diff --git a/mordant-baseline.toml b/mordant-baseline.toml
index ffb2cdcf58b1..adefb526d4d7 100644
--- a/mordant-baseline.toml
+++ b/mordant-baseline.toml
@@ -27,7 +27,6 @@
 [bun_jsc]
 "bare_bool_args:src/jsc/ZigStackFrame.rs" = 1
 "defaulted_failure:src/jsc/ConsoleObject.rs" = 4
-"reimplemented_helper:src/jsc/webcore_types.rs" = 1
 "same_match_twice:src/jsc/VirtualMachine.rs" = 1
 
 [bun_parsers]
diff --git a/src/jsc/webcore_types.rs b/src/jsc/webcore_types.rs
index b3a6a52daae4..fa74140c563b 100644
--- a/src/jsc/webcore_types.rs
+++ b/src/jsc/webcore_types.rs
@@ -415,20 +415,15 @@ impl Blob {
         }
     }
 
-    /// `Blob.isBunFile()` — backed by a filesystem `Store::File`.
-    #[inline]
-    pub fn is_bun_file(&self) -> bool {
-        matches!(self.store.get().as_deref(), Some(s) if matches!(s.data, store::Data::File(_)))
-    }
-
     /// `Blob.isS3()` — backed by an S3 `Store::S3`.
     #[inline]
     pub fn is_s3(&self) -> bool {
         matches!(self.store.get().as_deref(), Some(s) if matches!(s.data, store::Data::S3(_)))
     }
 
-    /// `Blob.needsToReadFile()` — true when bytes must be fetched off-disk
-    /// before any in-memory consumer can see them (i.e. `Store::File`).
+    /// `Blob.needsToReadFile()` — backed by a filesystem `Store::File` (a
+    /// `Bun.file()`), so the bytes must be fetched off-disk before any
+    /// in-memory consumer can see them.
     #[inline]
     pub fn needs_to_read_file(&self) -> bool {
         matches!(self.store.get().as_deref(), Some(s) if matches!(s.data, store::Data::File(_)))
diff --git a/src/runtime/crypto/CryptoHasher.rs b/src/runtime/crypto/CryptoHasher.rs
index eef63fc555bb..f2e0f2bc02f4 100644
--- a/src/runtime/crypto/CryptoHasher.rs
+++ b/src/runtime/crypto/CryptoHasher.rs
@@ -40,11 +40,11 @@ fn boring_engine(global: &JSGlobalObject) -> *mut boring_ssl::ENGINE {
         .cast::<boring_ssl::ENGINE>()
 }
 
-/// Local helper replacing `input == .blob && input.blob.isBunFile()`.
+/// The synchronous hashers only accept in-memory input, not a `Bun.file()`.
 #[inline]
 fn is_bun_file_blob(input: &BlobOrStringOrBuffer) -> bool {
     match input {
-        BlobOrStringOrBuffer::Blob(b) => b.is_bun_file(),
+        BlobOrStringOrBuffer::Blob(b) => b.needs_to_read_file(),
         _ => false,
     }
 }
diff --git a/src/runtime/webcore/Blob.rs b/src/runtime/webcore/Blob.rs
index 87d303166b86..fec428626363 100644
--- a/src/runtime/webcore/Blob.rs
+++ b/src/runtime/webcore/Blob.rs
@@ -136,13 +136,9 @@ pub use bun_jsc::generated::JSBlob as js;
 
 // ──────────────────────────────────────────────────────────────────────────
 
-// is_s3: defined once above (near is_bun_file); duplicate removed to fix E0034.
-
 // is_all_ascii: canonical impl lives later in this file (pub). Duplicate
 // private helper removed here to fix E0592.
 
-// needs_to_read_file: defined once above; duplicate removed to fix E0034.
-
 // ──────────────────────────────────────────────────────────────────────────
 // BlobExt — `bun_runtime`-tier behaviour layered on the `bun_jsc` data type.
 // Inherent methods (`new`/`init`/`shared_view`/`dupe`/`detach`/`deinit`/…)
@@ -153,9 +149,9 @@ pub use bun_jsc::generated::JSBlob as js;
 #[allow(non_snake_case, clippy::too_many_arguments)]
 pub trait BlobExt {
     fn get_form_data_encoding(&self) -> Option<Box<bun_core::form_data::AsyncFormData>>;
-    // `has_content_type_from_user`/`content_type_or_mime_type`/`is_bun_file`/
-    // `is_s3`/`needs_to_read_file`/`get_file_name`: data-only predicates,
-    // hoisted to inherent `impl Blob` in `bun_jsc::webcore_types` (LAYERING).
+    // `has_content_type_from_user`/`content_type_or_mime_type`/`is_s3`/
+    // `needs_to_read_file`/`get_file_name`: data-only predicates, hoisted to
+    // inherent `impl Blob` in `bun_jsc::webcore_types` (LAYERING).
     fn do_read_from_s3<F: read_file::ReadFileToJs>(
         &self,
         global: &JSGlobalObject,
diff --git a/src/runtime/webcore/Response.rs b/src/runtime/webcore/Response.rs
index c80be4ab57f6..72f171585728 100644
--- a/src/runtime/webcore/Response.rs
+++ b/src/runtime/webcore/Response.rs
@@ -606,7 +606,7 @@ mod _jsc_host_fns {
         match body {
             BodyValue::Used | BodyValue::Empty | BodyValue::Null => JSValue::UNDEFINED,
             BodyValue::Blob(blob) => {
-                if blob.is_bun_file() {
+                if blob.needs_to_read_file() {
                     return JSValue::UNDEFINED;
                 }
                 let result =