diff --git a/crates/oxc_transformer/src/es2022/class_properties/class.rs b/crates/oxc_transformer/src/es2022/class_properties/class.rs
index 3f0a5bb51241e..d6b823aeba739 100644
--- a/crates/oxc_transformer/src/es2022/class_properties/class.rs
+++ b/crates/oxc_transformer/src/es2022/class_properties/class.rs
@@ -76,8 +76,8 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
 
         // Check if class has any properties or statick blocks, and locate constructor (if class has one)
         let mut instance_prop_count = 0;
+        let mut has_instance_private_method = false;
         let mut has_static_prop = false;
-        let mut has_private_method = false;
         let mut has_static_block = false;
         // TODO: Store `FxIndexMap`s in a pool and re-use them
         let mut private_props = FxIndexMap::default();
@@ -118,7 +118,12 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
                             constructor = Some(method);
                         }
                     } else if let PropertyKey::PrivateIdentifier(ident) = &method.key {
-                        has_private_method = true;
+                        if method.r#static {
+                            has_static_prop = true;
+                        } else {
+                            has_instance_private_method = true;
+                        }
+
                         let name = match method.kind {
                             MethodDefinitionKind::Method => ident.name.as_str(),
                             MethodDefinitionKind::Get => &format!("get_{}", ident.name),
@@ -154,7 +159,10 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
         }
 
         // Exit if nothing to transform
-        if instance_prop_count == 0 && !has_static_prop && !has_static_block && !has_private_method
+        if instance_prop_count == 0
+            && !has_static_prop
+            && !has_static_block
+            && !has_instance_private_method
         {
             self.classes_stack.push(ClassDetails {
                 is_declaration,
@@ -193,7 +201,7 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
             None
         };
 
-        let class_brand_binding = has_private_method.then(|| {
+        let class_brand_binding = has_instance_private_method.then(|| {
             // `_Class_brand`
             let name = class_name_binding.as_ref().map_or_else(|| "Class", |binding| &binding.name);
             let name = &format!("_{name}_brand");
@@ -219,7 +227,7 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
         });
 
         // Exit if no instance properties (public or private)
-        if instance_prop_count == 0 && !has_private_method {
+        if instance_prop_count == 0 && !has_instance_private_method {
             return;
         }
 
@@ -271,10 +279,10 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
         // Those assignments will be moved to before class in exit phase of the transform.
         // -> `_foo = foo(); class C {}`
         let mut instance_inits =
-            Vec::with_capacity(instance_prop_count + usize::from(has_private_method));
+            Vec::with_capacity(instance_prop_count + usize::from(has_instance_private_method));
 
         // `_classPrivateMethodInitSpec(this, _C_brand);`
-        if has_private_method {
+        if has_instance_private_method {
             instance_inits.push(self.create_class_private_method_init_spec(ctx));
         }
 
@@ -590,11 +598,10 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
                 let mut weakmap_symbol_id = None;
                 let mut has_method = false;
                 exprs.extend(private_props.values().filter_map(|prop| {
-                    if (prop.is_method && has_method) || prop.is_accessor {
-                        return None;
-                    }
-
-                    if prop.is_method {
+                    if prop.is_method || prop.is_accessor {
+                        if prop.is_static || has_method {
+                            return None;
+                        }
                         has_method = true;
                         // `_C_brand = new WeakSet()`
                         let binding = class_details.bindings.brand();
@@ -642,6 +649,14 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
             // `_Class = class {}`
             let class_expr = ctx.ast.move_expression(expr);
             let assignment = create_assignment(binding, class_expr, ctx);
+
+            if exprs.is_empty() && self.insert_after_exprs.is_empty() {
+                // No need to wrap in sequence if no static property
+                // and static blocks
+                *expr = assignment;
+                return;
+            }
+
             exprs.push(assignment);
             // Add static property assignments + static blocks
             exprs.extend(self.insert_after_exprs.drain(..));
diff --git a/crates/oxc_transformer/src/es2022/class_properties/private_field.rs b/crates/oxc_transformer/src/es2022/class_properties/private_field.rs
index e2e3f22c07912..d96b28f3e9787 100644
--- a/crates/oxc_transformer/src/es2022/class_properties/private_field.rs
+++ b/crates/oxc_transformer/src/es2022/class_properties/private_field.rs
@@ -61,17 +61,6 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
         } = self.classes_stack.find_private_prop(&field_expr.field);
 
