diff --git a/src/common/cpp_essentials/base_extentions/qrcode_version.rs b/src/common/cpp_essentials/base_extentions/qrcode_version.rs
index e33f9a2..892352f 100644
--- a/src/common/cpp_essentials/base_extentions/qrcode_version.rs
+++ b/src/common/cpp_essentials/base_extentions/qrcode_version.rs
@@ -22,10 +22,10 @@ impl Version {
             //throw std::invalid_argument("Unexpected dimension");
             return Err(Exceptions::ILLEGAL_ARGUMENT);
         }
-        return Self::FromNumber(
+        Self::FromNumber(
             (dimension - Self::DimensionOffset(isMicro)) / Self::DimensionStep(isMicro),
             isMicro,
-        );
+        )
     }
 
     pub fn FromNumber(versionNumber: u32, is_micro: bool) -> Result<VersionRef> {
diff --git a/src/datamatrix/encoder/high_level_encoder.rs b/src/datamatrix/encoder/high_level_encoder.rs
index 897fd27..9c3c78c 100644
--- a/src/datamatrix/encoder/high_level_encoder.rs
+++ b/src/datamatrix/encoder/high_level_encoder.rs
@@ -594,7 +594,7 @@ pub fn determineConsecutiveDigitCount(msg: &str, startpos: u32) -> u32 {
     let len = msg.chars().count(); //len();
     let mut idx = startpos;
     // let graphemes = msg.graphemes(true);
-    while (idx as usize) < len && isDigit(msg.chars().nth(idx as usize).unwrap_or(char::default()))
+    while (idx as usize) < len && isDigit(msg.chars().nth(idx as usize).unwrap_or_default())
     {
         idx += 1;
     }
diff --git a/src/oned/rss/expanded/rss_expanded_stacked_internal_test_case.rs b/src/oned/rss/expanded/rss_expanded_stacked_internal_test_case.rs
index 4b83bf5..4da50ae 100644
--- a/src/oned/rss/expanded/rss_expanded_stacked_internal_test_case.rs
+++ b/src/oned/rss/expanded/rss_expanded_stacked_internal_test_case.rs
@@ -24,8 +24,8 @@
  *   http://www.piramidepse.com/
  */
 
-use crate::common::Result;
-use crate::{oned::rss::expanded::ExpandedPair, Reader};
+
+use crate::{Reader};
 
 use super::{test_case_util, RSSExpandedReader};