diff --git a/pandas/tests/test_graphics.py b/pandas/tests/test_graphics.py
index 12588afd39c0c..637f532c23122 100644
--- a/pandas/tests/test_graphics.py
+++ b/pandas/tests/test_graphics.py
@@ -1364,10 +1364,8 @@ def test_boxplot(self):
 
         # Multiple columns with an ax argument is not supported
         fig, ax = self.plt.subplots()
-        self.assertRaisesRegexp(
-            ValueError, 'existing axis', df.boxplot,
-            column=['Col1', 'Col2'], by='X', ax=ax
-            )
+        with tm.assertRaisesRegexp(ValueError, 'existing axis'):
+            df.boxplot(column=['Col1', 'Col2'], by='X', ax=ax)
 
         # When by is None, check that all relevant lines are present in the dict
         fig, ax = self.plt.subplots()
diff --git a/pandas/tseries/plotting.py b/pandas/tseries/plotting.py
index abec1d469114f..9eecfc21be189 100644
--- a/pandas/tseries/plotting.py
+++ b/pandas/tseries/plotting.py
@@ -75,7 +75,6 @@ def tsplot(series, plotf, **kwargs):
         args.append(style)
 
     lines = plotf(ax, *args, **kwargs)
-    label = kwargs.get('label', None)
 
     # set date formatter, locators and rescale limits
     format_dateaxis(ax, ax.freq)
@@ -83,7 +82,10 @@ def tsplot(series, plotf, **kwargs):
     ax.set_xlim(left, right)
 
     # x and y coord info
-    ax.format_coord = lambda t, y: "t = {}  y = {:8f}".format(Period(ordinal=int(t), freq=ax.freq), y)
+    ax.format_coord = lambda t, y: ("t = {0}  "
+                                    "y = {1:8f}".format(Period(ordinal=int(t),
+                                                               freq=ax.freq),
+                                                        y))
 
     return lines