         let span = field_expr.span;
-
-        if is_method || is_accessor {
-            let prop_ident = prop_binding.create_read_expression(ctx);
-            return if is_assignment {
-                // TODO: Handle assignment to private method or accessor
-                None
-            } else {
-                Some(self.create_assert_class_brand_for_private_method(prop_ident, span, ctx))
-            };
-        };
-
         let object = ctx.ast.move_expression(&mut field_expr.object);
 
         if self.private_fields_as_properties {
@@ -88,6 +77,11 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
         let prop_ident = prop_binding.create_read_expression(ctx);
 
         let replacement = if is_static {
+            if is_assignment && (is_method || is_accessor) {
+                // TODO: Handle assignment to static private method or static accessor
+                return None;
+            }
+
             // TODO: Ensure there are tests for nested classes with references to private static props
             // of outer class inside inner class, to make sure we're getting the right `class_bindings`.
 
@@ -100,23 +94,37 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
             ) {
                 // `_prop._`
                 ctx.symbols_mut().delete_resolved_reference(class_symbol_id, object_reference_id);
-                Self::create_underscore_member_expression(prop_ident, span, ctx)
+                if is_method || is_accessor {
+                    prop_ident
+                } else {
+                    Self::create_underscore_member_expression(prop_ident, span, ctx)
+                }
             } else {
                 // `_assertClassBrand(Class, object, _prop)._`
                 let class_binding = class_bindings.get_or_init_static_binding(ctx);
                 let class_ident = class_binding.create_read_expression(ctx);
-
-                self.create_assert_class_brand_underscore(
-                    class_ident,
-                    object,
-                    prop_ident,
-                    span,
-                    ctx,
-                )
+                if is_method || is_accessor {
+                    self.create_assert_class_brand(class_ident, object, prop_ident, span, ctx)
+                } else {
+                    self.create_assert_class_brand_underscore(
+                        class_ident,
+                        object,
+                        prop_ident,
+                        span,
+                        ctx,
+                    )
+                }
             }
         } else if is_assignment {
+            if is_method || is_accessor {
+                // TODO: Handle assignment to private method or accessor
+                return None;
+            }
             // `_toSetter(_classPrivateFieldSet2, [_prop, object])._`
             self.create_to_setter(prop_ident, object, span, ctx)
+        } else if is_method || is_accessor {
+            let brand_ident = class_bindings.brand().create_read_expression(ctx);
+            self.create_assert_class_brand(brand_ident, object, prop_ident, span, ctx)
         } else {
             // `_classPrivateFieldGet2(_prop, object)`
             self.create_private_field_get(prop_ident, object, span, ctx)
@@ -278,13 +286,6 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
         let span = field_expr.span;
         let prop_ident = prop_binding.create_read_expression(ctx);
 
-        if is_method || is_accessor {
-            return (
-                self.create_assert_class_brand_for_private_method(prop_ident, span, ctx),
-                ctx.ast.expression_this(SPAN),
-            );
-        };
-
         // `(object.#method)()`
         //  ^^^^^^^^^^^^^^^^ is a parenthesized expression
         let object = ctx.ast.move_expression(field_expr.object.get_inner_expression_mut());
@@ -308,8 +309,13 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
             )
             .is_some()
             {
-                // `_prop._`
-                let callee = Self::create_underscore_member_expression(prop_ident, span, ctx);
+                let callee = if is_method || is_accessor {
+                    // `_prop`
+                    prop_ident
+                } else {
+                    // `_prop._`
+                    Self::create_underscore_member_expression(prop_ident, span, ctx)
+                };
                 (callee, object)
             } else {
                 let class_binding = class_bindings.get_or_init_static_binding(ctx);
@@ -318,14 +324,20 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
                 // Make 2 copies of `object`
                 let (object1, object2) = self.duplicate_object(object, ctx);
 
