diff --git a/test/regresstest/run_regress_test.py b/test/regresstest/run_regress_test.py
index 9e9fd7972f75de2b43f533d56f99554b7096bca0..b3d45d821c3769b186e14faba2178a5a3b71e14b 100755
--- a/test/regresstest/run_regress_test.py
+++ b/test/regresstest/run_regress_test.py
@@ -390,18 +390,23 @@ def get_file_source(file):
 
 def setIntlEnviron(case):
     # intl environ LC_ALL
+    if 'LC_ALL' in os.environ:
+        del os.environ['LC_ALL']
+    if 'TZ' in os.environ:
+        del os.environ['TZ']
     real_path = case.replace('/regresstest/ark-regress/', '') if case.startswith('/') else case.replace('regresstest/ark-regress/', '')
     js_case_path = os.path.join(RegressTestConfig.REGRESS_TEST_CASE_DIR, real_path)
     if not os.path.exists(js_case_path):
         return;
     source = get_file_source(js_case_path)
     env_match = ENV_PATTERN.search(source)
-    if 'LC_ALL' in os.environ:
-        del os.environ['LC_ALL']
     if env_match:
         for env_pair in env_match.group(1).strip().split():
             var, value = env_pair.split('=')
-            os.environ['LC_ALL'] = value
+            if var.find('TZ') >= 0:
+                os.environ['TZ'] = value
+            if var.find('LC_ALL') >= 0:
+                os.environ['LC_ALL'] = value
             break;
 
 def run_test_case_dir(args, test_abc_files, force_gc_files, timeout=RegressTestConfig.DEFAULT_TIMEOUT):