e7f1332 100644
--- a/src/oned/multi_format_upc_ean_reader.rs
+++ b/src/oned/multi_format_upc_ean_reader.rs
@@ -55,7 +55,7 @@ impl OneDReader for MultiFormatUPCEANReader {
         if !possible_formats.is_empty() {
             if possible_formats.contains(&BarcodeFormat::EAN_13) {
                 if let Ok(res) = self.try_decode_function(
-                    &EAN13Reader::default(),
+                    &EAN13Reader,
                     rowNumber,
                     row,
                     hints,
@@ -76,7 +76,7 @@ impl OneDReader for MultiFormatUPCEANReader {
             }
             if possible_formats.contains(&BarcodeFormat::EAN_8) {
                 if let Ok(res) = self.try_decode_function(
-                    &EAN8Reader::default(),
+                    &EAN8Reader,
                     rowNumber,
                     row,
                     hints,
@@ -87,7 +87,7 @@ impl OneDReader for MultiFormatUPCEANReader {
             }
             if possible_formats.contains(&BarcodeFormat::UPC_E) {
                 if let Ok(res) = self.try_decode_function(
-                    &UPCEReader::default(),
+                    &UPCEReader,
                     rowNumber,
                     row,
                     hints,
@@ -97,31 +97,19 @@ impl OneDReader for MultiFormatUPCEANReader {
                 }
             }
         } else {
-            if let Ok(res) = self.try_decode_function(
-                &EAN13Reader::default(),
-                rowNumber,
-                row,
-                hints,
-                &start_guard_pattern,
-            ) {
+            if let Ok(res) =
+                self.try_decode_function(&EAN13Reader, rowNumber, row, hints, &start_guard_pattern)
+            {
                 return Ok(res);
             }
-            if let Ok(res) = self.try_decode_function(
-                &EAN8Reader::default(),
-                rowNumber,
-                row,
-                hints,
-                &start_guard_pattern,
-            ) {
+            if let Ok(res) =
+                self.try_decode_function(&EAN8Reader, rowNumber, row, hints, &start_guard_pattern)
+            {
                 return Ok(res);
             }
-            if let Ok(res) = self.try_decode_function(
-                &UPCEReader::default(),
-                rowNumber,
-                row,
-                hints,
-                &start_guard_pattern,
-            ) {
+            if let Ok(res) =
+                self.try_decode_function(&UPCEReader, rowNumber, row, hints, &start_guard_pattern)
+            {
                 return Ok(res);
             }
         }
diff --git a/src/oned/upc_e_writer.rs b/src/oned/upc_e_writer.rs
index 593e154..e8a204f 100644
--- a/src/oned/upc_e_writer.rs
+++ b/src/oned/upc_e_writer.rs
@@ -41,7 +41,7 @@ impl OneDimensionalCodeWriter for UPCEWriter {
     fn encode_oned(&self, contents: &str) -> Result<Vec<bool>> {
         let length = contents.chars().count();
         let mut contents = contents.to_owned();
-        let reader = UPCEReader::default();
+        let reader = UPCEReader;
         match length {
             7 => {
                 // No check digit present, calculate it and add it
@@ -161,7 +161,7 @@ mod UPCEWriterTestCase {
     }
 
     fn doTest(content: &str, encoding: &str) {
-        let result = UPCEWriter::default()
+        let result = UPCEWriter
             .encode(
                 content,
                 &BarcodeFormat::UPC_E,
@@ -175,7 +175,7 @@ mod UPCEWriterTestCase {
     #[test]
     #[should_panic]
     fn testEncodeIllegalCharacters() {
-        UPCEWriter::default()
+        UPCEWriter
             .encode("05096abc", &BarcodeFormat::UPC_E, 0, 0)
             .expect("ok");
     }
diff --git a/src/pdf417/pdf_417_reader.rs b/src/pdf417/pdf_417_reader.rs
index 27cabf7..77ebc5a 100644
--- a/src/pdf417/pdf_417_reader.rs
+++ b/src/pdf417/pdf_417_reader.rs
@@ -79,7 +79,7 @@ impl MultipleBarcodeReader for PDF417Reader {
 
