diff --git a/cat/test.rs b/cat/test.rs
index 6524ddda9..9b2db581e 100644
--- a/cat/test.rs
+++ b/cat/test.rs
@@ -22,7 +22,7 @@ fn test_output_multi_files_print_all_chars() {
 fn test_stdin_squeeze() {
     let mut process= Command::new("build/cat").arg("-A").spawn().unwrap();
 
-    process.stdin.take_unwrap().write(bytes!("\x00\x01\x02")).unwrap();
+    process.stdin.take_unwrap().write(b"\x00\x01\x02").unwrap();
     let po = process.wait_with_output().unwrap();
     let out = str::from_utf8(po.output.as_slice()).unwrap();
 
@@ -33,7 +33,7 @@ fn test_stdin_squeeze() {
 fn test_stdin_number_non_blank() {
     let mut process = Command::new("build/cat").arg("-b").arg("-").spawn().unwrap();
 
-    process.stdin.take_unwrap().write(bytes!("\na\nb\n\n\nc")).unwrap();
+    process.stdin.take_unwrap().write(b"\na\nb\n\n\nc").unwrap();
     let po = process.wait_with_output().unwrap();
     let out =  str::from_utf8(po.output.as_slice()).unwrap();
 
diff --git a/nl/test.rs b/nl/test.rs
index 9ed7668bb..80f95e687 100644
--- a/nl/test.rs
+++ b/nl/test.rs
@@ -5,7 +5,7 @@ use std::str;
 fn test_stdin_nonewline() {
     
     let mut process = Command::new("build/nl").spawn().unwrap();
-    process.stdin.take_unwrap().write(bytes!("No Newline")).unwrap();
+    process.stdin.take_unwrap().write(b"No Newline").unwrap();
     let po = process.wait_with_output().unwrap();
     let out =  str::from_utf8(po.output.as_slice()).unwrap();
 
@@ -17,7 +17,7 @@ fn test_stdin_newline() {
     let mut process = Command::new("build/nl").arg("-s").arg("-")
         .arg("-w").arg("1").spawn().unwrap();
 
-    process.stdin.take_unwrap().write(bytes!("Line One\nLine Two\n")).unwrap();
+    process.stdin.take_unwrap().write(b"Line One\nLine Two\n").unwrap();
     let po = process.wait_with_output().unwrap();
     let out =  str::from_utf8(po.output.as_slice()).unwrap();
 
diff --git a/tr/test.rs b/tr/test.rs
index e62e79ed9..b39c29ecb 100644
--- a/tr/test.rs
+++ b/tr/test.rs
@@ -15,31 +15,31 @@ fn run(input: &str, args: &[&'static str]) -> Vec<u8> {
 #[test]
 fn test_toupper() {
     let out = run("!abcd!", ["a-z", "A-Z"]);
-    assert_eq!(out.as_slice(), bytes!("!ABCD!"));
+    assert_eq!(out.as_slice(), b"!ABCD!");
 }
 
 #[test]
 fn test_small_set2() {
     let out = run("@0123456789", ["0-9", "X"]);
-    assert_eq!(out.as_slice(), bytes!("@XXXXXXXXXX"));
+    assert_eq!(out.as_slice(), b"@XXXXXXXXXX");
 }
 
 #[test]
 fn test_unicode() {
     let out = run("(,°□°）, ┬─┬", [", ┬─┬", "╯︵┻━┻"]);
-    assert_eq!(out.as_slice(), bytes!("(╯°□°）╯︵┻━┻"));
+    assert_eq!(out.as_slice(), "(╯°□°）╯︵┻━┻".as_bytes());
 }
 
 #[test]
 fn test_delete() {
     let out = run("aBcD", ["-d", "a-z"]);
-    assert_eq!(out.as_slice(), bytes!("BD"));
+    assert_eq!(out.as_slice(), b"BD");
 }
 
 #[test]
 fn test_delete_complement() {
     let out = run("aBcD", ["-d", "-c", "a-z"]);
-    assert_eq!(out.as_slice(), bytes!("ac"));
+    assert_eq!(out.as_slice(), b"ac");
 }
 
 
diff --git a/truncate/test.rs b/truncate/test.rs
index 8de1adbb7..d549724eb 100644
--- a/truncate/test.rs
+++ b/truncate/test.rs
@@ -28,7 +28,7 @@ fn test_increase_file_size() {
 #[test]
 fn test_decrease_file_size() {
     let mut file = make_file(TFILE2);
-    file.write(bytes!("1234567890")).unwrap();
+    file.write(b"1234567890").unwrap();
     if !Command::new(PROG).args(["--size=-4", TFILE2]).status().unwrap().success() {
         fail!();
     }