diff --git a/src/items.rs b/src/items.rs
index fc043a697e0..cf4c40c3c7a 100644
--- a/src/items.rs
+++ b/src/items.rs
@@ -2570,7 +2570,7 @@ fn rewrite_fn_base(
             .last()
             .map_or(false, |last_line| last_line.contains("//"));
 
-        if context.config.style_edition() >= StyleEdition::Edition2024 {
+        if context.config.style_edition() >= StyleEdition::Edition2027 {
             if closing_paren_overflow_max_width {
                 result.push(')');
                 result.push_str(&indent.to_string_with_newline(context.config));
diff --git a/tests/source/issue-3278/version_one.rs b/tests/source/issue-3278/style_edition_2015.rs
similarity index 100%
rename from tests/source/issue-3278/version_one.rs
rename to tests/source/issue-3278/style_edition_2015.rs
diff --git a/tests/source/issue-3278/version_two.rs b/tests/source/issue-3278/style_edition_2024.rs
similarity index 100%
rename from tests/source/issue-3278/version_two.rs
rename to tests/source/issue-3278/style_edition_2024.rs
diff --git a/tests/target/issue-3278/version_two.rs b/tests/source/issue-3278/style_edition_2027.rs
similarity index 82%
rename from tests/target/issue-3278/version_two.rs
rename to tests/source/issue-3278/style_edition_2027.rs
index eb605e509f9..f33dffeb7f5 100644
--- a/tests/target/issue-3278/version_two.rs
+++ b/tests/source/issue-3278/style_edition_2027.rs
@@ -1,4 +1,4 @@
-// rustfmt-style_edition: 2024
+// rustfmt-style_edition: 2027
 
 pub fn parse_conditional<'a, I: 'a>()
 -> impl Parser<Input = I, Output = Expr, PartialState = ()> + 'a
diff --git a/tests/source/long-fn-1/version_one.rs b/tests/source/long-fn-1/style_edition_2015.rs
similarity index 100%
rename from tests/source/long-fn-1/version_one.rs
rename to tests/source/long-fn-1/style_edition_2015.rs
diff --git a/tests/source/long-fn-1/version_two.rs b/tests/source/long-fn-1/style_edition_2024.rs
similarity index 100%
rename from tests/source/long-fn-1/version_two.rs
rename to tests/source/long-fn-1/style_edition_2024.rs
diff --git a/tests/source/long-fn-1/style_edition_2027.rs b/tests/source/long-fn-1/style_edition_2027.rs
new file mode 100644
index 00000000000..ded5a38d179
--- /dev/null
+++ b/tests/source/long-fn-1/style_edition_2027.rs
@@ -0,0 +1,21 @@
+// rustfmt-style_edition: 2027
+// Tests that a function which is almost short enough, but not quite, gets
+// formatted correctly.
+
+impl Foo {
+    fn some_input(&mut self, input: Input, input_path: Option<PathBuf>, ) -> (Input, Option<PathBuf>) {}
+
+    fn some_inpu(&mut self, input: Input, input_path: Option<PathBuf>) -> (Input, Option<PathBuf>) {}
+}
+
+// #1843
+#[allow(non_snake_case)]
+pub extern "C" fn Java_com_exonum_binding_storage_indices_ValueSetIndexProxy_nativeContainsByHash() -> bool {
+    false
+}
+
+// #3009
+impl Something {
+    fn my_function_name_is_way_to_long_but_used_as_a_case_study_or_an_example_its_fine(
+) -> Result<  (), String  > {}
+}
diff --git a/tests/target/issue-3278/version_one.rs b/tests/target/issue-3278/style_edition_2015.rs
similarity index 100%
rename from tests/target/issue-3278/version_one.rs
rename to tests/target/issue-3278/style_edition_2015.rs
diff --git a/tests/target/issue-3278/style_edition_2024.rs b/tests/target/issue-3278/style_edition_2024.rs
new file mode 100644
index 00000000000..676db3b20f8
--- /dev/null
+++ b/tests/target/issue-3278/style_edition_2024.rs
@@ -0,0 +1,8 @@
+// rustfmt-style_edition: 2024
+
+pub fn parse_conditional<'a, I: 'a>(
+) -> impl Parser<Input = I, Output = Expr, PartialState = ()> + 'a
+where
+    I: Stream<Item = char>,
+{
+}
diff --git a/tests/target/issue-3278/style_edition_2027.rs b/tests/target/issue-3278/style_edition_2027.rs
new file mode 100644
index 00000000000..f33dffeb7f5
--- /dev/null
+++ b/tests/target/issue-3278/style_edition_2027.rs
@@ -0,0 +1,8 @@
+// rustfmt-style_edition: 2027
+
+pub fn parse_conditional<'a, I: 'a>()
+-> impl Parser<Input = I, Output = Expr, PartialState = ()> + 'a
+where
+    I: Stream<Item = char>,
+{
+}
diff --git a/tests/target/long-fn-1/version_one.rs b/tests/target/long-fn-1/style_edition_2015.rs
similarity index 100%
rename from tests/target/long-fn-1/version_one.rs
rename to tests/target/long-fn-1/style_edition_2015.rs
diff --git a/tests/target/long-fn-1/style_edition_2024.rs b/tests/target/long-fn-1/style_edition_2024.rs
new file mode 100644
index 00000000000..f5edca5ee7d
--- /dev/null
+++ b/tests/target/long-fn-1/style_edition_2024.rs
@@ -0,0 +1,29 @@
+// rustfmt-style_edition: 2024
+// Tests that a function which is almost short enough, but not quite, gets
+// formatted correctly.
+
+impl Foo {
+    fn some_input(
+        &mut self,
+        input: Input,
+        input_path: Option<PathBuf>,
+    ) -> (Input, Option<PathBuf>) {
+    }
+
+    fn some_inpu(&mut self, input: Input, input_path: Option<PathBuf>) -> (Input, Option<PathBuf>) {
+    }
+}
+
+// #1843
+#[allow(non_snake_case)]
+pub extern "C" fn Java_com_exonum_binding_storage_indices_ValueSetIndexProxy_nativeContainsByHash(
+) -> bool {
+    false
+}
+
+// #3009
+impl Something {
+    fn my_function_name_is_way_to_long_but_used_as_a_case_study_or_an_example_its_fine(
+    ) -> Result<(), String> {
+    }
+}
diff --git a/tests/target/long-fn-1/version_two.rs b/tests/target/long-fn-1/style_edition_2027.rs
similarity index 95%
rename from tests/target/long-fn-1/version_two.rs
rename to tests/target/long-fn-1/style_edition_2027.rs
index f6007398bcc..87361f0b96b 100644
--- a/tests/target/long-fn-1/version_two.rs
+++ b/tests/target/long-fn-1/style_edition_2027.rs
@@ -1,4 +1,4 @@
-// rustfmt-style_edition: 2024
+// rustfmt-style_edition: 2027
 // Tests that a function which is almost short enough, but not quite, gets
 // formatted correctly.