diff --git a/matplotcheck/raster.py b/matplotcheck/raster.py
index a8f8e4da..9e8aa5f0 100644
--- a/matplotcheck/raster.py
+++ b/matplotcheck/raster.py
@@ -1,9 +1,10 @@
 import numpy as np
 
 from .base import PlotTester
+from .vector import VectorTester
 
 
-class RasterTester(PlotTester):
+class RasterTester(VectorTester):
     """A PlotTester for spatial raster plots.
 
     Parameters