-                // `_assertClassBrand(Class, object, _prop)._`
-                let assert_obj = self.create_assert_class_brand_underscore(
-                    class_ident,
-                    object1,
-                    prop_ident,
-                    span,
-                    ctx,
-                );
+                let assert_obj = if is_method || is_accessor {
+                    // `_assertClassBrand(Class, object, _prop)._`
+                    self.create_assert_class_brand(class_ident, object1, prop_ident, span, ctx)
+                } else {
+                    // `_assertClassBrand(Class, object, _prop)._`
+                    self.create_assert_class_brand_underscore(
+                        class_ident,
+                        object1,
+                        prop_ident,
+                        span,
+                        ctx,
+                    )
+                };
+
                 (assert_obj, object2)
             }
         } else {
@@ -333,9 +345,15 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
             // Make 2 copies of `object`
             let (object1, object2) = self.duplicate_object(object, ctx);
 
-            // `_classPrivateFieldGet2(_prop, object)`
-            let get_call = self.create_private_field_get(prop_ident, object1, span, ctx);
-            (get_call, object2)
+            let callee = if is_method || is_accessor {
+                // `(_Class_brand, this)`
+                let brand_ident = self.current_class().bindings.brand().create_read_expression(ctx);
+                self.create_assert_class_brand(brand_ident, object1, prop_ident, span, ctx)
+            } else {
+                // `_classPrivateFieldGet2(_prop, object)`
+                self.create_private_field_get(prop_ident, object1, span, ctx)
+            };
+            (callee, object2)
         };
 
         replacement
@@ -1795,19 +1813,6 @@ impl<'a, 'ctx> ClassProperties<'a, 'ctx> {
         )
     }
 
-    /// `_assertClassBrand(_Class_brand, object, _prop)`
-    #[inline]
-    fn create_assert_class_brand_for_private_method(
-        &self,
-        value_or_prop_ident: Expression<'a>,
-        span: Span,
-        ctx: &mut TraverseCtx<'a>,
-    ) -> Expression<'a> {
-        let class_ident = self.current_class().bindings.brand().create_read_expression(ctx);
-        let object = ctx.ast.expression_this(SPAN);
-        self.create_assert_class_brand(class_ident, object, value_or_prop_ident, span, ctx)
-    }
-
     /// `_assertClassBrand(Class, object, _prop)._`
     fn create_assert_class_brand_underscore(
         &self,
diff --git a/tasks/transform_conformance/snapshots/babel.snap.md b/tasks/transform_conformance/snapshots/babel.snap.md
index 7b71201c4d214..36e768c979910 100644
--- a/tasks/transform_conformance/snapshots/babel.snap.md
+++ b/tasks/transform_conformance/snapshots/babel.snap.md
@@ -1,6 +1,6 @@
 commit: 54a8389f
 
-Passed: 632/1095
+Passed: 641/1095
 
 # All Passed:
 * babel-plugin-transform-logical-assignment-operators
@@ -462,7 +462,7 @@ x Output mismatch
 x Output mismatch
 
 
-# babel-plugin-transform-private-methods (17/148)
+# babel-plugin-transform-private-methods (26/148)
 * accessors/arguments/input.js
 x Output mismatch
 
@@ -675,36 +675,9 @@ x Output mismatch
     `----
 
 
-* private-static-method/basic/input.js
-x Output mismatch
-
-* private-static-method/class-check/input.js
-x Output mismatch
-
-* private-static-method/class-expression/input.js
-x Output mismatch
-
-* private-static-method/exfiltrated/input.js
-x Output mismatch
-
-* private-static-method/generator/input.js
-x Output mismatch
-
-* private-static-method/preserve-comments/input.js
-x Output mismatch
-
 * private-static-method/read-only/input.js
 x Output mismatch
 
-* private-static-method/super/input.js
-x Output mismatch
-
-* private-static-method/tagged-template/input.js
-x Output mismatch
-
-* private-static-method/this/input.js
-x Output mismatch
-
 * private-static-method-loose/async/input.js
 
   x TS(1108): A 'return' statement can only be used within a function body.
diff --git a/tasks/transform_conformance/snapshots/babel_exec.snap.md b/tasks/transform_conformance/snapshots/babel_exec.snap.md
index e5737b715b30e..4f5b236567f39 100644
--- a/tasks/transform_conformance/snapshots/babel_exec.snap.md
+++ b/tasks/transform_conformance/snapshots/babel_exec.snap.md
@@ -2,7 +2,7 @@ commit: 54a8389f
 
 node: v22.12.0
 
-Passed: 231 of 362 (63.81%)
+Passed: 251 of 362 (69.34%)
 
