diff --git a/tests/by-util/test_shred.rs b/tests/by-util/test_shred.rs
index de54fae5b..b29b9bfec 100644
--- a/tests/by-util/test_shred.rs
+++ b/tests/by-util/test_shred.rs
@@ -36,9 +36,7 @@ fn test_shred_force() {
     at.set_readonly(file);
 
     // Try shred -u.
-    let result = scene.ucmd().arg("-u").arg(file).run();
-    println!("stderr = {:?}", result.stderr);
-    println!("stdout = {:?}", result.stdout);
+    scene.ucmd().arg("-u").arg(file).run();
 
     // file_a was not deleted because it is readonly.
     assert!(at.file_exists(file));
diff --git a/tests/by-util/test_stat.rs b/tests/by-util/test_stat.rs
index 225ea52cd..376b3db51 100644
--- a/tests/by-util/test_stat.rs
+++ b/tests/by-util/test_stat.rs
@@ -194,7 +194,7 @@ fn test_terse_normal_format() {
     // note: contains birth/creation date which increases test fragility
     // * results may vary due to built-in `stat` limitations as well as linux kernel and rust version capability variations
     let args = ["-t", "/"];
-    let actual = new_ucmd!().args(&args).run().stdout;
+    let actual = new_ucmd!().args(&args).succeeds().stdout_move_str();
     let expect = expected_result(&args);
     println!("actual: {:?}", actual);
     println!("expect: {:?}", expect);
@@ -216,7 +216,7 @@ fn test_terse_normal_format() {
 #[cfg(target_os = "linux")]
 fn test_format_created_time() {
     let args = ["-c", "%w", "/boot"];
-    let actual = new_ucmd!().args(&args).run().stdout;
+    let actual = new_ucmd!().args(&args).succeeds().stdout_move_str();
     let expect = expected_result(&args);
     println!("actual: {:?}", actual);
     println!("expect: {:?}", expect);
@@ -240,7 +240,7 @@ fn test_format_created_time() {
 #[cfg(target_os = "linux")]
 fn test_format_created_seconds() {
     let args = ["-c", "%W", "/boot"];
-    let actual = new_ucmd!().args(&args).run().stdout;
+    let actual = new_ucmd!().args(&args).succeeds().stdout_move_str();
     let expect = expected_result(&args);
     println!("actual: {:?}", actual);
     println!("expect: {:?}", expect);
diff --git a/tests/by-util/test_tail.rs b/tests/by-util/test_tail.rs
index 5edff4d55..6e9eb4a17 100644
--- a/tests/by-util/test_tail.rs
+++ b/tests/by-util/test_tail.rs
@@ -226,8 +226,8 @@ fn test_bytes_big() {
         .arg(FILE)
         .arg("-c")
         .arg(format!("{}", N_ARG))
-        .run()
-        .stdout;
+        .succeeds()
+        .stdout_move_str();
     let expected = at.read(EXPECTED_FILE);
 
     assert_eq!(result.len(), expected.len());
@@ -340,6 +340,6 @@ fn test_negative_indexing() {
 
     let negative_bytes_index = new_ucmd!().arg("-c").arg("-20").arg(FOOBAR_TXT).run();
 
-    assert_eq!(positive_lines_index.stdout, negative_lines_index.stdout);
-    assert_eq!(positive_bytes_index.stdout, negative_bytes_index.stdout);
+    assert_eq!(positive_lines_index.stdout(), negative_lines_index.stdout());
+    assert_eq!(positive_bytes_index.stdout(), negative_bytes_index.stdout());
 }