diff --git a/src/uu/dd/src/dd.rs b/src/uu/dd/src/dd.rs
index 06e1f399b..b300dff2d 100644
--- a/src/uu/dd/src/dd.rs
+++ b/src/uu/dd/src/dd.rs
@@ -40,7 +40,6 @@ use std::path::Path;
 use std::sync::mpsc;
 #[cfg(target_os = "linux")]
 use std::sync::{atomic::AtomicUsize, atomic::Ordering, Arc};
-use std::sync::mpsc;
 use std::thread;
 use std::time;
 
@@ -48,11 +47,8 @@ const ABOUT: &str = "copy, and optionally convert, a file system resource";
 const BUF_INIT_BYTE: u8 = 0xDD;
 const RTN_SUCCESS: i32 = 0;
 const RTN_FAILURE: i32 = 1;
-const SYSTEM_NEWLINE: &[u8] = if cfg!(target_os = "windows") {
-    b"\r\n"
-} else {
-    b"\n"
-};
+const NEWLINE: u8 = b'\n';
+const SPACE: u8 = b' ';
 
 struct Input<R: Read> {
     src: R,
@@ -495,29 +491,20 @@ impl Output<File> {
 /// Expects ascii encoded data
 fn block(buf: Vec<u8>, cbs: usize, rstat: &mut ReadStat) -> Vec<Vec<u8>> {
     let mut blocks = buf
-        .split(|&e| e == b'\n')
-        .map(|split| {
-            if cfg!(target_os = "windows") {
-                // Since newlines are LF ('\n') in Unix and CR+LF ("\r\n") on Windows,
-                // the split above will leave a trailing CR on Windows.
-                // This must be removed before proceeding.
-                split[..split.len() - 1].to_vec()
-            } else {
-                split.to_vec()
-            }
-        })
+        .split(|&e| e == NEWLINE)
+        .map(|split| split.to_vec())
         .fold(Vec::new(), |mut blocks, mut split| {
             if split.len() > cbs {
                 rstat.records_truncated += 1;
             }
-            split.resize(cbs, b' ');
+            split.resize(cbs, SPACE);
             blocks.push(split);
 
             blocks
         });
 
     if let Some(last) = blocks.last() {
-        if last.iter().all(|&e| e == b' ') {
+        if last.iter().all(|&e| e == SPACE) {
             blocks.pop();
         }
     }
@@ -530,12 +517,12 @@ fn block(buf: Vec<u8>, cbs: usize, rstat: &mut ReadStat) -> Vec<Vec<u8>> {
 /// Expects ascii encoded data
 fn unblock(buf: Vec<u8>, cbs: usize) -> Vec<u8> {
     buf.chunks(cbs).fold(Vec::new(), |mut acc, block| {
-        if let Some(last_char_idx) = block.iter().rposition(|&e| e != b' ') {
+        if let Some(last_char_idx) = block.iter().rposition(|&e| e != SPACE) {
             // Include text up to last space.
             acc.extend(&block[..=last_char_idx]);
         }
 
-        acc.extend(SYSTEM_NEWLINE);
+        acc.push(NEWLINE);
         acc
     })
 }
diff --git a/src/uu/dd/src/dd_unit_tests/block_unblock_tests.rs b/src/uu/dd/src/dd_unit_tests/block_unblock_tests.rs
index 457322b25..96ecc2394 100644
--- a/src/uu/dd/src/dd_unit_tests/block_unblock_tests.rs
+++ b/src/uu/dd/src/dd_unit_tests/block_unblock_tests.rs
@@ -2,9 +2,6 @@
 
 use super::*;
 
-const NL: u8 = b'\n';
-const SPACE: u8 = b' ';
-
 macro_rules! make_block_test (
     ( $test_id:ident, $test_name:expr, $src:expr, $block:expr, $spec:expr ) =>
     {
@@ -97,7 +94,7 @@ fn block_test_no_nl_trunc() {
 fn block_test_nl_gt_cbs_trunc() {
     let mut rs = ReadStat::default();
     let buf = vec![
-        0u8, 1u8, 2u8, 3u8, 4u8, NL, 0u8, 1u8, 2u8, 3u8, 4u8, NL, 5u8, 6u8, 7u8, 8u8,
+        0u8, 1u8, 2u8, 3u8, 4u8, NEWLINE, 0u8, 1u8, 2u8, 3u8, 4u8, NEWLINE, 5u8, 6u8, 7u8, 8u8,
     ];
     let res = block(buf, 4, &mut rs);
 
