diff --git a/Lib/json/tests/test_tool.py b/Lib/json/tests/test_tool.py
index 679ae83..b5d4fca 100644
--- a/Lib/json/tests/test_tool.py
+++ b/Lib/json/tests/test_tool.py
@@ -19,19 +19,19 @@
     [
         [
             "blorpie"
-        ], 
+        ],
         [
             "whoops"
-        ], 
-        [], 
-        "d-shtaeou", 
-        "d-nthiouh", 
-        "i-vhbjkhnth", 
+        ],
+        [],
+        "d-shtaeou",
+        "d-nthiouh",
+        "i-vhbjkhnth",
         {
             "nifty": 87
-        }, 
+        },
         {
-            "field": "yes", 
+            "field": "yes",
             "morefield": false
         }
     ]
diff --git a/Lib/json/tool.py b/Lib/json/tool.py
index 9ec3440..fe47c52 100644
--- a/Lib/json/tool.py
+++ b/Lib/json/tool.py
@@ -31,7 +31,8 @@
         except ValueError, e:
             raise SystemExit(e)
     with outfile:
-        json.dump(obj, outfile, sort_keys=True, indent=4)
+        json.dump(obj, outfile, sort_keys=True,
+                  indent=4, separators=(',', ': '))
         outfile.write('\n')