diff --git a/src/bin/main.rs b/src/bin/main.rs
index af2dfdfac5b..05a22324d0f 100644
--- a/src/bin/main.rs
+++ b/src/bin/main.rs
@@ -135,12 +135,6 @@ fn make_opts() -> Options {
         "Rust edition to use",
         "[2015|2018|2021|2024]",
     );
-    opts.optopt(
-        "",
-        "style-edition",
-        "The edition of the Style Guide (unstable).",
-        "[2015|2018|2021|2024]",
-    );
     opts.optopt(
         "",
         "color",
diff --git a/tests/rustfmt/main.rs b/tests/rustfmt/main.rs
index 9a46544b367..ee972d8a6af 100644
--- a/tests/rustfmt/main.rs
+++ b/tests/rustfmt/main.rs
@@ -140,8 +140,6 @@ fn rustfmt_usage_text() {
                             input file path
             --edition [2015|2018|2021|2024]
                             Rust edition to use
-            --style-edition [2015|2018|2021|2024]
-                            The edition of the Style Guide (unstable).
             --color [always|never|auto]
                             Use colored output (if supported)
             --print-config [default|minimal|current] PATH
@@ -190,8 +188,6 @@ fn rustfmt_nightly_usage_text() {
                             input file path
             --edition [2015|2018|2021|2024]
                             Rust edition to use
-            --style-edition [2015|2018|2021|2024]
-                            The edition of the Style Guide (unstable).
             --color [always|never|auto]
                             Use colored output (if supported)
             --print-config [default|minimal|current] PATH