diff --git a/tests/playwright/generate-sx-tests.py b/tests/playwright/generate-sx-tests.py
index 0fcae83e..16d18dda 100644
--- a/tests/playwright/generate-sx-tests.py
+++ b/tests/playwright/generate-sx-tests.py
@@ -1125,6 +1125,21 @@ def generate_eval_only_test(test, idx):
                 lname = lm.group(1)
                 lval = js_val_to_sx(lm.group(2).strip().rstrip(','))
                 local_pairs.append((lname, lval))
+            # Also accept ES6 shorthand `{foo}` (= `{foo: foo}`): for every
+            # bare identifier in locals_str not already captured, look up
+            # `const <name> = <value>;` earlier in the test body.
+            taken = {n for n, _ in local_pairs}
+            for sh in re.finditer(r'(?<![\w:])(\w+)(?![\w:])', locals_str):
+                lname = sh.group(1)
+                if lname in taken:
+                    continue
+                const_match = re.search(
+                    r'const\s+' + re.escape(lname) + r'\s*=\s*(.+?);',
+                    body, re.DOTALL)
+                if const_match:
+                    lval = js_val_to_sx(const_match.group(1).strip())
+                    local_pairs.append((lname, lval))
+                    taken.add(lname)
             # SX list of (symbol value) pairs for eval-hs-locals
             locals_sx = '(list ' + ' '.join(f'(list (quote {n}) {v})' for n, v in local_pairs) + ')' if local_pairs else '(list)'