diff --git a/clippy_lints/src/bytecount.rs b/clippy_lints/src/bytecount.rs
index b8828719f627c..eb5dc7ceecdc7 100644
--- a/clippy_lints/src/bytecount.rs
+++ b/clippy_lints/src/bytecount.rs
@@ -28,7 +28,7 @@ declare_clippy_lint! {
     /// &vec.iter().filter(|x| **x == 0u8).count(); // use bytecount::count instead
     /// ```
     pub NAIVE_BYTECOUNT,
-    perf,
+    pedantic,
     "use of naive `<slice>.filter(|&x| x == y).count()` to count byte values"
 }
 
diff --git a/clippy_lints/src/lib.rs b/clippy_lints/src/lib.rs
index 183778cb55eba..8259fd3c320be 100644
--- a/clippy_lints/src/lib.rs
+++ b/clippy_lints/src/lib.rs
@@ -1343,6 +1343,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&await_holding_invalid::AWAIT_HOLDING_LOCK),
         LintId::of(&await_holding_invalid::AWAIT_HOLDING_REFCELL_REF),
         LintId::of(&bit_mask::VERBOSE_BIT_MASK),
+        LintId::of(&bytecount::NAIVE_BYTECOUNT),
         LintId::of(&case_sensitive_file_extension_comparisons::CASE_SENSITIVE_FILE_EXTENSION_COMPARISONS),
         LintId::of(&checked_conversions::CHECKED_CONVERSIONS),
         LintId::of(&copies::SAME_FUNCTIONS_IN_IF_CONDITION),
@@ -1458,7 +1459,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&blocks_in_if_conditions::BLOCKS_IN_IF_CONDITIONS),
         LintId::of(&booleans::LOGIC_BUG),
         LintId::of(&booleans::NONMINIMAL_BOOL),
-        LintId::of(&bytecount::NAIVE_BYTECOUNT),
         LintId::of(&collapsible_if::COLLAPSIBLE_ELSE_IF),
         LintId::of(&collapsible_if::COLLAPSIBLE_IF),
         LintId::of(&collapsible_match::COLLAPSIBLE_MATCH),
@@ -2015,7 +2015,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     ]);
 
     store.register_group(true, "clippy::perf", Some("clippy_perf"), vec![
-        LintId::of(&bytecount::NAIVE_BYTECOUNT),
         LintId::of(&entry::MAP_ENTRY),
         LintId::of(&escape::BOXED_LOCAL),
         LintId::of(&large_const_arrays::LARGE_CONST_ARRAYS),