 impl PDF417Reader {
     pub fn new() -> Self {
-        Self::default()
+        Self
     }
 
     fn decode<B: Binarizer>(
diff --git a/src/pdf417/pdf_417_writer.rs b/src/pdf417/pdf_417_writer.rs
index 4f27f4e..b10a4a5 100644
--- a/src/pdf417/pdf_417_writer.rs
+++ b/src/pdf417/pdf_417_writer.rs
@@ -226,7 +226,7 @@ impl PDF417Writer {
         temp
     }
     pub fn new() -> Self {
-        Self::default()
+        Self
     }
 }
 
diff --git a/src/qrcode/cpp_port/detector.rs b/src/qrcode/cpp_port/detector.rs
index e0a5cf7..fc632bc 100644
--- a/src/qrcode/cpp_port/detector.rs
+++ b/src/qrcode/cpp_port/detector.rs
@@ -766,7 +766,7 @@ pub fn SampleQR(image: &BitMatrix, fp: &FinderPatternSet) -> Result<QRCodeDetect
                 });
             }
         }
-        let grid_sampler = DefaultGridSampler::default();
+        let grid_sampler = DefaultGridSampler;
         let (sampled, rp) =
             grid_sampler.sample_grid(image, dimension as u32, dimension as u32, &rois)?;
         let result = QRCodeDetectorResult::new(sampled, rp.to_vec());
@@ -775,7 +775,7 @@ pub fn SampleQR(image: &BitMatrix, fp: &FinderPatternSet) -> Result<QRCodeDetect
         // #endif
     }
 
-    let grid_sampler = DefaultGridSampler::default();
+    let grid_sampler = DefaultGridSampler;
     let (sampled, rps) = grid_sampler.sample_grid(
         image,
         dimension as u32,
@@ -1050,7 +1050,7 @@ pub fn SampleMQR(image: &BitMatrix, fp: ConcentricPattern) -> Result<QRCodeDetec
         return Err(Exceptions::NOT_FOUND);
     }
 
-    let grid_sampler = DefaultGridSampler::default();
+    let grid_sampler = DefaultGridSampler;
     let (sample, rps) = grid_sampler.sample_grid(
         image,
         dim,
diff --git a/src/qrcode/detector/qrcode_detector.rs b/src/qrcode/detector/qrcode_detector.rs
index 2cffdef..7467a75 100644
--- a/src/qrcode/detector/qrcode_detector.rs
+++ b/src/qrcode/detector/qrcode_detector.rs
@@ -217,7 +217,7 @@ impl<'a> Detector<'_> {
         transform: PerspectiveTransform,
         dimension: u32,
     ) -> Result<BitMatrix> {
-        let sampler = DefaultGridSampler::default();
+        let sampler = DefaultGridSampler;
         let (res, _) = sampler.sample_grid(
             image,
             dimension,
diff --git a/tests/cpp_qr_code_blackbox_tests.rs b/tests/cpp_qr_code_blackbox_tests.rs
index 3964b7c..d068684 100644
--- a/tests/cpp_qr_code_blackbox_tests.rs
+++ b/tests/cpp_qr_code_blackbox_tests.rs
@@ -26,7 +26,7 @@ mod common;
 fn qrcode_black_box1_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/qrcode-1",
-        QrReader::default(),
+        QrReader,
         rxing::BarcodeFormat::QR_CODE,
     );
     // super("src/test/resources/blackbox/qrcode-1", new MultiFormatReader(), BarcodeFormat.QR_CODE);
@@ -68,7 +68,7 @@ fn qrcode_black_box1_test_case() {
 fn qrcode_black_box3_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/qrcode-3",
-        QrReader::default(),
+        QrReader,
         BarcodeFormat::QR_CODE,
     );
     tester.add_test(38, 38, 0.0);
@@ -89,7 +89,7 @@ fn qrcode_black_box3_test_case() {
 fn qrcode_black_box4_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/qrcode-4",
-        QrReader::default(),
+        QrReader,
         // QRCodeReader::new(),
         BarcodeFormat::QR_CODE,
     );
@@ -113,7 +113,7 @@ fn qrcode_black_box4_test_case() {
 fn qrcode_black_box5_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/qrcode-5",
-        QrReader::default(),
+        QrReader,
         BarcodeFormat::QR_CODE,
     );
     tester.add_test(16, 16, 0.0);
@@ -133,7 +133,7 @@ fn qrcode_black_box5_test_case() {
 fn qrcode_black_box6_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/qrcode-6",
-        QrReader::default(),
+        QrReader,
         BarcodeFormat::QR_CODE,
     );
     tester.add_test(15, 15, 0.0);
@@ -148,7 +148,7 @@ fn qrcode_black_box6_test_case() {
 fn mqr_black_box_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/cpp/microqrcode-1",
-        QrReader::default(),
+        QrReader,
         BarcodeFormat::MICRO_QR_CODE,
     );
 
