diff --git a/pysnooper/tracer.py b/pysnooper/tracer.py
index b488a11..459ae84 100644
--- a/pysnooper/tracer.py
+++ b/pysnooper/tracer.py
@@ -296,9 +296,7 @@ class Tracer:
             if name not in old_local_reprs:
                 self.write('{indent}{newish_string}{name} = {value_repr}'.format(
                                                                        **locals()))
-
-        for name, value_repr in local_reprs.items():
-            if name in old_local_reprs and old_local_reprs[name] != value_repr:
+            elif old_local_reprs[name] != value_repr:
                 self.write('{indent}Modified var:.. {name} = {value_repr}'.format(
                                                                    **locals()))
 
diff --git a/tests/test_pysnooper.py b/tests/test_pysnooper.py
index 4e31f14..d3882e4 100644
--- a/tests/test_pysnooper.py
+++ b/tests/test_pysnooper.py
@@ -276,8 +276,8 @@ def test_watch_explode():
             VariableEntry('(lst + [])[2]', '9'),
             VariableEntry('lst + []'),
             LineEntry(),
-            VariableEntry('(lst + [])[3]', '10'),
             VariableEntry('lst'),
+            VariableEntry('(lst + [])[3]', '10'),
             VariableEntry('lst + []'),
             ReturnEntry(),
             ReturnValueEntry('None')