 Failures:
 
@@ -54,8 +54,8 @@ TypeError: Cannot read properties of undefined (reading 'bind')
 
 ./fixtures/babel/babel-plugin-transform-class-properties-test-fixtures-private-static-self-method-exec.test.js
 ReferenceError: _bar is not defined
-    at Function.extract (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-properties-test-fixtures-private-static-self-method-exec.test.js:13:46)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-properties-test-fixtures-private-static-self-method-exec.test.js:19:45
+    at Function.extract (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-properties-test-fixtures-private-static-self-method-exec.test.js:9:39)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-properties-test-fixtures-private-static-self-method-exec.test.js:15:45
 
 ./fixtures/babel/babel-plugin-transform-class-properties-test-fixtures-private-static-shadow-exec.test.js
 TypeError: e.has is not a function
@@ -87,9 +87,10 @@ AssertionError: expected '_Class' to be 'Foo' // Object.is equality
 Private field '#bar' must be declared in an enclosing class
 
 ./fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-loose-private-methods-access-exec.test.js
-ReferenceError: _Foo_brand is not defined
-    at getFoo (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-loose-private-methods-access-exec.test.js:17:35)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-loose-private-methods-access-exec.test.js:18:9
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at getFoo (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-loose-private-methods-access-exec.test.js:12:17)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-loose-private-methods-access-exec.test.js:13:9
 
 ./fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-new-target-exec.test.js
 AssertionError: expected [Function Base] to be undefined // Object.is equality
@@ -98,11 +99,6 @@ AssertionError: expected [Function Base] to be undefined // Object.is equality
 ./fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-private-in-exec.test.js
 Private field '#bar' must be declared in an enclosing class
 
