diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
index da12a0e..d9ac7d9 100644
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -383,7 +383,7 @@
 class StringTemplateStyle(PercentStyle):
     default_format = '${message}'
     asctime_format = '${asctime}'
-    asctime_search = '${asctime'
+    asctime_search = '${asctime}'
 
     def __init__(self, fmt):
         self._fmt = fmt or self.default_format
diff --git a/Lib/test/test_logging.py b/Lib/test/test_logging.py
index 9492b80..b29d400 100644
--- a/Lib/test/test_logging.py
+++ b/Lib/test/test_logging.py
@@ -1907,6 +1907,8 @@
         self.assertFalse(f.usesTime())
         f = logging.Formatter('%(asctime)s')
         self.assertTrue(f.usesTime())
+        f = logging.Formatter('%(asctime)-15s')
+        self.assertTrue(f.usesTime())
         f = logging.Formatter('asctime')
         self.assertFalse(f.usesTime())
 
@@ -1920,6 +1922,10 @@
         self.assertFalse(f.usesTime())
         f = logging.Formatter('{asctime}', style='{')
         self.assertTrue(f.usesTime())
+        f = logging.Formatter('{asctime!s:15}', style='{')
+        self.assertTrue(f.usesTime())
+        f = logging.Formatter('{asctime:15}', style='{')
+        self.assertTrue(f.usesTime())
         f = logging.Formatter('asctime', style='{')
         self.assertFalse(f.usesTime())
 
@@ -1935,6 +1941,8 @@
         self.assertFalse(f.usesTime())
         f = logging.Formatter('${asctime}', style='$')
         self.assertTrue(f.usesTime())
+        f = logging.Formatter('${asctime', style='$')
+        self.assertFalse(f.usesTime())
         f = logging.Formatter('$asctime', style='$')
         self.assertTrue(f.usesTime())
         f = logging.Formatter('asctime', style='$')
@@ -2097,7 +2105,7 @@
                  LogRecordFactoryTest, ChildLoggerTest, QueueHandlerTest,
                  RotatingFileHandlerTest,
                  LastResortTest,
-                 #TimedRotatingFileHandlerTest
+                 TimedRotatingFileHandlerTest
                 )
 
 if __name__ == "__main__":