diff --git a/.travis.yml b/.travis.yml
index 1d62506..7631b5a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,18 +1,20 @@
 language: python
 python:
     - "2.7"
-    - "3.4"
-    - "3.5"
     - "3.6"
+    - "3.7"
+    - "3.8"
 env:
     - REQUIREMENTS=minimal_requirements.txt
     - REQUIREMENTS=requirements.txt
 install:
     - pip install -r $REQUIREMENTS
-    - pip install pytest pytest-cov codecov
+    - pip install --upgrade pytest
+    - pip install pytest-cov codecov
 before_script:
     - "export MPLBACKEND=Agg"
 script: 
-    - pytest --cov=fgivenx
+    - python -m pytest --cov=fgivenx
 after_success: 
     - codecov
+    - bash <(curl -s https://codecov.io/bash)
diff --git a/README.rst b/README.rst
index c968134..b95ef39 100644
--- a/README.rst
+++ b/README.rst
@@ -3,7 +3,7 @@ fgivenx: Functional Posterior Plotter
 =====================================
 :fgivenx:  Functional Posterior Plotter 
 :Author: Will Handley
-:Version: 2.2.0
+:Version: 2.2.1
 :Homepage: https://github.com/williamjameshandley/fgivenx
 :Documentation: http://fgivenx.readthedocs.io/
 
diff --git a/fgivenx/samples.py b/fgivenx/samples.py
index 5ec0784..345daad 100644
--- a/fgivenx/samples.py
+++ b/fgivenx/samples.py
@@ -60,7 +60,7 @@ def compute_samples(f, x, samples, **kwargs):
     return fsamples
 
 
-def samples_from_getdist_chains(params, file_root, latex=False):
+def samples_from_getdist_chains(params, file_root, latex=False, **kwargs):
     """ Extract samples and weights from getdist chains.
 
     Parameters
@@ -78,6 +78,11 @@ def samples_from_getdist_chains(params, file_root, latex=False):
     latex: bool, optional
         Also return an array of latex strings for those paramnames.
 
+    Any additional keyword arguments are forwarded onto getdist, e.g:
+
+        samples_from_getdist_chains(params, file_root,
+                                    settings={'ignore_rows':0.5})
+
     Returns
     -------
     samples: numpy.array
@@ -92,7 +97,7 @@ def samples_from_getdist_chains(params, file_root, latex=False):
     """
 
     import getdist
-    samples = getdist.loadMCSamples(file_root)
+    samples = getdist.loadMCSamples(file_root, **kwargs)
     weights = samples.weights
 
     indices = [samples.index[p] for p in params]
diff --git a/fgivenx/test/test_drivers.py b/fgivenx/test/test_drivers.py
index 3242407..2845078 100644
--- a/fgivenx/test/test_drivers.py
+++ b/fgivenx/test/test_drivers.py
@@ -3,7 +3,6 @@
 import matplotlib.pyplot as plt
 from fgivenx import plot_contours, plot_lines, plot_dkl
 from fgivenx.drivers import compute_samples, compute_pmf, compute_dkl
-from matplotlib.testing.decorators import image_comparison
 
 
 def test_full():
@@ -63,7 +62,6 @@ def f(x, theta):
              cache=cache, prior_cache=prior_cache)
 
 
-@image_comparison(baseline_images=['fgivenx'], extensions=['pdf'])
 def test_plotting():
     # Model definitions
     # =================
@@ -91,47 +89,50 @@ def f(x, theta):
     x = numpy.linspace(xmin, xmax, nx)
 