-./fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-private-methods-access-exec.test.js
-ReferenceError: _Foo_brand is not defined
-    at getFoo (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-private-methods-access-exec.test.js:17:35)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-class-static-block-test-fixtures-integration-private-methods-access-exec.test.js:18:9
-
 ./fixtures/babel/babel-plugin-transform-optional-chaining-test-fixtures-assumption-noDocumentAll-parenthesized-expression-member-call-exec.test.js
 TypeError: Cannot read properties of undefined (reading 'x')
     at m (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-optional-chaining-test-fixtures-assumption-noDocumentAll-parenthesized-expression-member-call-exec.test.js:10:16)
@@ -140,7 +136,9 @@ AssertionError: expected function to throw an error, but it didn't
 Private field '#foo' must be declared in an enclosing class
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-basic-exec.test.js
-Private field '#privateFieldValue' must be declared in an enclosing class
+ReferenceError: _Cl_brand is not defined
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-basic-exec.test.js:10:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-basic-exec.test.js:30:13
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-class-binding-exec.test.js
 ReferenceError: _A_brand is not defined
@@ -149,23 +147,30 @@ ReferenceError: _A_brand is not defined
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-get-only-setter-exec.test.js
 ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-get-only-setter-exec.test.js:11:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-get-only-setter-exec.test.js:22:13
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-get-only-setter-exec.test.js:10:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-get-only-setter-exec.test.js:21:13
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-helper-exec.test.js
-Private field '#foo' must be declared in an enclosing class
+ReferenceError: _Cl_brand is not defined
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-helper-exec.test.js:9:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-helper-exec.test.js:18:2
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-reassignment-exec.test.js
-Private field '#privateFieldValue' must be declared in an enclosing class
+AssertionError: expected +0 to be 1 // Object.is equality
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-reassignment-exec.test.js:17:18
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-set-only-getter-exec.test.js
-Private field '#privateFieldValue' must be declared in an enclosing class
+ReferenceError: _Cl_brand is not defined
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-set-only-getter-exec.test.js:10:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-set-only-getter-exec.test.js:22:13
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-loose-updates-exec.test.js
 Private field '#privateFieldValue' must be declared in an enclosing class
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-basic-exec.test.js
-Private field '#privateFieldValue' must be declared in an enclosing class
+ReferenceError: _Cl_brand is not defined
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-basic-exec.test.js:10:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-basic-exec.test.js:30:13
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-class-binding-exec.test.js
 ReferenceError: _A_brand is not defined
@@ -174,14 +179,18 @@ ReferenceError: _A_brand is not defined
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js
 ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js:11:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js:22:13
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js:10:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js:21:13
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-helper-exec.test.js
-Private field '#foo' must be declared in an enclosing class
+ReferenceError: _Cl_brand is not defined
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-helper-exec.test.js:9:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-helper-exec.test.js:18:2
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-set-only-getter-exec.test.js
-Private field '#privateFieldValue' must be declared in an enclosing class
+ReferenceError: _Cl_brand is not defined
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-set-only-getter-exec.test.js:10:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-set-only-getter-exec.test.js:22:13
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-accessors-privateFieldsAsProperties-updates-exec.test.js
 Private field '#privateFieldValue' must be declared in an enclosing class
@@ -232,8 +241,8 @@ ReferenceError: _Foo_brand is not defined
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-before-fields-exec.test.js
 ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-before-fields-exec.test.js:11:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-before-fields-exec.test.js:25:9
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-before-fields-exec.test.js:10:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-before-fields-exec.test.js:24:9
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-class-binding-exec.test.js
 ReferenceError: _A_brand is not defined
@@ -241,7 +250,9 @@ ReferenceError: _A_brand is not defined
     at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-class-binding-exec.test.js:21:9
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-context-exec.test.js
-Private field '#getStatus' must be declared in an enclosing class
+ReferenceError: _Foo_brand is not defined
+    at new Foo (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-context-exec.test.js:8:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-context-exec.test.js:34:12
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-exfiltrated-exec.test.js
 ReferenceError: _Foo_brand is not defined
@@ -254,7 +265,8 @@ ReferenceError: _Cl_brand is not defined
     at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-generator-exec.test.js:18:14
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-reassignment-exec.test.js
-Private field '#privateMethod' must be declared in an enclosing class
+AssertionError: expected +0 to be 1 // Object.is equality
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-reassignment-exec.test.js:17:18
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-loose-super-exec.test.js
 ReferenceError: _Sub_brand is not defined
@@ -268,8 +280,8 @@ ReferenceError: _Foo_brand is not defined
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-before-fields-exec.test.js
 ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-before-fields-exec.test.js:12:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-before-fields-exec.test.js:26:9
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-before-fields-exec.test.js:11:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-before-fields-exec.test.js:25:9
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-class-binding-exec.test.js
 ReferenceError: _A_brand is not defined
@@ -277,7 +289,9 @@ ReferenceError: _A_brand is not defined
     at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-class-binding-exec.test.js:21:9
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-context-exec.test.js
-Private field '#getStatus' must be declared in an enclosing class
+ReferenceError: _Foo_brand is not defined
+    at new Foo (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-context-exec.test.js:8:38)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-context-exec.test.js:34:12
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-privateFieldsAsProperties-exfiltrated-exec.test.js
 ReferenceError: _Foo_brand is not defined
@@ -303,166 +317,99 @@ Private field '#method' must be declared in an enclosing class
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-method-reassignment-exec.test.js
 Private field '#privateFieldValue' must be declared in an enclosing class
 
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-basic-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-basic-exec.test.js:21:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-basic-exec.test.js:28:9
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-class-check-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-class-check-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-class-check-exec.test.js:17:13
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-exfiltrated-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-exfiltrated-exec.test.js:9:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-exfiltrated-exec.test.js:19:2
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-generator-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-generator-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-generator-exec.test.js:18:14
-
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-basic-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-basic-exec.test.js:21:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-basic-exec.test.js:28:9
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-basic-exec.test.js:20:25)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-basic-exec.test.js:26:9
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-class-check-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-class-check-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-class-check-exec.test.js:17:13
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Cl.publicMethod (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-class-check-exec.test.js:7:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-class-check-exec.test.js:14:12
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-exfiltrated-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-exfiltrated-exec.test.js:9:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-exfiltrated-exec.test.js:19:2
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-exfiltrated-exec.test.js:9:19)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-exfiltrated-exec.test.js:17:2
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-generator-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-generator-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-generator-exec.test.js:18:14
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-reassignment-exec.test.js
-Private field '#privateStaticMethod' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Cl.test (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-generator-exec.test.js:7:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-generator-exec.test.js:14:23
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-scopable-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-scopable-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-scopable-exec.test.js:22:9
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Cl.publicMethod (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-scopable-exec.test.js:7:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-scopable-exec.test.js:18:18
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-super-exec.test.js
-ReferenceError: _Sub_brand is not defined
-    at Function.check (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-super-exec.test.js:22:29)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-super-exec.test.js:29:13
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Function.check (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-super-exec.test.js:17:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-super-exec.test.js:24:13
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-this-exec.test.js
-ReferenceError: _B_brand is not defined
-    at Function.extract (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-this-exec.test.js:22:30)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-this-exec.test.js:32:25
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Function.extract (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-this-exec.test.js:17:12)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-loose-this-exec.test.js:27:25
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-basic-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-basic-exec.test.js:21:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-basic-exec.test.js:28:9
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-basic-exec.test.js:20:25)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-basic-exec.test.js:26:9
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-class-check-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-class-check-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-class-check-exec.test.js:17:13
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Cl.publicMethod (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-class-check-exec.test.js:7:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-class-check-exec.test.js:14:12
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-exfiltrated-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-exfiltrated-exec.test.js:9:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-exfiltrated-exec.test.js:19:2
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-exfiltrated-exec.test.js:9:19)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-exfiltrated-exec.test.js:17:2
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-generator-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-generator-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-generator-exec.test.js:18:14
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-reassignment-exec.test.js
-Private field '#privateStaticMethod' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Cl.test (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-generator-exec.test.js:7:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-generator-exec.test.js:14:23
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-scopable-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-scopable-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-scopable-exec.test.js:22:9
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Cl.publicMethod (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-scopable-exec.test.js:7:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-scopable-exec.test.js:18:18
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-super-exec.test.js
-ReferenceError: _Sub_brand is not defined
-    at Function.check (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-super-exec.test.js:22:29)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-super-exec.test.js:29:13
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Function.check (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-super-exec.test.js:17:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-super-exec.test.js:24:13
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-this-exec.test.js
-ReferenceError: _B_brand is not defined
-    at Function.extract (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-this-exec.test.js:22:30)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-this-exec.test.js:32:25
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-basic-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-basic-exec.test.js:21:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-basic-exec.test.js:28:9
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-class-check-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-class-check-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-class-check-exec.test.js:17:13
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-exfiltrated-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-exfiltrated-exec.test.js:9:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-exfiltrated-exec.test.js:19:2
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-generator-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-generator-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-generator-exec.test.js:18:14
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Function.extract (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-this-exec.test.js:17:12)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsProperties-this-exec.test.js:27:25
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-reassignment-exec.test.js
 Private field '#privateStaticMethod' must be declared in an enclosing class
 
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-scopable-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-scopable-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-scopable-exec.test.js:22:9
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-super-exec.test.js
-ReferenceError: _Sub_brand is not defined
-    at Function.check (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-super-exec.test.js:22:29)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-super-exec.test.js:29:13
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-this-exec.test.js
-ReferenceError: _B_brand is not defined
-    at Function.extract (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-this-exec.test.js:22:30)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-privateFieldsAsSymbols-this-exec.test.js:32:25
-
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-read-only-exec.test.js
 Private field '#method' must be declared in an enclosing class
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-reassignment-exec.test.js
 Private field '#privateStaticMethod' must be declared in an enclosing class
 
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-scopable-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at new Cl (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-scopable-exec.test.js:8:38)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-scopable-exec.test.js:22:9
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-super-exec.test.js
-ReferenceError: _Sub_brand is not defined
-    at Function.check (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-super-exec.test.js:22:29)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-super-exec.test.js:29:13
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-tagged-template-exec.test.js
-ReferenceError: _Foo_brand is not defined
-    at Function.getReceiver (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-tagged-template-exec.test.js:11:29)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-tagged-template-exec.test.js:17:13
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-this-exec.test.js
-ReferenceError: _B_brand is not defined
-    at Function.extract (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-this-exec.test.js:22:30)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-private-static-method-this-exec.test.js:32:25
-
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-access-in-static-field-initializer-exec.test.js
 Private field '#p' must be declared in an enclosing class
 
