From d1c47b6fb27b7d56cc2339e0fd2c151beac95b36 Mon Sep 17 00:00:00 2001
From: Yuanhao Geng <41546976+GYHHAHA@users.noreply.github.com>
Date: Tue, 12 Jul 2022 14:09:30 -0500
Subject: [PATCH 1/3] Update test_sort.py

---
 pandas/tests/reshape/concat/test_sort.py | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/pandas/tests/reshape/concat/test_sort.py b/pandas/tests/reshape/concat/test_sort.py
index a789dc0f8dc83..326abb39a2ca8 100644
--- a/pandas/tests/reshape/concat/test_sort.py
+++ b/pandas/tests/reshape/concat/test_sort.py
@@ -92,7 +92,22 @@ def test_concat_frame_with_sort_false(self):
         expected = DataFrame([[2, np.nan], [np.nan, 1]], index=[2, 1], columns=[2, 1])
 
         tm.assert_frame_equal(result, expected)
-
+        
+        # GH 37937
+        df1 = DataFrame({"a": [1, 2, 3], "b": [4, 5, 6]}, index=[1, 2, 3])
+        df2 = DataFrame({"c": [7, 8, 9], "d": [10, 11, 12]}, index=[3, 1, 6])
+        result = pd.concat([df2, df1], axis=1, sort=False)
+        expected = DataFrame(
+            [
+                [7.0, 10.0, 3.0, 6.0],
+                [8.0, 11.0, 1.0, 4.0],
+                [9.0, 12.0, np.nan, np.nan],
+                [np.nan, np.nan, 2.0, 5.0],
+            ],
+            index=[3, 1, 6, 2],
+            columns=["c", "d", "a", "b"],
+        )
+        
     def test_concat_sort_none_warning(self):
         # GH#41518
         df = DataFrame({1: [1, 2], "a": [3, 4]})

From 852e289301ef92252dc7f831b28c93fb4f6a8e67 Mon Sep 17 00:00:00 2001
From: Yuanhao Geng <41546976+GYHHAHA@users.noreply.github.com>
Date: Tue, 12 Jul 2022 14:15:45 -0500
Subject: [PATCH 2/3] Update test_sort.py

---
 pandas/tests/reshape/concat/test_sort.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pandas/tests/reshape/concat/test_sort.py b/pandas/tests/reshape/concat/test_sort.py
index 326abb39a2ca8..ca2d56c580ee9 100644
--- a/pandas/tests/reshape/concat/test_sort.py
+++ b/pandas/tests/reshape/concat/test_sort.py
@@ -92,7 +92,7 @@ def test_concat_frame_with_sort_false(self):
         expected = DataFrame([[2, np.nan], [np.nan, 1]], index=[2, 1], columns=[2, 1])
 
         tm.assert_frame_equal(result, expected)
-        
+
         # GH 37937
         df1 = DataFrame({"a": [1, 2, 3], "b": [4, 5, 6]}, index=[1, 2, 3])
         df2 = DataFrame({"c": [7, 8, 9], "d": [10, 11, 12]}, index=[3, 1, 6])
@@ -107,7 +107,7 @@ def test_concat_frame_with_sort_false(self):
             index=[3, 1, 6, 2],
             columns=["c", "d", "a", "b"],
         )
-        
+
     def test_concat_sort_none_warning(self):
         # GH#41518
         df = DataFrame({1: [1, 2], "a": [3, 4]})

From e988e095ec8d8e8a0ac77fa11a75a4eea3e0187c Mon Sep 17 00:00:00 2001
From: Yuanhao Geng <41546976+GYHHAHA@users.noreply.github.com>
Date: Tue, 12 Jul 2022 14:20:29 -0500
Subject: [PATCH 3/3] add assert

---
 pandas/tests/reshape/concat/test_sort.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pandas/tests/reshape/concat/test_sort.py b/pandas/tests/reshape/concat/test_sort.py
index ca2d56c580ee9..e83880625f3d6 100644
--- a/pandas/tests/reshape/concat/test_sort.py
+++ b/pandas/tests/reshape/concat/test_sort.py
@@ -107,6 +107,7 @@ def test_concat_frame_with_sort_false(self):
             index=[3, 1, 6, 2],
             columns=["c", "d", "a", "b"],
         )
+        tm.assert_frame_equal(result, expected)
 
     def test_concat_sort_none_warning(self):
         # GH#41518