@@ -118,7 +115,7 @@ fn block_test_nl_gt_cbs_trunc() {
 #[test]
 fn block_test_surrounded_nl() {
     let mut rs = ReadStat::default();
-    let buf = vec![0u8, 1u8, 2u8, 3u8, NL, 4u8, 5u8, 6u8, 7u8, 8u8];
+    let buf = vec![0u8, 1u8, 2u8, 3u8, NEWLINE, 4u8, 5u8, 6u8, 7u8, 8u8];
     let res = block(buf, 8, &mut rs);
 
     assert_eq!(
@@ -133,7 +130,9 @@ fn block_test_surrounded_nl() {
 #[test]
 fn block_test_multiple_nl_same_cbs_block() {
     let mut rs = ReadStat::default();
-    let buf = vec![0u8, 1u8, 2u8, 3u8, NL, 4u8, NL, 5u8, 6u8, 7u8, 8u8, 9u8];
+    let buf = vec![
+        0u8, 1u8, 2u8, 3u8, NEWLINE, 4u8, NEWLINE, 5u8, 6u8, 7u8, 8u8, 9u8,
+    ];
     let res = block(buf, 8, &mut rs);
 
     assert_eq!(
@@ -149,7 +148,9 @@ fn block_test_multiple_nl_same_cbs_block() {
 #[test]
 fn block_test_multiple_nl_diff_cbs_block() {
     let mut rs = ReadStat::default();
-    let buf = vec![0u8, 1u8, 2u8, 3u8, NL, 4u8, 5u8, 6u8, 7u8, NL, 8u8, 9u8];
+    let buf = vec![
+        0u8, 1u8, 2u8, 3u8, NEWLINE, 4u8, 5u8, 6u8, 7u8, NEWLINE, 8u8, 9u8,
+    ];
     let res = block(buf, 8, &mut rs);
 
     assert_eq!(
@@ -165,7 +166,7 @@ fn block_test_multiple_nl_diff_cbs_block() {
 #[test]
 fn block_test_end_nl_diff_cbs_block() {
     let mut rs = ReadStat::default();
-    let buf = vec![0u8, 1u8, 2u8, 3u8, NL];
+    let buf = vec![0u8, 1u8, 2u8, 3u8, NEWLINE];
     let res = block(buf, 4, &mut rs);
 
     assert_eq!(res, vec![vec![0u8, 1u8, 2u8, 3u8],]);
@@ -174,7 +175,7 @@ fn block_test_end_nl_diff_cbs_block() {
 #[test]
 fn block_test_end_nl_same_cbs_block() {
     let mut rs = ReadStat::default();
-    let buf = vec![0u8, 1u8, 2u8, NL];
+    let buf = vec![0u8, 1u8, 2u8, NEWLINE];
     let res = block(buf, 4, &mut rs);
 
     assert_eq!(res, vec![vec![0u8, 1u8, 2u8, SPACE]]);
@@ -183,7 +184,7 @@ fn block_test_end_nl_same_cbs_block() {
 #[test]
 fn block_test_double_end_nl() {
     let mut rs = ReadStat::default();
-    let buf = vec![0u8, 1u8, 2u8, NL, NL];
+    let buf = vec![0u8, 1u8, 2u8, NEWLINE, NEWLINE];
     let res = block(buf, 4, &mut rs);
 
     assert_eq!(
@@ -195,7 +196,7 @@ fn block_test_double_end_nl() {
 #[test]
 fn block_test_start_nl() {
     let mut rs = ReadStat::default();
-    let buf = vec![NL, 0u8, 1u8, 2u8, 3u8];
+    let buf = vec![NEWLINE, 0u8, 1u8, 2u8, 3u8];
     let res = block(buf, 4, &mut rs);
 
     assert_eq!(
@@ -207,7 +208,7 @@ fn block_test_start_nl() {
 #[test]
 fn block_test_double_surrounded_nl_no_trunc() {
     let mut rs = ReadStat::default();
-    let buf = vec![0u8, 1u8, 2u8, 3u8, NL, NL, 4u8, 5u8, 6u8, 7u8];
+    let buf = vec![0u8, 1u8, 2u8, 3u8, NEWLINE, NEWLINE, 4u8, 5u8, 6u8, 7u8];
     let res = block(buf, 8, &mut rs);
 
     assert_eq!(
@@ -223,7 +224,9 @@ fn block_test_double_surrounded_nl_no_trunc() {
 #[test]
 fn block_test_double_surrounded_nl_double_trunc() {
     let mut rs = ReadStat::default();
-    let buf = vec![0u8, 1u8, 2u8, 3u8, NL, NL, 4u8, 5u8, 6u8, 7u8, 8u8];
+    let buf = vec![
+        0u8, 1u8, 2u8, 3u8, NEWLINE, NEWLINE, 4u8, 5u8, 6u8, 7u8, 8u8,
+    ];
     let res = block(buf, 4, &mut rs);
 
     assert_eq!(
@@ -238,38 +241,29 @@ fn block_test_double_surrounded_nl_double_trunc() {
     assert_eq!(rs.records_truncated, 1);
 }
 
