diff --git a/src/uu/sort/src/check.rs b/src/uu/sort/src/check.rs
index f1cd22686..44c71674e 100644
--- a/src/uu/sort/src/check.rs
+++ b/src/uu/sort/src/check.rs
@@ -56,7 +56,7 @@ pub fn check(path: &str, settings: &GlobalSettings) -> i32 {
             ) == Ordering::Greater
             {
                 if !settings.check_silent {
-                    println!("sort: {}:{}: disorder: {}", path, line_idx, new_first.line);
+                    eprintln!("sort: {}:{}: disorder: {}", path, line_idx, new_first.line);
                 }
                 return 1;
             }
@@ -68,7 +68,7 @@ pub fn check(path: &str, settings: &GlobalSettings) -> i32 {
             if compare_by(a, b, settings, chunk.line_data(), chunk.line_data()) == Ordering::Greater
             {
                 if !settings.check_silent {
-                    println!("sort: {}:{}: disorder: {}", path, line_idx, b.line);
+                    eprintln!("sort: {}:{}: disorder: {}", path, line_idx, b.line);
                 }
                 return 1;
             }
diff --git a/tests/by-util/test_sort.rs b/tests/by-util/test_sort.rs
index e594de0a7..1add0bb54 100644
--- a/tests/by-util/test_sort.rs
+++ b/tests/by-util/test_sort.rs
@@ -181,7 +181,7 @@ fn test_check_zero_terminated_failure() {
         .arg("-c")
         .arg("zero-terminated.txt")
         .fails()
-        .stdout_is("sort: zero-terminated.txt:2: disorder: ../../fixtures/du\n");
+        .stderr_only("sort: zero-terminated.txt:2: disorder: ../../fixtures/du\n");
 }
 
 #[test]
@@ -775,13 +775,13 @@ fn test_check() {
             .arg(diagnose_arg)
             .arg("check_fail.txt")
             .fails()
-            .stdout_is("sort: check_fail.txt:6: disorder: 5\n");
+            .stderr_only("sort: check_fail.txt:6: disorder: 5\n");
 
         new_ucmd!()
             .arg(diagnose_arg)
             .arg("multiple_files.expected")
             .succeeds()
-            .stdout_is("");
+            .stderr_is("");
     }
 }