diff --git a/src/uu/rm/src/rm.rs b/src/uu/rm/src/rm.rs
index 259d1ab39..1fdc59371 100644
--- a/src/uu/rm/src/rm.rs
+++ b/src/uu/rm/src/rm.rs
@@ -49,6 +49,7 @@ static OPT_PROMPT_MORE: &str = "prompt-more";
 static OPT_RECURSIVE: &str = "recursive";
 static OPT_RECURSIVE_R: &str = "recursive_R";
 static OPT_VERBOSE: &str = "verbose";
+static PRESUME_INPUT_TTY: &str = "presume-input-tty";
 
 static ARG_FILES: &str = "files";
 
@@ -206,6 +207,17 @@ pub fn uu_app() -> App<'static, 'static> {
             .long(OPT_VERBOSE)
             .help("explain what is being done")
         )
+        // From the GNU source code:
+        // This is solely for testing.
+        // Do not document.
+        // It is relatively difficult to ensure that there is a tty on stdin.
+        // Since rm acts differently depending on that, without this option, 
+        // it'd be harder to test the parts of rm that depend on that setting.
+        .arg(
+            Arg::with_name(PRESUME_INPUT_TTY)
+            .long(PRESUME_INPUT_TTY)
+            .hidden(true)
+        )
         .arg(
             Arg::with_name(ARG_FILES)
             .multiple(true)