diff --git a/test/test.py b/test/test.py
new file mode 100644
index 0000000..9fd74fa
--- /dev/null
+++ b/test/test.py
@@ -0,0 +1,21 @@
+from gwygsf import GSF
+import matplotlib.pyplot as plt
+
+plt.ioff()
+
+def makeplot(name):
+	c = GSF()
+	c.fromfile(name)
+	x0 = float(c.attr["XOffset"]) * 1e6
+	xl = x0 + float(c.attr["XReal"]) * 1e6
+	y0 = float(c.attr["YOffset"]) * 1e6
+	yl = y0 + float(c.attr["YReal"]) * 1e6
+
+	fig, ax = plt.subplots()
+	gr = ax.imshow(c.d, extent=(x0,xl,y0,yl))
+	ax.set_xlabel("um")
+	ax.set_ylabel("um")
+	fig.colorbar(gr)
+	fig.savefig(f'{name}.png')
+
+makeplot('test.gsf')