diff --git a/phasecalculator/test/analysistest/similarityanalysistest.py b/phasecalculator/test/analysistest/similarityanalysistest.py
index 93920e1f25acc13144d9e0de308b3010236ff76f..3fad2171308c06c17c9809914bedb9fede4f076e 100755
--- a/phasecalculator/test/analysistest/similarityanalysistest.py
+++ b/phasecalculator/test/analysistest/similarityanalysistest.py
@@ -122,7 +122,6 @@ class SimilarityAnalysisTestCase(unittest.TestCase):
         """
         simanalysis.compare_with_pure_solvents([self.expected_free_poly], "")
         self.assertTrue(pathlib.Path(self.actual_series_file).is_file())
-        self.assertTrue(pathlib.Path(self.actual_matrix_file).is_file())
         actual_dataframe = pandas.read_csv(self.actual_series_file, sep="\t",header=0,index_col=0)
         self.assertEqual((261,1), actual_dataframe.shape)
     def test_compare_solvent_list(self):