diff --git a/arkane/gaussianTest.py b/arkane/gaussianTest.py
index 20978c5386a..166027263ba 100644
--- a/arkane/gaussianTest.py
+++ b/arkane/gaussianTest.py
@@ -130,5 +130,25 @@ def testLoadEthyleneFromGaussianLog_G3(self):
         self.assertEqual(conformer.spinMultiplicity, 1)
         self.assertEqual(conformer.opticalIsomers, 1)
 
+    def testLoadSymmetryAndOptics(self):
+        """
+        Uses a Gaussian03 log file for oxygen (O2) to test that its
+        molecular degrees of freedom can be properly read.
+        """
+
+        log = GaussianLog(os.path.join(os.path.dirname(__file__),'data','oxygen.log'))
+        optical, symmetry = log.get_optical_isomers_and_symmetry_number()
+        self.assertEqual(optical,1)
+        self.assertEqual(symmetry,2)
+
+        conf = log.loadConformer()[0]
+        self.assertEqual(conf.opticalIsomers, 1)
+        found_rotor = False
+        for mode in conf.modes:
+            if isinstance(mode,LinearRotor):
+                self.assertEqual(mode.symmetry,2)
+                found_rotor = True
+        self.assertTrue(found_rotor)
+
 if __name__ == '__main__':
     unittest.main( testRunner = unittest.TextTestRunner(verbosity=2) )