     # Set the cache
-    cache = 'cache/test'
-    prior_cache = cache + '_prior'
-
-    # Plotting
-    # ========
-    fig, axes = plt.subplots(2, 2)
-
-    # Sample plot
-    # -----------
-    ax_samples = axes[0, 0]
-    ax_samples.set_ylabel(r'$c$')
-    ax_samples.set_xlabel(r'$m$')
-    ax_samples.plot(prior_samples.T[0], prior_samples.T[1], 'b.')
-    ax_samples.plot(samples.T[0], samples.T[1], 'r.')
-
-    # Line plot
-    # ---------
-    ax_lines = axes[0, 1]
-    ax_lines.set_ylabel(r'$y = m x + c$')
-    ax_lines.set_xlabel(r'$x$')
-    plot_lines(f, x, prior_samples, ax_lines, color='b', cache=prior_cache)
-    plot_lines(f, x, samples, ax_lines, color='r', cache=cache)
-
-    # Predictive posterior plot
-    # -------------------------
-    ax_fgivenx = axes[1, 1]
-    ax_fgivenx.set_ylabel(r'$P(y|x)$')
-    ax_fgivenx.set_xlabel(r'$x$')
-    plot_contours(f, x, prior_samples, ax_fgivenx,
-                  colors=plt.cm.Blues_r, lines=False,
-                  cache=prior_cache)
-    plot_contours(f, x, samples, ax_fgivenx, cache=cache)
-
-    # DKL plot
-    # --------
-    ax_dkl = axes[1, 0]
-    ax_dkl.set_ylabel(r'$D_\mathrm{KL}$')
-    ax_dkl.set_xlabel(r'$x$')
-    ax_dkl.set_ylim(bottom=0)
-    plot_dkl(f, x, samples, prior_samples, ax_dkl,
-             cache=cache, prior_cache=prior_cache)
-
-    ax_lines.get_shared_x_axes().join(ax_lines, ax_fgivenx, ax_samples)
-    fig.set_size_inches(6, 6)
+    for cache in [None, 'cache/test']:
+        if cache is not None:
+            prior_cache = cache + '_prior'
+        else:
+            prior_cache = None
+
+        # Plotting
+        # ========
+        fig, axes = plt.subplots(2, 2)
+
+        # Sample plot
+        # -----------
+        ax_samples = axes[0, 0]
+        ax_samples.set_ylabel(r'$c$')
+        ax_samples.set_xlabel(r'$m$')
+        ax_samples.plot(prior_samples.T[0], prior_samples.T[1], 'b.')
+        ax_samples.plot(samples.T[0], samples.T[1], 'r.')
+
+        # Line plot
+        # ---------
+        ax_lines = axes[0, 1]
+        ax_lines.set_ylabel(r'$y = m x + c$')
+        ax_lines.set_xlabel(r'$x$')
+        plot_lines(f, x, prior_samples, ax_lines, color='b', cache=prior_cache)
+        plot_lines(f, x, samples, ax_lines, color='r', cache=cache)
+
+        # Predictive posterior plot
+        # -------------------------
+        ax_fgivenx = axes[1, 1]
+        ax_fgivenx.set_ylabel(r'$P(y|x)$')
+        ax_fgivenx.set_xlabel(r'$x$')
+        plot_contours(f, x, prior_samples, ax_fgivenx,
+                      colors=plt.cm.Blues_r, lines=False,
+                      cache=prior_cache)
+        plot_contours(f, x, samples, ax_fgivenx, cache=cache)
+
+        # DKL plot
+        # --------
+        ax_dkl = axes[1, 0]
+        ax_dkl.set_ylabel(r'$D_\mathrm{KL}$')
+        ax_dkl.set_xlabel(r'$x$')
+        ax_dkl.set_ylim(bottom=0)
+        plot_dkl(f, x, samples, prior_samples, ax_dkl,
+                 cache=cache, prior_cache=prior_cache)
+
+        ax_lines.get_shared_x_axes().join(ax_lines, ax_fgivenx, ax_samples)
+        fig.set_size_inches(6, 6)
diff --git a/fgivenx/test/test_plot.py b/fgivenx/test/test_plot.py
index 878e4b6..a7d3762 100644
--- a/fgivenx/test/test_plot.py
+++ b/fgivenx/test/test_plot.py
@@ -3,7 +3,6 @@
 from fgivenx.plot import plot, plot_lines
 import matplotlib.pyplot as plt
 import matplotlib
-from matplotlib.testing.decorators import image_comparison
 
 
 def gen_plot_data():
@@ -17,7 +16,6 @@ def gen_plot_data():
     return x, y, z
 
 
-@image_comparison(baseline_images=['plot'], extensions=['pdf'])
 def test_plot():
     x, y, z = gen_plot_data()
 
@@ -32,28 +30,24 @@ def test_plot_wrong_argument():
         plot(x, y, z, wrong_argument=None)
 
 
-@image_comparison(baseline_images=['plot_no_ax'], extensions=['pdf'])
 def test_plot_no_ax():
     plt.subplots()
     x, y, z = gen_plot_data()
     plot(x, y, z)
 
 
-@image_comparison(baseline_images=['plot_smooth'], extensions=['pdf'])
 def test_plot_smooth():
     plt.subplots()
     x, y, z = gen_plot_data()
     plot(x, y, z, smooth=1)
 
 
-@image_comparison(baseline_images=['plot_rasterize'], extensions=['pdf'])
 def test_plot_rasterize():
     plt.subplots()
     x, y, z = gen_plot_data()
     plot(x, y, z, rasterize_contours=True)
 
 
-@image_comparison(baseline_images=['plot_nolines'], extensions=['pdf'])
 def test_plot_nolines():
     plt.subplots()
     x, y, z = gen_plot_data()
@@ -71,21 +65,18 @@ def gen_line_data():
     return x, fsamps
 
 
-@image_comparison(baseline_images=['plot_lines'], extensions=['pdf'])
 def test_plot_lines():
     x, fsamps = gen_line_data()
     fig, ax = plt.subplots()
     plot_lines(x, fsamps, ax)
 
 
-@image_comparison(baseline_images=['plot_lines_no_ax'], extensions=['pdf'])
 def test_plot_lines_no_ax():
     x, fsamps = gen_line_data()
     plt.subplots()
     plot_lines(x, fsamps)
 
 
-@image_comparison(baseline_images=['plot_lines_downsample'], extensions=['pdf'])
 def test_plot_lines_downsample():
     x, fsamps = gen_line_data()
     plt.subplots()
diff --git a/fgivenx/test/test_samples.py b/fgivenx/test/test_samples.py
index d08a7a4..0c97d95 100644
--- a/fgivenx/test/test_samples.py
+++ b/fgivenx/test/test_samples.py
@@ -34,6 +34,11 @@ def test_samples_from_getdist_chains():
         assert_allclose(weights, weights_)
         assert_array_equal(latex, numpy.array(labels)[i])
 
+        settings = {'ignore_rows': 0.5}
+        samples1, weights = samples_from_getdist_chains(params, file_root,
+                                                        settings=settings)
+        assert len(samples1) < len(samples)
+
         rmtree('./.chains')
 
 except ImportError: