diff --git a/rf/tests/test_harmonics.py b/rf/tests/test_harmonics.py
new file mode 100644
index 0000000..a433829
--- /dev/null
+++ b/rf/tests/test_harmonics.py
@@ -0,0 +1,45 @@
+# Copyright 2013-2016 Tom Eulenfeld, MIT license
+"""
+Tests for harmonics module.
+"""
+import unittest
+
+from rf.rfstream import read_rf, rfstats
+from rf.harmonics import harmonics
+import warnings
+
+class HarmonicsTestCase(unittest.TestCase):
+    def test_harmonics_RT(self):
+        stream = read_rf()
+        rfstats(stream)
+        stream.filter('bandpass',freqmin=0.33,freqmax=1)
+        stream.trim2(-5,15)
+        stream.rf(deconvolve='multitaper',rotate='NE->RT',\
+                    gauss=0.5,K=3,tband=4,T=10,olap=0.75,normalize=0)
+        with warnings.catch_warnings():  # warns for sparse data; generally bad but ok for test
+            warnings.simplefilter("ignore")
+            harm = harmonics(stream,components='RT',scalars=(1,1),method='time')
+        trtest = harm.select(location='mod',channel='0')[0]
+        self.assertEqual(trtest.data.argmax(),100)
+        self.assertEqual(trtest.data.max().round(4),1.1839)
+
+    def test_harmonics_R(self):
+        stream = read_rf()
+        rfstats(stream)
+        stream.filter('bandpass',freqmin=0.33,freqmax=1)
+        stream.trim2(-5,15)
+        stream.rf(deconvolve='multitaper',rotate='NE->RT',\
+                    gauss=0.5,K=3,tband=4,T=10,olap=0.75,normalize=0)
+        with warnings.catch_warnings():  # warns for sparse data; generally bad but ok for test
+            warnings.simplefilter("ignore")
+            harm = harmonics(stream,components='R',method='time')
+        trtest = harm.select(location='mod',channel='0')[0]
+        self.assertEqual(trtest.data.argmax(),100)
+        self.assertEqual(trtest.data.max().round(4),1.7725)
+
+def suite():
+    return unittest.makeSuite(HarmonicsTestCase, 'test')
+
+if __name__ == '__main__':
+    unittest.main(defaultTest='suite')
+
diff --git a/rf/tests/test_imaging.py b/rf/tests/test_imaging.py
index aaf5d7f..82d0e9e 100644
--- a/rf/tests/test_imaging.py
+++ b/rf/tests/test_imaging.py
@@ -35,6 +35,15 @@ def test_plot_ppoints(self):
         stream = minimal_example_rf()
         plot_ppoints(stream.ppoints(50), inventory=stream)
 
+    def test_plot_harmonics(self):
+        from rf.imaging import plot_harmonics
+        from rf.harmonics import harmonics
+        stream = minimal_example_rf()
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore")
+            harm = harmonics(stream,components='QT',scalars=(1,1))
+        plot_harmonics(harm)
+
 
 def suite():
     return unittest.makeSuite(ImagingTestCase, 'test')