diff --git a/test/unittest_analyze.py b/test/unittest_analyze.py
index f7dbd70c4db08072e2c35cec51696d185e5e95cb_dGVzdC91bml0dGVzdF9hbmFseXplLnB5..636bef7fd229c5b147e4baadef77a98d0dae89fb_dGVzdC91bml0dGVzdF9hbmFseXplLnB5 100644
--- a/test/unittest_analyze.py
+++ b/test/unittest_analyze.py
@@ -174,7 +174,7 @@
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = node.children[0].solutions
         self.assertEqual(sols, [{'X': 'Person'}])
-        node = self.helper.simplify(node)
+        self.helper.simplify(node)
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = node.children[0].solutions
         self.assertEqual(sols, [{}])
@@ -275,7 +275,7 @@
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = sorted(node.children[0].solutions)
         self.assertEqual(sols, [{'E1': 'Company', 'E2': 'Person'}])
-        node = self.helper.simplify(node)
+        self.helper.simplify(node)
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = sorted(node.children[0].solutions)
         self.assertEqual(sols, [{'E1': 'Company'}])
@@ -284,7 +284,7 @@
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = sorted(node.children[0].solutions)
         self.assertEqual(sols, [{'E1': 'Company', 'E2': 'Person'}])
-        node = self.helper.simplify(node)
+        self.helper.simplify(node)
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = sorted(node.children[0].solutions)
         self.assertEqual(sols, [{'E1': 'Company'}])
@@ -294,7 +294,7 @@
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = sorted(node.children[0].solutions)
         self.assertEqual(sols, [{'P': 'Person', 'X': 'Person'}])
-        node = self.helper.simplify(node)
+        self.helper.simplify(node)
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = sorted(node.children[0].solutions)
         self.assertEqual(sols, [{'P': 'Person'}])
@@ -304,7 +304,7 @@
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = sorted(node.children[0].solutions)
         self.assertEqual(sols, [{'P': 'Person', 'X': 'Person'}], [{'E1': 'Company', 'E2': 'Person'}])
-        node = self.helper.simplify(node)
+        self.helper.simplify(node)
         self.helper.compute_solutions(node, debug=DEBUG)
         sols = sorted(node.children[0].solutions)
         self.assertEqual(sols, [{'P': 'Person'}], [{'E1': 'Company'}])