diff -r e7d922d8ee03 Lib/logging/__init__.py
--- a/Lib/logging/__init__.py	Sat Jan 11 13:15:39 2014 +0200
+++ b/Lib/logging/__init__.py	Mon Jan 13 10:42:27 2014 -0800
@@ -366,7 +366,7 @@
         return self._fmt % record.__dict__
 
 class StrFormatStyle(PercentStyle):
-    default_format = '{message}'
+    default_format = '{levelname}:{name}:{message}'
     asctime_format = '{asctime}'
     asctime_search = '{asctime'
 
@@ -375,7 +375,7 @@
 
 
 class StringTemplateStyle(PercentStyle):
-    default_format = '${message}'
+    default_format = '${levelname}:${name}:${message}'
     asctime_format = '${asctime}'
     asctime_search = '${asctime}'
 
@@ -1718,9 +1718,11 @@
                     stream = kwargs.get("stream")
                     h = StreamHandler(stream)
                 handlers = [h]
-            fs = kwargs.get("format", BASIC_FORMAT)
+            fs = kwargs.get("format", None)
             dfs = kwargs.get("datefmt", None)
             style = kwargs.get("style", '%')
+            if fs is None and style == "%":
+                fs = BASIC_FORMAT
             fmt = Formatter(fs, dfs, style)
             for h in handlers:
                 if h.formatter is None:
diff -r e7d922d8ee03 Lib/test/test_logging.py
--- a/Lib/test/test_logging.py	Sat Jan 11 13:15:39 2014 +0200
+++ b/Lib/test/test_logging.py	Mon Jan 13 10:42:27 2014 -0800
@@ -3517,6 +3517,22 @@
         # level is not explicitly set
         self.assertEqual(logging.root.level, self.original_logging_level)
 
+    def test_strformatstyle(self):
+        with captured_stdout() as output:
+            logging.basicConfig(stream=sys.stdout, style="{")
+            logging.error("Log an error")
+            sys.stdout.seek(0)
+            self.assertEqual(output.getvalue(),
+                "ERROR:root:Log an error\n")
+
+    def test_stringtemplatestyle(self):
+        with captured_stdout() as output:
+            logging.basicConfig(stream=sys.stdout, style="$")
+            logging.error("Log an error")
+            sys.stdout.seek(0)
+            self.assertEqual(output.getvalue(),
+                "ERROR:root:Log an error\n")
+
     def test_filename(self):
 
         def cleanup(h1, h2, fn):