diff --git a/tests/tests-u-runner/runner/plugins/parser/runner_js_parser.py b/tests/tests-u-runner/runner/plugins/parser/runner_js_parser.py
index e43f521c7c0f101dc3d8fc61d5f9cb5a174814d9..a8a0adc31fdbf0490d0ef31bfd857769f59a749f 100644
--- a/tests/tests-u-runner/runner/plugins/parser/runner_js_parser.py
+++ b/tests/tests-u-runner/runner/plugins/parser/runner_js_parser.py
@@ -26,13 +26,12 @@ class RunnerJSParser(RunnerJS):
         self.add_directory("parser/as", "ts", flags=["--parse-only", "--extension=as"])
         self.add_directory("parser/ets", "ets", flags=[
             "--extension=ets",
-            "--output=/dev/null",
+            "--opt-level=2",
             f"--stdlib={self.ets_stdlib_root}",
             f"--arktsconfig={self.arktsconfig}"
         ])
         self.add_directory("compiler/ets", "ets", flags=[
             "--extension=ets",
-            "--output=/dev/null",
             f"--stdlib={self.ets_stdlib_root}",
             f"--arktsconfig={self.arktsconfig}"
         ])
diff --git a/tests/tests-u-runner/runner/plugins/parser/test_js_parser.py b/tests/tests-u-runner/runner/plugins/parser/test_js_parser.py
index d5f2e32d96639920614a4c1068e22f1af69c9a49..048668b42001104a9ba557a878c65396396c65b1 100644
--- a/tests/tests-u-runner/runner/plugins/parser/test_js_parser.py
+++ b/tests/tests-u-runner/runner/plugins/parser/test_js_parser.py
@@ -1,5 +1,6 @@
 import logging
-from os import path
+from os import path, makedirs
+import tempfile
 
 from runner.descriptor import Descriptor
 from runner.utils import write_2_file
@@ -12,6 +13,8 @@ class TestJSParser(TestFileBased):
     def __init__(self, test_env, test_path, flags, test_id):
         TestFileBased.__init__(self, test_env, test_path, flags, test_id)
         self.expected_path = f"{path.splitext(self.path)[0]}-expected.txt"
+        self.bytecode_path = path.join("/tmp", "es2panda")
+        makedirs(self.bytecode_path, exist_ok=True)
 
     def do_run(self):
         desc = Descriptor(self.path).get_descriptor()
@@ -21,11 +24,16 @@ class TestJSParser(TestFileBased):
         if 'flags' in desc and 'module' in desc['flags']:
             es2panda_flags.append("--module")
 
-        self.passed, self.report, self.fail_kind = self.run_es2panda(
-            flags=es2panda_flags,
-            test_abc="",
-            result_validator=self.es2panda_result_validator
-        )
+        test_basename = path.basename(self.path)
+        with tempfile.NamedTemporaryFile(mode='w+b',
+                                         dir=self.bytecode_path,
+                                         prefix=f"{path.splitext(test_basename)[0]}_",
+                                         suffix=".abc") as temp_abc:
+            self.passed, self.report, self.fail_kind = self.run_es2panda(
+                flags=es2panda_flags,
+                test_abc=temp_abc.name,
+                result_validator=self.es2panda_result_validator
+            )
 
         if self.update_expected and self.report:
             self.update_expected_files(self.report.output)