@@ -173,7 +173,7 @@ fn mqr_black_box_test_case() {
 fn cpp_qrcode_black_box1_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/cpp/qrcode-1",
-        QrReader::default(),
+        QrReader,
         rxing::BarcodeFormat::QR_CODE,
     );
     // super("src/test/resources/blackbox/qrcode-1", new MultiFormatReader(), BarcodeFormat.QR_CODE);
@@ -221,7 +221,7 @@ fn cpp_qrcode_black_box2_test_case() {
 fn cpp_qrcode_black_box3_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/cpp/qrcode-3",
-        QrReader::default(),
+        QrReader,
         BarcodeFormat::QR_CODE,
     );
 
@@ -243,7 +243,7 @@ fn cpp_qrcode_black_box3_test_case() {
 fn cpp_qrcode_black_box4_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/cpp/qrcode-4",
-        QrReader::default(),
+        QrReader,
         // QRCodeReader::new(),
         BarcodeFormat::QR_CODE,
     );
@@ -267,7 +267,7 @@ fn cpp_qrcode_black_box4_test_case() {
 fn cpp_qrcode_black_box5_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/cpp/qrcode-5",
-        QrReader::default(),
+        QrReader,
         BarcodeFormat::QR_CODE,
     );
     tester.add_test(16, 16, 0.0);
@@ -287,7 +287,7 @@ fn cpp_qrcode_black_box5_test_case() {
 fn cpp_qrcode_black_box6_test_case() {
     let mut tester = common::AbstractBlackBoxTestCase::new(
         "test_resources/blackbox/cpp/qrcode-6",
-        QrReader::default(),
+        QrReader,
         BarcodeFormat::QR_CODE,
     );
     tester.add_test(15, 15, 0.0);
@@ -302,7 +302,7 @@ fn cpp_qrcode_black_box6_test_case() {
 fn cpp_qrcode_black_box7_test_case() {
     let mut tester = common::MultiImageSpanAbstractBlackBoxTestCase::new(
         "test_resources/blackbox/cpp/qrcode-7",
-        QrReader::default(),
+        QrReader,
         rxing::BarcodeFormat::QR_CODE,
     );
 
diff --git a/tests/pdf_417_black_box_4_testcase.rs b/tests/pdf_417_black_box_4_testcase.rs
index ed45c44..d36c12e 100644
--- a/tests/pdf_417_black_box_4_testcase.rs
+++ b/tests/pdf_417_black_box_4_testcase.rs
@@ -27,7 +27,7 @@ use rxing::pdf417::PDF417Reader;
 fn pdf417_black_box4_test_case() {
     let mut tester = common::MultiImageSpanAbstractBlackBoxTestCase::new(
         "test_resources/blackbox/pdf417-4",
-        PDF417Reader::default(),
+        PDF417Reader,
         rxing::BarcodeFormat::PDF_417,
     );