diff --git a/tests/test_json_compat.py b/tests/test_json_compat.py
index c1d02342..4252ee33 100644
--- a/tests/test_json_compat.py
+++ b/tests/test_json_compat.py
@@ -72,21 +72,21 @@ def test_dumps_compatability():
     UTF_SURROGATE1024 = '\udfff'
     param_basis = {
         'indent': [
-            # -1,
-            # -2,
-            # '    ',
-            # ' ab ',
-            # 4, 0,
-            # None,
-            # '\t',
-            # NULL_CHAR,
+            -1,
+            -2,
+            '    ',
+            ' ab ',
+            4, 0,
+            None,
+            '\t',
+            NULL_CHAR,
             UTF_SURROGATE0000,
-            # UTF_SURROGATE1024,
+            UTF_SURROGATE1024,
         ],
-        'ensure_ascii': [False],
-        # 'ensure_ascii': [True, False, None],
-        # 'sort_keys': [True, False, None],
-        # 'default': [None, str],
+        # 'ensure_ascii': [False],
+        'ensure_ascii': [True, False, None],
+        'sort_keys': [True, False, None],
+        'default': [None, str],
         'module': list(JSON_IMPLS.keys()),
     }
     kwargs_keys = ['indent', 'default', 'ensure_ascii', 'sort_keys']