@@ -473,46 +420,64 @@ Private field '#privateStaticFieldValue' must be declared in an enclosing class
 Private field '#p' must be declared in an enclosing class
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-get-only-setter-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at Function.getPrivateStaticFieldValue (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-get-only-setter-exec.test.js:11:29)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-get-only-setter-exec.test.js:18:12
+AssertionError: expected [Function _set_privateStaticFieldValue] to be undefined
+    at Proxy.<anonymous> (./node_modules/.pnpm/@vitest+expect@2.1.2/node_modules/@vitest/expect/dist/index.js:1236:20)
+    at Proxy.<anonymous> (./node_modules/.pnpm/@vitest+expect@2.1.2/node_modules/@vitest/expect/dist/index.js:923:17)
+    at Proxy.methodWrapper (./node_modules/.pnpm/chai@5.1.2/node_modules/chai/chai.js:1610:25)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-get-only-setter-exec.test.js:13:42
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-access-in-static-field-initializer-exec.test.js
-Private field '#p' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at new C (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-access-in-static-field-initializer-exec.test.js:12:9)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-access-in-static-field-initializer-exec.test.js:18:11
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-access-in-static-field-initializer-exec.test.js:24:4
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-basic-exec.test.js
-Private field '#privateStaticFieldValue' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Function.getValue (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-basic-exec.test.js:10:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-basic-exec.test.js:27:12
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-destructure-set-exec.test.js
-Private field '#p' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at new C (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-destructure-set-exec.test.js:10:5)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-destructure-set-exec.test.js:22:2
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-get-only-setter-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at Function.getPrivateStaticFieldValue (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-get-only-setter-exec.test.js:15:29)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-get-only-setter-exec.test.js:26:12
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-set-only-getter-exec.test.js
-Private field '#privateFieldValue' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Function.getPrivateStaticFieldValue (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-get-only-setter-exec.test.js:10:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-get-only-setter-exec.test.js:21:12
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-loose-updates-exec.test.js
 Private field '#privateFieldValue' must be declared in an enclosing class
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-access-in-static-field-initializer-exec.test.js
-Private field '#p' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at new C (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-access-in-static-field-initializer-exec.test.js:12:9)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-access-in-static-field-initializer-exec.test.js:18:11
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-access-in-static-field-initializer-exec.test.js:24:4
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-basic-exec.test.js
-Private field '#privateStaticFieldValue' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Function.getValue (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-basic-exec.test.js:10:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-basic-exec.test.js:27:12
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-destructure-set-exec.test.js
-Private field '#p' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at new C (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-destructure-set-exec.test.js:10:5)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-destructure-set-exec.test.js:22:2
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at Function.getPrivateStaticFieldValue (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js:15:29)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js:26:12
-
-./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-set-only-getter-exec.test.js
-Private field '#privateFieldValue' must be declared in an enclosing class
+TypeError: attempted to use private field on non-instance
+    at _classPrivateFieldBase (./node_modules/.pnpm/@babel+runtime@7.26.0/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js:2:44)
+    at Function.getPrivateStaticFieldValue (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js:10:11)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-get-only-setter-exec.test.js:21:12
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsProperties-updates-exec.test.js
 Private field '#privateFieldValue' must be declared in an enclosing class
@@ -527,9 +492,11 @@ Private field '#privateStaticFieldValue' must be declared in an enclosing class
 Private field '#p' must be declared in an enclosing class
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsSymbols-get-only-setter-exec.test.js
-ReferenceError: _Cl_brand is not defined
-    at Function.getPrivateStaticFieldValue (./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsSymbols-get-only-setter-exec.test.js:11:29)
-    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsSymbols-get-only-setter-exec.test.js:18:12
+AssertionError: expected [Function _set_privateStaticFieldValue] to be undefined
+    at Proxy.<anonymous> (./node_modules/.pnpm/@vitest+expect@2.1.2/node_modules/@vitest/expect/dist/index.js:1236:20)
+    at Proxy.<anonymous> (./node_modules/.pnpm/@vitest+expect@2.1.2/node_modules/@vitest/expect/dist/index.js:923:17)
+    at Proxy.methodWrapper (./node_modules/.pnpm/chai@5.1.2/node_modules/chai/chai.js:1610:25)
+    at ./tasks/transform_conformance/fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsSymbols-get-only-setter-exec.test.js:13:42
 
 ./fixtures/babel/babel-plugin-transform-private-methods-test-fixtures-static-accessors-privateFieldsAsSymbols-set-only-getter-exec.test.js
 Private field '#privateFieldValue' must be declared in an enclosing class