diff --git a/GPy/plotting/matplot_dep/plot_definitions.py b/GPy/plotting/matplot_dep/plot_definitions.py
index 290aa743..34f32ac5 100644
--- a/GPy/plotting/matplot_dep/plot_definitions.py
+++ b/GPy/plotting/matplot_dep/plot_definitions.py
@@ -122,7 +122,7 @@ class MatplotlibPlots(AbstractPlottingLibrary):
     def barplot(self, ax, x, height, width=0.8, bottom=0, color=Tango.colorsHex['mediumBlue'], label=None, **kwargs):
         if 'align' not in kwargs:
             kwargs['align'] = 'center'
-        return ax.bar(left=x, height=height, width=width,
+        return ax.bar(x=x, height=height, width=width,
                bottom=bottom, label=label, color=color,
                **kwargs)
 
diff --git a/GPy/testing/model_tests.py b/GPy/testing/model_tests.py
index 9187f209..adfbc837 100644
--- a/GPy/testing/model_tests.py
+++ b/GPy/testing/model_tests.py
@@ -238,7 +238,7 @@ class MiscTests(unittest.TestCase):
         # Not easy to check if woodbury_inv is correct in itself as it requires a large derivation and expression
         Kinv = m.posterior.woodbury_inv
         K_hat = k.K(self.X_new) - k.K(self.X_new, Z).dot(Kinv).dot(k.K(Z, self.X_new))
-        K_hat = np.clip(K_hat, 1e-15, np.inf)
+        # K_hat = np.clip(K_hat, 1e-15, np.inf)
 
         mu, covar = m.predict_noiseless(self.X_new, full_cov=True)
         self.assertEquals(mu.shape, (self.N_new, self.D))