diff --git a/src/uu/cp/src/cp.rs b/src/uu/cp/src/cp.rs
index dc7571b2e..95ca7eea2 100644
--- a/src/uu/cp/src/cp.rs
+++ b/src/uu/cp/src/cp.rs
@@ -426,6 +426,10 @@ pub fn uu_app<'a>() -> Command<'a> {
                 .takes_value(true)
                 .value_name("WHEN")
                 .overrides_with_all(MODE_ARGS)
+                .require_equals(true)
+                .default_missing_value("always")
+                .value_parser(["auto", "always", "never"])
+                .min_values(0)
                 .help("control clone/CoW copies. See below"),
         )
         .arg(
diff --git a/tests/by-util/test_cp.rs b/tests/by-util/test_cp.rs
index d6b00c344..45b331576 100644
--- a/tests/by-util/test_cp.rs
+++ b/tests/by-util/test_cp.rs
@@ -1334,6 +1334,24 @@ fn test_cp_reflink_auto() {
     assert_eq!(at.read(TEST_EXISTING_FILE), "Hello, World!\n");
 }
 
+#[test]
+#[cfg(any(target_os = "linux", target_os = "android", target_os = "macos"))]
+fn test_cp_reflink_none() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let result = ucmd
+        .arg("--reflink")
+        .arg(TEST_HELLO_WORLD_SOURCE)
+        .arg(TEST_EXISTING_FILE)
+        .run();
+
+    if result.succeeded() {
+        // Check the content of the destination file
+        assert_eq!(at.read(TEST_EXISTING_FILE), "Hello, World!\n");
+    } else {
+        // Older Linux versions do not support cloning.
+    }
+}
+
 #[test]
 #[cfg(any(target_os = "linux", target_os = "android", target_os = "macos"))]
 fn test_cp_reflink_never() {
@@ -1356,7 +1374,7 @@ fn test_cp_reflink_bad() {
         .arg(TEST_HELLO_WORLD_SOURCE)
         .arg(TEST_EXISTING_FILE)
         .fails()
-        .stderr_contains("invalid argument");
+        .stderr_contains("error: \"bad\" isn't a valid value for '--reflink[=<WHEN>...]'");
 }
 
 #[test]