+#[cfg(unix)]
 make_block_test!(
     block_cbs16,
     "block-cbs-16",
-    if cfg!(unix) {
-        File::open("./test-resources/dd-block-cbs16.test").unwrap()
-    } else {
-        File::open("./test-resources/dd-block-cbs16-win.test").unwrap()
-    },
+    File::open("./test-resources/dd-block-cbs16.test").unwrap(),
     Some(16),
     File::open("./test-resources/dd-block-cbs16.spec").unwrap()
 );
 
+#[cfg(unix)]
 make_block_test!(
     block_cbs16_as_cbs8,
     "block-cbs-16-as-cbs8",
-    if cfg!(unix) {
-        File::open("./test-resources/dd-block-cbs16.test").unwrap()
-    } else {
-        File::open("./test-resources/dd-block-cbs16-win.test").unwrap()
-    },
+    File::open("./test-resources/dd-block-cbs16.test").unwrap(),
     Some(8),
     File::open("./test-resources/dd-block-cbs8.spec").unwrap()
 );
 
+#[cfg(unix)]
 make_block_test!(
     block_consecutive_nl,
     "block-consecutive-nl",
-    if cfg!(unix) {
-        File::open("./test-resources/dd-block-consecutive-nl.test").unwrap()
-    } else {
-        File::open("./test-resources/dd-block-consecutive-nl-win.test").unwrap()
-    },
+    File::open("./test-resources/dd-block-consecutive-nl.test").unwrap(),
     Some(16),
     File::open("./test-resources/dd-block-consecutive-nl-cbs16.spec").unwrap()
 );
@@ -279,7 +273,7 @@ fn unblock_test_full_cbs() {
     let buf = vec![0u8, 1u8, 2u8, 3u8, 4u8, 5u8, 6u8, 7u8];
     let res = unblock(buf, 8);
 
-    assert_eq!(res, vec![0u8, 1u8, 2u8, 3u8, 4u8, 5u8, 6u8, 7u8, NL],);
+    assert_eq!(res, vec![0u8, 1u8, 2u8, 3u8, 4u8, 5u8, 6u8, 7u8, NEWLINE],);
 }
 
 #[test]
@@ -287,7 +281,7 @@ fn unblock_test_all_space() {
     let buf = vec![SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE];
     let res = unblock(buf, 8);
 
-    assert_eq!(res, vec![NL],);
+    assert_eq!(res, vec![NEWLINE],);
 }
 
 #[test]
@@ -297,7 +291,7 @@ fn unblock_test_decoy_spaces() {
 
     assert_eq!(
         res,
-        vec![0u8, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, 7u8, NL],
+        vec![0u8, SPACE, SPACE, SPACE, SPACE, SPACE, SPACE, 7u8, NEWLINE],
     );
 }
 
@@ -306,7 +300,7 @@ fn unblock_test_strip_single_cbs() {
     let buf = vec![0u8, 1u8, 2u8, 3u8, SPACE, SPACE, SPACE, SPACE];
     let res = unblock(buf, 8);
 
-    assert_eq!(res, vec![0u8, 1u8, 2u8, 3u8, NL],);
+    assert_eq!(res, vec![0u8, 1u8, 2u8, 3u8, NEWLINE],);
 }
 
 #[test]
@@ -324,10 +318,10 @@ fn unblock_test_strip_multi_cbs() {
     let res = unblock(buf, 8);
 
     let exp = vec![
-        vec![0u8, NL],
-        vec![0u8, 1u8, NL],
-        vec![0u8, 1u8, 2u8, NL],
-        vec![0u8, 1u8, 2u8, 3u8, NL],
+        vec![0u8, NEWLINE],
+        vec![0u8, 1u8, NEWLINE],
+        vec![0u8, 1u8, 2u8, NEWLINE],
+        vec![0u8, 1u8, 2u8, 3u8, NEWLINE],
     ]
     .into_iter()
     .flatten()
@@ -336,26 +330,20 @@ fn unblock_test_strip_multi_cbs() {
     assert_eq!(res, exp);
 }
 
+#[cfg(unix)]
 make_unblock_test!(
     unblock_multi_16,
     "unblock-multi-16",
     File::open("./test-resources/dd-unblock-cbs16.test").unwrap(),
     Some(16),
-    if cfg!(unix) {
-        File::open("./test-resources/dd-unblock-cbs16.spec").unwrap()
-    } else {
-        File::open("./test-resources/dd-unblock-cbs16-win.spec").unwrap()
-    }
+    File::open("./test-resources/dd-unblock-cbs16.spec").unwrap()
 );
 
+#[cfg(unix)]
 make_unblock_test!(
     unblock_multi_16_as_8,
     "unblock-multi-16-as-8",
     File::open("./test-resources/dd-unblock-cbs16.test").unwrap(),
     Some(8),
-    if cfg!(unix) {
-        File::open("./test-resources/dd-unblock-cbs8.spec").unwrap()
-    } else {
-        File::open("./test-resources/dd-unblock-cbs8-win.spec").unwrap()
-    }
+    File::open("./test-resources/dd-unblock-cbs8.spec").unwrap()
 );