diff --git a/crates/oxc_ast/src/ast/js.rs b/crates/oxc_ast/src/ast/js.rs
index 407cae74feb62..7f824995dbd30 100644
--- a/crates/oxc_ast/src/ast/js.rs
+++ b/crates/oxc_ast/src/ast/js.rs
@@ -353,7 +353,7 @@ impl<'a> Expression<'a> {
         matches!(self, Expression::Identifier(_))
     }
 
-    pub fn get_identifier_reference(&self) -> Option<&IdentifierReference> {
+    pub fn get_identifier_reference(&self) -> Option<&IdentifierReference<'a>> {
         match self.get_inner_expression() {
             Expression::Identifier(ident) => Some(ident),
             _ => None,
diff --git a/crates/oxc_transformer/src/lib.rs b/crates/oxc_transformer/src/lib.rs
index 0a05975a2f7fe..2766fbab42326 100644
--- a/crates/oxc_transformer/src/lib.rs
+++ b/crates/oxc_transformer/src/lib.rs
@@ -157,6 +157,14 @@ impl<'a> Traverse<'a> for Transformer<'a> {
         self.x3_es2015.transform_expression_on_exit(expr);
     }
 
+    fn enter_simple_assignment_target(
+        &mut self,
+        node: &mut SimpleAssignmentTarget<'a>,
+        _ctx: &mut TraverseCtx<'a>,
+    ) {
+        self.x0_typescript.transform_simple_assignment_target(node);
+    }
+
     fn enter_formal_parameter(
         &mut self,
         param: &mut FormalParameter<'a>,
diff --git a/crates/oxc_transformer/src/typescript/annotations.rs b/crates/oxc_transformer/src/typescript/annotations.rs
index 90d0e1163b2da..3b9057ee95cb0 100644
--- a/crates/oxc_transformer/src/typescript/annotations.rs
+++ b/crates/oxc_transformer/src/typescript/annotations.rs
@@ -122,6 +122,9 @@ impl<'a> TypeScriptAnnotations<'a> {
                 ModuleDeclaration::ExportAllDeclaration(decl) => {
                     return !decl.export_kind.is_type()
                 }
+                ModuleDeclaration::ExportDefaultDeclaration(decl) => {
+                    return !decl.is_typescript_syntax()
+                }
                 ModuleDeclaration::ImportDeclaration(decl) => {
                     let is_type = decl.import_kind.is_type();
 
@@ -228,7 +231,7 @@ impl<'a> TypeScriptAnnotations<'a> {
         body.body.retain(|elem| match elem {
             ClassElement::MethodDefinition(method) => {
                 matches!(method.r#type, MethodDefinitionType::MethodDefinition)
-                    || !method.value.is_typescript_syntax()
+                    && !method.value.is_typescript_syntax()
             }
             ClassElement::PropertyDefinition(prop) => {
                 if prop.value.as_ref().is_some_and(Expression::is_typescript_syntax)
@@ -239,13 +242,27 @@ impl<'a> TypeScriptAnnotations<'a> {
                     matches!(prop.r#type, PropertyDefinitionType::PropertyDefinition)
                 }
             }
+            ClassElement::AccessorProperty(prop) => {
+                matches!(prop.r#type, AccessorPropertyType::AccessorProperty)
+            }
             ClassElement::TSIndexSignature(_) => false,
-            _ => true,
+            ClassElement::StaticBlock(_) => true,
         });
     }
 
     pub fn transform_expression(&mut self, expr: &mut Expression<'a>) {
-        *expr = self.ctx.ast.copy(expr.get_inner_expression());
+        if expr.is_typescript_syntax() {
+            *expr = self.ctx.ast.copy(expr.get_inner_expression());
+        }
+    }
+
+    pub fn transform_simple_assignment_target(&mut self, target: &mut SimpleAssignmentTarget<'a>) {
+        if let Some(expr) = target.get_expression() {
+            if let Some(ident) = expr.get_inner_expression().get_identifier_reference() {
+                let ident = self.ctx.ast.alloc(self.ctx.ast.copy(ident));
+                *target = SimpleAssignmentTarget::AssignmentTargetIdentifier(ident);
+            }
+        }
     }
 
     pub fn transform_formal_parameter(&mut self, param: &mut FormalParameter<'a>) {
diff --git a/crates/oxc_transformer/src/typescript/mod.rs b/crates/oxc_transformer/src/typescript/mod.rs
index b0065e02155f8..7bc67783bc78b 100644
--- a/crates/oxc_transformer/src/typescript/mod.rs
+++ b/crates/oxc_transformer/src/typescript/mod.rs
@@ -109,6 +109,10 @@ impl<'a> TypeScript<'a> {
         self.annotations.transform_expression(expr);
     }
 
+    pub fn transform_simple_assignment_target(&mut self, target: &mut SimpleAssignmentTarget<'a>) {
+        self.annotations.transform_simple_assignment_target(target);
+    }
+
     pub fn transform_formal_parameter(&mut self, param: &mut FormalParameter<'a>) {
         self.annotations.transform_formal_parameter(param);
     }
diff --git a/tasks/transform_conformance/babel.snap.md b/tasks/transform_conformance/babel.snap.md
index 0438710ff93f1..41d11fabac1d1 100644
--- a/tasks/transform_conformance/babel.snap.md
+++ b/tasks/transform_conformance/babel.snap.md
@@ -1,6 +1,6 @@
 commit: 4bd1b2c2
 
-Passed: 469/926
+Passed: 477/926
 
 # All Passed:
 * babel-preset-react
@@ -445,20 +445,12 @@ Passed: 469/926
 * opts/optimizeConstEnums/input.ts
 * opts/rewriteImportExtensions/input.ts
 
-# babel-plugin-transform-typescript (125/150)
-* cast/multiple-assert-and-assign/input.ts
-* class/accessor-allowDeclareFields-false/input.ts
-* class/accessor-allowDeclareFields-true/input.ts
-* class/methods/input.ts
-* class/private-method-override/input.ts
+# babel-plugin-transform-typescript (133/150)
 * enum/mix-references/input.ts
 * enum/ts5.0-const-foldable/input.ts
 * exports/declared-types/input.ts
-* exports/default-function/input.ts
 * exports/interface/input.ts
 * imports/type-only-export-specifier-2/input.ts
-* lvalues/as-expression/input.ts
-* lvalues/type-assertion/input.ts
 * optimize-const-enums/custom-values/input.ts
 * optimize-const-enums/custom-values-exported/input.ts
 * optimize-const-enums/declare/input.ts