diff --git a/CHANGELOG.md b/CHANGELOG.md
index 436cb14a4bd..3df1d8a1a7f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [3.4.2] - UNRELEASED
+
+### Fixed
+- `row_width` param in `plotly.tools.make_subplots` now adjusts the ranges of the xaxes intuitively from top to bottom rather than bottom to top.
+
 ## [3.4.1] - 2018-11-09
 
 ### Updated
diff --git a/plotly/tests/test_core/test_tools/test_make_subplots.py b/plotly/tests/test_core/test_tools/test_make_subplots.py
index 5e78e18f247..c81548bfed1 100644
--- a/plotly/tests/test_core/test_tools/test_make_subplots.py
+++ b/plotly/tests/test_core/test_tools/test_make_subplots.py
@@ -2184,7 +2184,7 @@ def test_row_width_and_column_width(self):
                                         'x': 0.405,
                                         'xanchor': 'center',
                                         'xref': 'paper',
-                                        'y': 0.1875,
+                                        'y': 0.5625,
                                         'yanchor': 'bottom',
                                         'yref': 'paper'},
                                        {'font': {'size': 16},
@@ -2193,17 +2193,17 @@ def test_row_width_and_column_width(self):
                                         'x': 0.9550000000000001,
                                         'xanchor': 'center',
                                         'xref': 'paper',
-                                        'y': 0.1875,
+                                        'y': 0.5625,
                                         'yanchor': 'bottom',
                                         'yref': 'paper'}],
                        'xaxis': {'anchor': 'y', 'domain': [0.0, 0.81]},
                        'xaxis2': {'anchor': 'y2', 'domain': [0.91, 1.0]},
                        'xaxis3': {'anchor': 'y3', 'domain': [0.0, 0.81]},
                        'xaxis4': {'anchor': 'y4', 'domain': [0.91, 1.0]},
-                       'yaxis': {'anchor': 'x', 'domain': [0.4375, 1.0]},
-                       'yaxis2': {'anchor': 'x2', 'domain': [0.4375, 1.0]},
-                       'yaxis3': {'anchor': 'x3', 'domain': [0.0, 0.1875]},
-                       'yaxis4': {'anchor': 'x4', 'domain': [0.0, 0.1875]}}
+                       'yaxis': {'anchor': 'x', 'domain': [0.8125, 1.0]},
+                       'yaxis2': {'anchor': 'x2', 'domain': [0.8125, 1.0]},
+                       'yaxis3': {'anchor': 'x3', 'domain': [0.0, 0.5625]},
+                       'yaxis4': {'anchor': 'x4', 'domain': [0.0, 0.5625]}}
         })
         fig = tls.make_subplots(rows=2, cols=2,
                                 subplot_titles=('Title 1', 'Title 2', 'Title 3', 'Title 4'),
@@ -2238,7 +2238,7 @@ def test_row_width_and_shared_yaxes(self):
                                         'x': 0.225,
                                         'xanchor': 'center',
                                         'xref': 'paper',
-                                        'y': 0.1875,
+                                        'y': 0.5625,
                                         'yanchor': 'bottom',
                                         'yref': 'paper'},
                                        {'font': {'size': 16},
@@ -2247,17 +2247,16 @@ def test_row_width_and_shared_yaxes(self):
                                         'x': 0.775,
                                         'xanchor': 'center',
                                         'xref': 'paper',
-                                        'y': 0.1875,
+                                        'y': 0.5625,
                                         'yanchor': 'bottom',
                                         'yref': 'paper'}],
                        'xaxis': {'anchor': 'y', 'domain': [0.0, 0.45]},
-                       'xaxis2': {'anchor': 'free', 'domain': [0.55, 1.0], 'position': 0.4375},
+                       'xaxis2': {'anchor': 'free', 'domain': [0.55, 1.0], 'position': 0.8125},
                        'xaxis3': {'anchor': 'y2', 'domain': [0.0, 0.45]},
                        'xaxis4': {'anchor': 'free', 'domain': [0.55, 1.0], 'position': 0.0},
-                       'yaxis': {'anchor': 'x', 'domain': [0.4375, 1.0]},
-                       'yaxis2': {'anchor': 'x3', 'domain': [0.0, 0.1875]}}
+                       'yaxis': {'anchor': 'x', 'domain': [0.8125, 1.0]},
+                       'yaxis2': {'anchor': 'x3', 'domain': [0.0, 0.5625]}}
         })
-
         fig = tls.make_subplots(rows=2, cols=2, row_width=[1, 3], shared_yaxes=True,
                                 subplot_titles=('Title 1', 'Title 2', 'Title 3', 'Title 4'))
 
diff --git a/plotly/tools.py b/plotly/tools.py
index 3f6fd488069..21b4abcea55 100644
--- a/plotly/tools.py
+++ b/plotly/tools.py
@@ -969,6 +969,7 @@ def _checks(item, defaults):
     # set widths (with 'row_width')
     try:
         row_width = kwargs['row_width']
+        row_width.reverse()
         if not isinstance(row_width, list) or len(row_width) != rows:
             raise Exception(
                 "Keyword argument 'row_width' must be a list with {} "