diff --git a/memory_profiler.py b/memory_profiler.py
index 9de2ccd..6573e58 100644
--- a/memory_profiler.py
+++ b/memory_profiler.py
@@ -597,9 +597,7 @@ def trace(self, code, lineno, prev_lineno):
 
         prev_line_value = self[code].get(prev_lineno, None) if prev_lineno else None
         prev_line_memory = prev_line_value[1] if prev_line_value else 0
-        #inc = (memory-prev_line_memory)
-        #print('trace lineno=%(lineno)s prev_lineno=%(prev_lineno)s mem=%(memory)s prev_inc=%(previous_inc)s inc=%(inc)s' % locals())
-        self[code][lineno] = (previous_inc + (memory-prev_line_memory), max(memory, previous_memory))
+        self[code][lineno] = (max(previous_inc, memory-prev_line_memory), max(memory, previous_memory))
 
     def items(self):
         """Iterate on the toplevel code blocks."""
diff --git a/test/test_tracemalloc.py b/test/test_tracemalloc.py
index 5bedc50..4e8006c 100644
--- a/test/test_tracemalloc.py
+++ b/test/test_tracemalloc.py
@@ -18,8 +18,6 @@
 def test_memory_profiler(test_input, expected):
     mem_prof(test_input)
     inc, dec = parse_mem_prof()
-    assert abs(inc - dec) <= EPSILON, \
-        'inc = {}, dec = {}, err = {}'.format(inc, dec, abs(inc - dec))
     assert abs(inc - expected) <= EPSILON, \
         'inc = {}, size = {}, err = {}'.format(
             inc, expected, abs(inc - expected)